---------------------------------------------------------- JabiruEngine-List Digest Archive --- Total Messages Posted Sat 03/22/08: 27 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 05:38 AM - Re: JabiruEngine-List Digest: 1 Msgs - 03/21/08 (T. Graziano) 2. 08:09 AM - Re: Wiring 3300 to an alternator switch (KC7HFA) 3. 08:24 AM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 4. 08:43 AM - Re: Wiring 3300 to an alternator switch (KC7HFA) 5. 08:47 AM - Re: Re: Wiring 3300 to an alternator switch (Joe Ronco) 6. 08:58 AM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 7. 09:49 AM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 8. 09:52 AM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 9. 10:26 AM - Re: Re: Wiring 3300 to an alternator switch (Craig Payne) 10. 10:42 AM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 11. 05:50 PM - Re: Re: Wiring 3300 to an alternator switch (Peter Harris) 12. 06:27 PM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 13. 07:07 PM - Re: Re: Wiring 3300 to an alternator switch (Ron Shannon) 14. 07:28 PM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 15. 07:40 PM - Re: Wiring 3300 to an alternator switch (wypaul) 16. 07:45 PM - Re: Re: Wiring 3300 to an alternator switch (Noel Loveys) 17. 07:55 PM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 18. 08:00 PM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 19. 08:20 PM - Re: Re: Wiring 3300 to an alternator switch (Noel Loveys) 20. 08:23 PM - Re: Re: Wiring 3300 to an alternator switch (Noel Loveys) 21. 08:26 PM - Re: Re: Wiring 3300 to an alternator switch (Noel Loveys) 22. 08:37 PM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 23. 08:41 PM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 24. 08:45 PM - Re: Re: Wiring 3300 to an alternator switch (Noel Loveys) 25. 08:49 PM - Re: Re: Wiring 3300 to an alternator switch (Noel Loveys) 26. 08:55 PM - Re: Re: Wiring 3300 to an alternator switch (BobsV35B@aol.com) 27. 09:06 PM - Re: Re: Wiring 3300 to an alternator switch (Noel Loveys) ________________________________ Message 1 _____________________________________ Time: 05:38:56 AM PST US From: "T. Graziano" Subject: JabiruEngine-List: Re: JabiruEngine-List Digest: 1 Msgs - 03/21/08 I use a Cessna Type Alt/Master split switch, which came with my Power Panel. The Alt, which usually provides power for the Alt Field in a regular alternator (the Jab has a permanent magnet alternator), provides +12V to a Radio Shack, 12V - 30 Amp relay when the alt switch is ON. The "Red" wire from my voltage regulator goes to the relay and then to the master solenoid. The master solenoid also has a line from the battery, so in effect the alternator provides power to the battery also when the relay is on, i.e Alt ON. I also have a 30 Amp fuse in the line. I have the "yellow wire" (voltage sense wire for the alternator) attached straight to the batt + Tony Graziano 601XL/Jab3300; N493TG; 359 hrs ----- Original Message ----- > Subject: JabiruEngine-List: Wiring 3300 to an alternator switch > From: "pequeajim" > > > I am wondering if any of you are using a split master switch with your > Jabiru, > and if so, how did you wire the regulator side? > > Linda, I thought you guys did this? > > I am at the point where I would like to wire this switch and am wondering > how I > should do it? > > Jim! > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=171534#171534 > > > ________________________________ Message 2 _____________________________________ Time: 08:09:45 AM PST US Subject: JabiruEngine-List: Re: Wiring 3300 to an alternator switch From: "KC7HFA" I used the split master on my Jabiru 3300. If I remember correctly I took the yellow wire from the regulator and ran it to one pole of the "Alt" split switch. I then jumped the other pole of the "Alt" switch over to on side of the "Master" switch. Note: If the "Alt" switch is not "ON" with the engine running, you will NOT get a tachometer reading... Needless to say this issue caused me a lot of grief, until I realized I was causing my own problem! I can verify the exact schematic upon request. -------- Ron Asbill N601ZX - CH-601 XL Jabiru 3300 Completed and Flying!~ Read this topic online here: http://forums.matronics.com/viewtopic.php?p=171722#171722 ________________________________ Message 3 _____________________________________ Time: 08:24:42 AM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Ron, I am absolutely, totally, and completely befuddled as to how the alternator works on the Jabiru engine. When I ask questions, I am told it works just like all other permanent magnet alternators, but I can find no instructional documentation that will explain how such alternators are supposed to work. What I seem to get for an answer to my question is direction as to which wire to hook where. What I want is instructional material that will tell my how and why it works. It is very difficult to trouble shot anything which I do not understand. Can you or anyone else direct me to a source for such education? Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:10:19 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: --> JabiruEngine-List message posted by: "KC7HFA" I used the split master on my Jabiru 3300. If I remember correctly I took the yellow wire from the regulator and ran it to one pole of the "Alt" split switch. I then jumped the other pole of the "Alt" switch over to on side of the "Master" switch. Note: If the "Alt" switch is not "ON" with the engine running, you will NOT get a tachometer reading... Needless to say this issue caused me a lot of grief, until I realized I was causing my own problem! I can verify the exact schematic upon request. -------- Ron Asbill N601ZX - CH-601 XL Jabiru 3300 Completed and Flying!