---------------------------------------------------------- AeroElectric-List Digest Archive --- Total Messages Posted Wed 07/07/10: 15 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 09:31 AM - Re: Heat Sink necessary? (jonlaury) 2. 09:46 AM - Re: Z-31B Ground Power Contactor Diode (jonlaury) 3. 09:49 AM - Re: Re: Heat Sink necessary? (Robert L. Nuckolls, III) 4. 10:19 AM - Lithium Battery Option () 5. 11:16 AM - Re: Lithium Battery Option (Doug Ilg) 6. 12:09 PM - Re: Lithium Battery Option () 7. 01:18 PM - Re: Lithium Battery Option (rparigoris) 8. 01:19 PM - Dynon D10A sound (rparigoris) 9. 01:37 PM - Re: Dynon D10A sound (Werner Schneider) 10. 02:49 PM - Re: Lithium Battery Option (N38CW) 11. 02:56 PM - Re: Panel punch (Roger) 12. 03:29 PM - Re: Re: Lithium Battery Option (Jon Finley) 13. 03:35 PM - Re: Dynon D10A sound (rparigor@suffolk.lib.ny.us) 14. 03:48 PM - Re: Re: Heat Sink necessary? (Ken) 15. 07:29 PM - Re: Re: Heat Sink necessary? (Robert L. Nuckolls, III) ________________________________ Message 1 _____________________________________ Time: 09:31:25 AM PST US Subject: AeroElectric-List: Re: Heat Sink necessary? From: "jonlaury" Glen and Bob, Thanks. I used a .063 alum washer for a stand-off from my composite structure which allows air to the metal backside of the rectifier. I will add a larger surface area piece of alum w/recommended grease. The injectors are 55#/hr and my 6 cyl engine, with a bsfc of .55 lbs./hr/hp, will have a max fuel consumption of 132 lbs/hr so these injectors will only see a 40% duty cycle. At 75% they draw 9W each or 54 W, so my normal ops should draw about 2.5 amps. So my initial guess of 6a is too high. The 10 amp circuit recommended by the EFI mfgr is to cover all the bases including low voltage and higher power than my engine makes. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=304047#304047 ________________________________ Message 2 _____________________________________ Time: 09:46:47 AM PST US Subject: AeroElectric-List: Re: Z-31B Ground Power Contactor Diode From: "jonlaury" Thank you, sir. J Do Not Archive Read this topic online here: http://forums.matronics.com/viewtopic.php?p=304052#304052 ________________________________ Message 3 _____________________________________ Time: 09:49:12 AM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Heat Sink necessary? At 11:29 AM 7/7/2010, you wrote: > >Glen and Bob, Thanks. > >I used a .063 alum washer for a stand-off from my composite >structure which allows air to the metal backside of the rectifier. I >will add a larger surface area piece of alum w/recommended grease. Okay, recommend something on the order of 10 square inches of .062 aluminum. If you wanted to make it "tighter" on real-estate, you could bend the edges up so that the diode still sits on a flat spot, but the overall width is reduced. >The injectors are 55#/hr and my 6 cyl engine, with a bsfc of .55 >lbs./hr/hp, will have a max fuel consumption of 132 lbs/hr so these >injectors will only see a 40% duty cycle. At 75% they draw 9W each >or 54 W, so my normal ops should draw about 2.5 amps. So my initial >guess of 6a is too high. The 10 amp circuit recommended by the EFI >mfgr is to cover all the bases including low voltage and higher >power than my engine makes. Hmmmm . . . maybe you don't need to do anything with the diode. Wait until you're able to run the engine and take some measurements of your own. It sounds like it might be just fine with zero-heat sink. Bob . . . ________________________________ Message 4 _____________________________________ Time: 10:19:44 AM PST US Subject: AeroElectric-List: Lithium Battery Option From: Do Not Archive I just read Porsche now has a lightweight Lithium battery option for the new Boxster Spyder. They claim it's 22 pounds lighter than the standard job. I'd like to get a profile on the product. Over the counter I'd expect to pay big bucks just for the name. If anyone hears more about this, let us know. If I get a chance, I'll stop by the dealer for more info. http://editorial.autos.msn.com/article.aspx?cp-documentid=1118846 Glenn ________________________________ Message 5 _____________________________________ Time: 11:16:13 AM PST US From: Doug Ilg Subject: Re: AeroElectric-List: Lithium Battery Option As far as I know, the granddaddy of all-lithium battery uses is the Tesla =0ARoadster.