~ **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 4 _____________________________________ Time: 08:43:49 AM PST US Subject: JabiruEngine-List: Re: Wiring 3300 to an alternator switch From: "KC7HFA" I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL Jabiru 3300 Completed and Flying!~ Read this topic online here: http://forums.matronics.com/viewtopic.php?p=171729#171729 ________________________________ Message 5 _____________________________________ Time: 08:47:43 AM PST US From: "Joe Ronco" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Chapter 3 in The AeroElectric Connection Book talks about PM alternators. Joe R From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 9:22 AM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Ron, I am absolutely, totally, and completely befuddled as to how the alternator works on the Jabiru engine. When I ask questions, I am told it works just like all other permanent magnet alternators, but I can find no instructional documentation that will explain how such alternators are supposed to work. What I seem to get for an answer to my question is direction as to which wire to hook where. What I want is instructional material that will tell my how and why it works. It is very difficult to trouble shot anything which I do not understand. Can you or anyone else direct me to a source for such education? Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:10:19 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I used the split master on my Jabiru 3300. If I remember correctly I took the yellow wire from the regulator and ran it to one pole of the "Alt" split switch. I then jumped the other pole of the "Alt" switch over to on side of the "Master" switch. Note: If the "Alt" switch is not "ON" with the engine running, you will NOT get a tachometer reading... Needless to say this issue caused me a lot of grief, until I realized I was causing my own problem! I can verify the exact schematic upon request. -------- Ron Asbill N601ZX - CH-601 XL Jabiru 3300 Completed and Flying!~ _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 6 _____________________________________ Time: 08:58:37 AM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Ron, I graduated from the Aviation Electrician Mate training at Naval Air Station, Jacksonville, in 1947 (top man in my class by the way) but can recall no training concerning permanent magnet alternators! Thanks for the reference. I will get to studying right away. Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: --> JabiruEngine-List message posted by: "KC7HFA" I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL Jabiru 3300 Completed and Flying!~ **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 7 _____________________________________ Time: 09:49:32 AM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Once Again Ron, That information has been very helpful in directing me to some of the problems I had wondered about. Do you have any idea how sophisticated is the controlling device associated with the Jabiru? Sounds like Evinrude has done quite well! The diodes I do understand. They were being discussed as the future when I went through school and I have kept abreast of such development. All of the principles mentioned are still the same as before, full wave rectification and all, but I still do not have good handle on the voltage regulation fine points. It appears as if they just sink excess current. Sounds kinda hairy to those of us familiar with power conservationist attitudes. My training was in the day of carbon pile regulators. Thanks again, I now know that I can reference outboard motors for more information. Have you found any documentation that is specific to how Jabiru controls or regulates the output? Is there any sort of over voltage protection provided? While I am not generally a fan of "Crow Bar" protection. this might be used here to good advantage. It would be a shame to blow several thousand dollars worth of electronics if a battery connection were to fail. So much to be learned!! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: --> JabiruEngine-List message posted by: "KC7HFA" I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 8 _____________________________________ Time: 09:52:21 AM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Afternoon Joe, Gad! I should have looked! Thanks Joe. Once again, I will have to call upon 'Lectric Bob for my rescue. Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:48:38 A.M. Central Daylight Time, joe@halzel.com writes: Chapter 3 in The AeroElectric Connection Book talks about PM alternators. Joe R **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 9 _____________________________________ Time: 10:26:30 AM PST US From: "Craig Payne" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch There is a schematic of the regulator internals in the Jabiru manual. -- Craig From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 10:47 AM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Once Again Ron, That information has been very helpful in directing me to some of the problems I had wondered about. Do you have any idea how sophisticated is the controlling device associated with the Jabiru? Sounds like Evinrude has done quite well! The diodes I do understand. They were being discussed as the future when I went through school and I have kept abreast of such development. All of the principles mentioned are still the same as before, full wave rectification and all, but I still do not have good handle on the voltage regulation fine points. It appears as if they just sink excess current. Sounds kinda hairy to those of us familiar with power conservationist attitudes. My training was in the day of carbon pile regulators. Thanks again, I now know that I can reference outboard motors for more information. Have you found any documentation that is specific to how Jabiru controls or regulates the output? Is there any sort of over voltage protection provided? While I am not generally a fan of "Crow Bar" protection. this might be used here to good advantage. It would be a shame to blow several thousand dollars worth of electronics if a battery connection were to fail. So much to be learned!! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 10 ____________________________________ Time: 10:42:45 AM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Afternoon Craig, I did read that, but all it says is that if the voltage gets too high, it cuts off! No description of how it is supposed to work, how it cuts off and of what happens to the current flow and operating temperatures when it is cut off. What I am looking for is an explanation of the theory and the actual procedures used. I read Bob Nuckolls' explanation and the one so kindly provided by Ron about outboard motors. The most descriptive thus far has been the Evinrude material. I still have not seen anything that tells us how the current and/or voltage is regulated or controlled. It appears that crude systems just sink it to ground and generate heat doing so while Evinrude has seemingly found a way to mitigate the disadvantages of doing that. Still searching for the "Rest Of The Story"! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 12:27:48 P.M. Central Daylight Time, craig@craigandjean.com writes: There is a schematic of the regulator internals in the Jabiru manual. -- Craig **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 11 ____________________________________ Time: 05:50:38 PM PST US From: "Peter Harris" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Bob, You are right about the excess current it is taken to earth at the base of the regulator which should be mounted on a heat sink panel. AC output from the PM alternator varies with RPM and the excess energy is bled off to earth during the rectification/regulation process. It sounds a bit primitive but it is simple and effective. Over voltage protection is worthwile in case the regulator burns out. Peter H _____ From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Sunday, 23 March 2008 2:47 AM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Once Again Ron, That information has been very helpful in directing me to some of the problems I had wondered about. Do you have any idea how sophisticated is the controlling device associated with the Jabiru? Sounds like Evinrude has done quite well! The diodes I do understand. They were being discussed as the future when I went through school and I have kept abreast of such development. All of the principles mentioned are still the same as before, full wave rectification and all, but I still do not have good handle on the voltage regulation fine points. It appears as if they just sink excess current. Sounds kinda hairy to those of us familiar with power conservationist attitudes. My training was in the day of carbon pile regulators. Thanks again, I now know that I can reference outboard motors for more information. Have you found any documentation that is specific to how Jabiru controls or regulates the output? Is there any sort of over voltage protection provided? While I am not generally a fan of "Crow Bar" protection. this might be used here to good advantage. It would be a shame to blow several thousand dollars worth of electronics if a battery connection were to fail. So much to be learned!! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 12 ____________________________________ Time: 06:27:00 PM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Evening Peter, Thanks for the information. Do most Jabiru operators use some sort of over voltage protection? Is there a common method that has been successful? As I am sure you can tell, my knowledge in this area is woefully inadequate. Are there any good sources of data that I can study? If a contactor was opened by a crowbar or other over voltage protection such that it would save the electronics, would the alternator still be damaged or is there some modality that would cause it to reduce it's output? Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 7:51:24 P.M. Central Daylight Time, peterjfharris@bigpond.com writes: Bob, You are right about the excess current it is taken to earth at the base of the regulator which should be mounted on a heat sink panel. AC output from the PM alternator varies with RPM and the excess energy is bled off to earth during the rectification/regulation process. It sounds a bit primitive but it is simple and effective. Over voltage protection is worthwhile in case the regulator burns out. Peter H **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 13 ____________________________________ Time: 07:07:41 PM PST US From: "Ron Shannon" Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Bob, Use the B&C over voltage protection system (504-1 PM-OV) designed for permanent magnet alternators. See http://www.bandc.biz/PmOVdesc.html Ron On Sat, Mar 22, 2008 at 7:24 PM, wrote: > Good Evening Peter, > > Thanks for the information. > > Do most Jabiru operators use some sort of over voltage protection? Is > there a common method that has been successful? > > As I am sure you can tell, my knowledge in this area is woefully > inadequate. > > Are there any good sources of data that I can study? > > If a contactor was opened by a crowbar or other over voltage protection > such that it would save the electronics, would the alternator still be > damaged or is there some modality that would cause it to reduce it's output? > > Happy Skies, > > Old Bob > AKA > Bob Siegfried > ________________________________ Message 14 ____________________________________ Time: 07:28:23 PM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Evening Ron, I will contact Bill on Monday. Great thought! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 9:08:24 P.M. Central Daylight Time, rshannon@CRUZCOM.COM writes: Bob, Use the B&C over voltage protection system (504-1 PM-OV) designed for permanent magnet alternators. See _http://www.bandc.biz/PmOVdesc.html_ (http://www.bandc.biz/PmOVdesc.html) Ron **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 15 ____________________________________ Time: 07:40:10 PM PST US Subject: JabiruEngine-List: Re: Wiring 3300 to an alternator switch From: "wypaul" lectric Bob is the man for these question. I am using Bob's crowbar setup for over voltage protection with the Jabiru but flew behind a Revmaster for 200 hrs. without it. Ya don't need it tell you do. Bob's friends at B & C will be another good source of info. http://www.bandc.biz/parts.html Paul -------- Paul Spackman Q-2 Jabiru 3300 Read this topic online here: http://forums.matronics.com/viewtopic.php?p=171843#171843 ________________________________ Message 16 ____________________________________ Time: 07:45:45 PM PST US From: "Noel Loveys" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch That's where the confusion starts. If it has a permanent magnet it is called a generator or a magneto. If this is the case you you can shut off the output by switching the heavy wire that goes from the magneto to the battery. Generators and magnetos are somewhat limited in their capacity to generate electrical power so over voltage is not generally a consideration. Alternators, instead of spinning a large magnet inside a bunch of coils, spins an electromagnet instead. By varying the voltage hitting the electromagnet on a wire marked F for field or field coil, the output of the alternator can be varied... the more power delivered to the field coil through the F connector the more current produced by the alternator. The regulator controls this power output. The idea is two fold... First the current in the field coil is relatively small so a small current can control a much larger output current so the large contactors that used to be found in early cars and trucks are not needed. If too much current is fed to the F connector the alternator can actually go into overvoltage... This usually turns on a little light and at the same time chops the power to the field coil so the output of the alternator drops to 0. Either way a switch designed to take the maximum current output of the alternator or generator can be placed in the larger power wire between the alternator and the battery or main buss depending on how your plane is wired. Alternators all produce alternating current AC which needs to be turned into direct current DC. This is usually done through a little device called a rectifier bridge. This bridge is constructed by four considerably large diodes. Some alternators have one or two rectifier bridges built right into them. The reason a shut off switch in the large wire is a good idea is encase you burn out one or more of the diodes and short out your battery.... Actually a circuit breaker is also a good idea. The F lead, a ground and possibly a voltage sensing lead are generally connected via a plug in with a specific shape for your alternator..... The power output on the alternator is generally a lug with a nut to hold the wire on the lug and sometimes a plastic insulator around the lug. If your generating device only has one wire coming form it when it is a permanent magnet type and the voltage regulator then will be a set of contacts which are spring loaded and make and break the charging cycles. Such generators generally are designed to produce DC without the use of a rectifier bridge.. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 12:52 PM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Ron, I am absolutely, totally, and completely befuddled as to how the alternator works on the Jabiru engine. When I ask questions, I am told it works just like all other permanent magnet alternators, but I can find no instructional documentation that will explain how such alternators are supposed to work. What I seem to get for an answer to my question is direction as to which wire to hook where. What I want is instructional material that will tell my how and why it works. It is very difficult to trouble shot anything which I do not understand. Can you or anyone else direct me to a source for such education? Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:10:19 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I used the split master on my Jabiru 3300. If I remember correctly I took the yellow wire from the regulator and ran it to one pole of the "Alt" split switch. I then jumped the other pole of the "Alt" switch over to on side of the "Master" switch. Note: If the "Alt" switch is not "ON" with the engine running, you will NOT get a tachometer reading... Needless to say this issue caused me a lot of grief, until I realized I was causing my own problem! I can verify the exact schematic upon request. -------- Ron Asbill N601ZX - CH-601 XL Jabiru 3300 Completed and Flying!~ _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 17 ____________________________________ Time: 07:55:44 PM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Thanks Paul Do Not Archive Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 9:40:40 P.M. Central Daylight Time, loadout@bresnan.net writes: --> JabiruEngine-List message posted by: "wypaul" lectric Bob is the man for these question. I am using Bob's crowbar setup for over voltage protection with the Jabiru but flew behind a Revmaster for 200 hrs. without it. Ya don't need it tell you do. Bob's friends at B & C will be another good source of info. http://www.bandc.biz/parts.html Paul **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 18 ____________________________________ Time: 08:00:45 PM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Thanks Noel. We're gaining on it! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 Do not Archive In a message dated 3/22/2008 9:46:29 P.M. Central Daylight Time, noelloveys@yahoo.ca writes: That=99s where the confusion starts. If it has a permanent magnet it is called a generator or a magneto. If this is the case you you can shut off t he output by switching the heavy wire that goes from the magneto to the batter y. Generators and magnetos are somewhat limited in their capacity to generate electrical power so over voltage is not generally a consideration. Alternators, instead of spinning a large magnet inside a bunch of coils, spins an electromagnet instead. By varying the voltage hitting the electromagnet on a wire marked F for field or field coil, the output of the alternator can be varied... the more power delivered to the field coil through the F connector the more current produced by the alternator. The regulator contr ols this power output. The idea is two fold... First the current in the fiel d coil is relatively small so a small current can control a much larger outpu t current so the large contactors that used to be found in early cars and tru cks are not needed. If too much current is fed to the F connector the alternat or can actually go into overvoltage... This usually turns on a little light a nd at the same time chops the power to the field coil so the output of the alternator drops to 0. Either way a switch designed to take the maximum current output of the alternator or generator can be placed in the larger power wire between the alternator and the battery or main buss depending on how your plane is wire d. Alternators all produce alternating current AC which needs to be turned int o direct current DC. This is usually done through a little device called a rectifier bridge. This bridge is constructed by four considerably large diodes. Some alternators have one or two rectifier bridges built right int o them. The reason a shut off switch in the large wire is a good idea is encase you burn out one or more of the diodes and short out your battery.... Actually a circuit breaker is also a good idea. The F lead, a ground and possibly a voltage sensing lead are generally connected via a plug in with a specific shape for your alternator..... The power output on the alternator is generally a lug with a nut to hold the wire on the lug and sometimes a plastic insulator around the lug. If your generating device only has one wire coming form it when it is a permanent magnet type and the voltage regulator then will be a set of conta cts which are spring loaded and make and break the charging cycles. Such generators generally are designed to produce DC without the use of a rectif ier bridge.. Noel **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aol hom00030000000001) ________________________________ Message 19 ____________________________________ Time: 08:20:30 PM PST US From: "Noel Loveys" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch I just googled jabiru Schematic and came up with this: (top of thepage!) www.us jabiru.com/images/pdf/manuals/new%20stuff/3300HL-IM.pdf Everything you wanted to know about Jabiru engines and more besides... Check out page 54 for a circuit diagram. That diagram shows the output to the battery being switched ( Master) and protected by a fuse link. The feed to the main buss is not switched or protected.... I'd recommend a breaker of at least the capacity of the alternator. Funny on page 57 they say to hook up the battery direct... I don't htink they looked at their own schematic and that's what I'd go by. According to page 56 you can put a switch on the red wire that comes from pin #5 on the voltage regulator and then feed the output of that switch to the main buss. A word of caution here the solid state ( lots of diodes and transistors) rectifier/regulator may not be able to stand switching the alternator on and off during normal flight so save turning off the line to the main buss as an emergency procedure. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 2:17 PM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Once Again Ron, That information has been very helpful in directing me to some of the problems I had wondered about. Do you have any idea how sophisticated is the controlling device associated with the Jabiru? Sounds like Evinrude has done quite well! The diodes I do understand. They were being discussed as the future when I went through school and I have kept abreast of such development. All of the principles mentioned are still the same as before, full wave rectification and all, but I still do not have good handle on the voltage regulation fine points. It appears as if they just sink excess current. Sounds kinda hairy to those of us familiar with power conservationist attitudes. My training was in the day of carbon pile regulators. Thanks again, I now know that I can reference outboard motors for more information. Have you found any documentation that is specific to how Jabiru controls or regulates the output? Is there any sort of over voltage protection provided? While I am not generally a fan of "Crow Bar" protection. this might be used here to good advantage. It would be a shame to blow several thousand dollars worth of electronics if a battery connection were to fail. So much to be learned!! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 20 ____________________________________ Time: 08:23:50 PM PST US From: "Noel Loveys" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch On the left side of the schematic on page 54 (?) you see the basic rectifier bridge. The right hand side has a number of transistors which act as valves to keep the output of the generator (alternator) consistent. The wire shown running across the top and down to the master switch is the one that tells the transistors how much to turn on or off. All that stuff is inside the regulator and is not adjustable. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 3:10 PM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Afternoon Craig, I did read that, but all it says is that if the voltage gets too high, it cuts off! No description of how it is supposed to work, how it cuts off and of what happens to the current flow and operating temperatures when it is cut off. What I am looking for is an explanation of the theory and the actual procedures used. I read Bob Nuckolls' explanation and the one so kindly provided by Ron about outboard motors. The most descriptive thus far has been the Evinrude material. I still have not seen anything that tells us how the current and/or voltage is regulated or controlled. It appears that crude systems just sink it to ground and generate heat doing so while Evinrude has seemingly found a way to mitigate the disadvantages of doing that. Still searching for the "Rest Of The Story"! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 12:27:48 P.M. Central Daylight Time, craig@craigandjean.com writes: There is a schematic of the regulator internals in the Jabiru manual. -- Craig _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 21 ____________________________________ Time: 08:26:26 PM PST US From: "Noel Loveys" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Nothing with a turbine would have one! They also use variable displacement pumps to keep their alternators turning at a constant speed. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 1:26 PM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Ron, I graduated from the Aviation Electrician Mate training at Naval Air Station, Jacksonville, in 1947 (top man in my class by the way) but can recall no training concerning permanent magnet alternators! Thanks for the reference. I will get to studying right away. Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL Jabiru 3300 Completed and Flying!~ _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 22 ____________________________________ Time: 08:37:34 PM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Evening Noel, I note that the one you googled is dated as revision 4. My copy is revision 3 and I see that revision 4 shows all new pages! I guess I will have to print a whole new manual. I wonder if they really di d revise every page or if they just decided to list all of them as new? That's an awful lot of wasted paper! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:21:22 P.M. Central Daylight Time, noelloveys@yahoo.ca writes: I just googled jabiru Schematic and came up with this: (top of the page!) _www.usjabiru.com/images/pdf/manuals/new%20stuff/3300HL-IM.pdf_ (http://www.usjabiru.com/images/pdf/manuals/new%20stuff/3300HL-IM.pdf) Everything you wanted to know about Jabiru engines and more besides... Check out page 54 for a circuit diagram. That diagram shows the output to the battery being switched ( Master) and protected by a fuse link. The feed to the main buss is not switched or protected.... I=99d recommend a breaker of at least the capacity of the alternator. Funny on page 57 they say to hook up the battery direct... I don=99t htink they looked at their own schematic and that=99 s what I=99d go by. According to page 56 you can put a switch on the red wire that comes from pin #5 on the voltage regulator and then feed the output of that switch to the main buss. A word of caution here the solid state ( lots of diodes and transistors) rectifier/regulator may not be able to stand switching the alternator on and off during normal flight so save turning off the line to the main buss as an emergency procedure. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B @aol.com Sent: Saturday, March 22, 2008 2:17 PM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Once Again Ron, That information has been very helpful in directing me to some of the problems I had wondered about. Do you have any idea how sophisticated is th e controlling device associated with the Jabiru? Sounds like Evinrude has do ne quite well! The diodes I do understand. They were being discussed as the future when I went through school and I have kept abreast of such development. All of the principles mentioned are still the same as before, full wave rectification a nd all, but I still do not have good handle on the voltage regulation fine points. It appears as if they just sink excess current. Sounds kinda hairy to those of us familiar with power conservationist attitudes. My training was in the day of carbon pile regulators. Thanks again, I now know that I can reference outboard motors for more information. Have you found any documentation that is specific to how Jabiru controls or regulates the output? Is there any sort of over voltage protection provided? While I am not generally a fan of "Crow Bar" protection. this might be used here to good advantage. It would be a shame to blow several thousand dollars worth of el ectronics if a battery connection were to fail. So much to be learned!! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: --> JabiruEngine-List message posted by: "KC7HFA" I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps .. -------- Ron Asbill N601ZX - CH-601 XL ____________________________________ Create a Home Theater Like the Pros. _Watch the video on AOL Home_ (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aol hom0003000000000 1) . http://www.matronics.com/Navigator?JabiruEngine-List http://forums.matronics.com http://www.matronics.com/contribution (http://www.matronics.com/Navigator?JabiruEngine-List) (http://www.matronics.com/contribution) **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aol hom00030000000001) ________________________________ Message 23 ____________________________________ Time: 08:41:24 PM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Ah yes! The vaunted Vicker's Drive. Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 Do Not Archive In a message dated 3/22/2008 10:27:15 P.M. Central Daylight Time, noelloveys@yahoo.ca writes: Nothing with a turbine would have one! They also use variable displacement pumps to keep their alternators turning at a constant speed. Noel **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 24 ____________________________________ Time: 08:45:49 PM PST US From: "Noel Loveys" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch The regulator case itself should be a heat sink. In this case the regulator actually workd as a transistor controlled voltage divider circuit. The fuse link protects the battery and as I said I also recommend a switch or better yet a circuit breaker between pin 5 of the regulator and the main buss. Output is 20 amp continuous I think I would try a 20A breaker and if you start blowing it install a load meter and a 30A breaker. Under no circumstances though load the alternator past 20A continuous duty Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of Peter Harris Sent: Saturday, March 22, 2008 10:18 PM Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Bob, You are right about the excess current it is taken to earth at the base of the regulator which should be mounted on a heat sink panel. AC output from the PM alternator varies with RPM and the excess energy is bled off to earth during the rectification/regulation process. It sounds a bit primitive but it is simple and effective. Over voltage protection is worthwile in case the regulator burns out. Peter H _____ From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Sunday, 23 March 2008 2:47 AM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Once Again Ron, That information has been very helpful in directing me to some of the problems I had wondered about. Do you have any idea how sophisticated is the controlling device associated with the Jabiru? Sounds like Evinrude has done quite well! The diodes I do understand. They were being discussed as the future when I went through school and I have kept abreast of such development. All of the principles mentioned are still the same as before, full wave rectification and all, but I still do not have good handle on the voltage regulation fine points. It appears as if they just sink excess current. Sounds kinda hairy to those of us familiar with power conservationist attitudes. My training was in the day of carbon pile regulators. Thanks again, I now know that I can reference outboard motors for more information. Have you found any documentation that is specific to how Jabiru controls or regulates the output? Is there any sort of over voltage protection provided? While I am not generally a fan of "Crow Bar" protection. this might be used here to good advantage. It would be a shame to blow several thousand dollars worth of electronics if a battery connection were to fail. So much to be learned!! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. http://www.matronics.com/contribution ________________________________ Message 25 ____________________________________ Time: 08:49:22 PM PST US From: "Noel Loveys" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch The problem isn't in shutting down the line to the main buss... Damage to the regulator can be done when you turn on the alternator to the buss during heavy loads. If for some reason you want to shut down the output to the buss in flight you should shed all load on the buss before reconnecting the regulator output to the buss. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 10:54 PM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Evening Peter, Thanks for the information. Do most Jabiru operators use some sort of over voltage protection? Is there a common method that has been successful? As I am sure you can tell, my knowledge in this area is woefully inadequate. Are there any good sources of data that I can study? If a contactor was opened by a crowbar or other over voltage protection such that it would save the electronics, would the alternator still be damaged or is there some modality that would cause it to reduce it's output? Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 7:51:24 P.M. Central Daylight Time, peterjfharris@bigpond.com writes: Bob, You are right about the excess current it is taken to earth at the base of the regulator which should be mounted on a heat sink panel. AC output from the PM alternator varies with RPM and the excess energy is bled off to earth during the rectification/regulation process. It sounds a bit primitive but it is simple and effective. Over voltage protection is worthwhile in case the regulator burns out. Peter H _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. ________________________________ Message 26 ____________________________________ Time: 08:55:36 PM PST US From: BobsV35B@aol.com Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Printed and stuck in the manual! Thanks Noel. Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:46:47 P.M. Central Daylight Time, noelloveys@yahoo.ca writes: The regulator case itself should be a heat sink. In this case the regulator actually workd as a transistor controlled voltage divider circuit. The fuse link protects the battery and as I said I also recommend a switch or better yet a circuit breaker between pin 5 of the regulator and the main buss. Output is 20 amp continuous I think I would try a 20A breaker and if you start blowing it install a load meter and a 30A breaker. Under no circumstances though load the alternator past 20A continuous duty Noel **************Create a Home Theater Like the Pros. Watch the video on AOL Home. (http://home.aol.com/diy/home-improvement-eric-stromer?video=15?ncid=aolhom00030000000001) ________________________________ Message 27 ____________________________________ Time: 09:06:48 PM PST US From: "Noel Loveys" Subject: RE: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Great! Have look at the list of revised pages which follows the table of contents. It will give you a list of all the updated and added pages... Saves wear and tear on the printer, paper and cartridges. You may have to make notes of the different pages you will need and print only those pages... The old pages can go in the bottom of the bird cage. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Sunday, March 23, 2008 1:05 AM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Evening Noel, I note that the one you googled is dated as revision 4. My copy is revision 3 and I see that revision 4 shows all new pages! I guess I will have to print a whole new manual. I wonder if they really did revise every page or if they just decided to list all of them as new? That's an awful lot of wasted paper! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:21:22 P.M. Central Daylight Time, noelloveys@yahoo.ca writes: I just googled jabiru Schematic and came up with this: (top of the page!) www.us jabiru.com/images/pdf/manuals/new%20stuff/3300HL-IM.pdf Everything you wanted to know about Jabiru engines and more besides... Check out page 54 for a circuit diagram. That diagram shows the output to the battery being switched ( Master) and protected by a fuse link. The feed to the main buss is not switched or protected.... I=99d recommend a breaker of at least the capacity of the alternator. Funny on page 57 they say to hook up the battery direct... I don=99t htink they looked at their own schematic and that=99s what I=99d go by. According to page 56 you can put a switch on the red wire that comes from pin #5 on the voltage regulator and then feed the output of that switch to the main buss. A word of caution here the solid state ( lots of diodes and transistors) rectifier/regulator may not be able to stand switching the alternator on and off during normal flight so save turning off the line to the main buss as an emergency procedure. Noel From: owner-jabiruengine-list-server@matronics.com [mailto:owner-jabiruengine-list-server@matronics.com] On Behalf Of BobsV35B@aol.com Sent: Saturday, March 22, 2008 2:17 PM Subject: Re: JabiruEngine-List: Re: Wiring 3300 to an alternator switch Good Morning Once Again Ron, That information has been very helpful in directing me to some of the problems I had wondered about. Do you have any idea how sophisticated is the controlling device associated with the Jabiru? Sounds like Evinrude has done quite well! The diodes I do understand. They were being discussed as the future when I went through school and I have kept abreast of such development. All of the principles mentioned are still the same as before, full wave rectification and all, but I still do not have good handle on the voltage regulation fine points. It appears as if they just sink excess current. Sounds kinda hairy to those of us familiar with power conservationist attitudes. My training was in the day of carbon pile regulators. Thanks again, I now know that I can reference outboard motors for more information. Have you found any documentation that is specific to how Jabiru controls or regulates the output? Is there any sort of over voltage protection provided? While I am not generally a fan of "Crow Bar" protection. this might be used here to good advantage. It would be a shame to blow several thousand dollars worth of electronics if a battery connection were to fail. So much to be learned!! Happy Skies, Old Bob AKA Bob Siegfried Ancient Aviator 628 West 86th Street Downers Grove, IL 60516 630 985-8502 Stearman N3977A Brookeridge Air Park LL22 In a message dated 3/22/2008 10:44:28 A.M. Central Daylight Time, kc7hfa@totalusa.net writes: I learned electronics many years ago, while in the military. I just googled "permanent magnet regulator" and found this http://continuouswave.com/whaler/reference/PMA.html it gives a description of how the electricity is generated then how it's converted to DC via the regulator... Hope it helps. -------- Ron Asbill N601ZX - CH-601 XL _____ Create a Home Theater Like the Pros. Watch the video on AOL Home. http://www.matronics.com/Navigator?JabiruEngine-List http://forums.matronics.com http://www.matronics.com/contribution st href="http://www.matronics.com/Navigator?JabiruEngine-List">http://www. matronics.com/Navigator?JabiruEngine-List ..matronics.com/">http://forums.matronics.com ://www.matronics.com/contribution">http://www.matronics.com/contribution _____ Create a Home Theater Like the Pros. 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