- Of course, they run the entire car on the battery, so it's a very =0Adifferent beast.- I do know, though, that they get their batte ries made by =0APanasonic.- Given that, I'd say it's a very good bet that Panasonic makes the =0Abest lithium batteries available.- Cost is not a huge issue for a $110K car, so =0Athey weren't scrimping.=0A=0AMay be worth looking into.- You might be able to assemble your own from =0APanasonic parts.- Hey, we're experimentals, right?=0A-=0ADoug Ilg=0AGrumman Tiger N74818, College Park-Airport (KCGS), Maryland=0AChallenger II LSS LW (N6 41LG-reserved)-- kit underway at Laurel Suburban (W18)=0A ________________________________ Message 6 _____________________________________ Time: 12:09:43 PM PST US Subject: RE: AeroElectric-List: Lithium Battery Option From: Absolutely, If I could shave even 10 pounds off what my Odyssey battery weighs, that will make a difference. When you get down to it, this game is all about weight - keeping it off that is. I will find out what Porsche has done. Since they only use one battery, it will be interesting to learn about the expected capacity. Glenn E. Long Do Not Archive -----Original Message----- From: owner-aeroelectric-list-server@matronics.com [mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Doug Ilg Sent: Wednesday, July 07, 2010 2:11 PM Subject: Re: AeroElectric-List: Lithium Battery Option As far as I know, the granddaddy of alllithium battery uses is the Tesla Roadster. Of course, they run the entire car on the battery, so it's a very different beast. I do know, though, that they get their batteries made by Panasonic. Given that, I'd say it's a very good bet that Panasonic makes the best lithium batteries available. Cost is not a huge issue for a $110K car, so they weren't scrimping. May be worth looking into. You might be able to assemble your own from Panasonic parts. Hey, we're experimentals, right? Doug Ilg Grumman Tiger N74818, College ParkAirport (KCGS), Maryland Challenger II LSS LW (N641LGreserved)- kit underway at Laurel Suburban (W18) ________________________________ Message 7 _____________________________________ Time: 01:18:34 PM PST US Subject: AeroElectric-List: Re: Lithium Battery Option From: "rparigoris" A while back Bill Dube mentioned he was offering a A-123 cell battery for aircraft use. Ron P. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=304079#304079 ________________________________ Message 8 _____________________________________ Time: 01:19:56 PM PST US Subject: AeroElectric-List: Dynon D10A sound From: "rparigoris" I have a Dynon D10A with a homemade AOA and PS PMA4000 audio panel with unswitched audio inputs. For those who have tried, is it worth it hooking up D10A audio to audio panel? Thx. Ron Parigoris Read this topic online here: http://forums.matronics.com/viewtopic.php?p=304080#304080 ________________________________ Message 9 _____________________________________ Time: 01:37:17 PM PST US From: Werner Schneider Subject: Re: AeroElectric-List: Dynon D10A sound If you have an AoA which works yes, it gives you a nice alert! br Wrener On 07.07.2010 22:16, rparigoris wrote: > --> AeroElectric-List message posted by: "rparigoris" > > I have a Dynon D10A with a homemade AOA and PS PMA4000 audio panel with unswitched audio inputs. > > For those who have tried, is it worth it hooking up D10A audio to audio panel? > > Thx. > Ron Parigoris > > > Read this topic online here: > > http://forums.matronics.com/viewtopic.php?p=304080#304080 > > ________________________________ Message 10 ____________________________________ Time: 02:49:49 PM PST US Subject: AeroElectric-List: Re: Lithium Battery Option From: "N38CW" Yep, it's a bit pricey... http://www.motorauthority.com/blog/1039902_porsches-1700-starter-battery-option-for-boxster-spyder-911-gt3 -------- Bill Settle RV-8 Fuselage Read this topic online here: http://forums.matronics.com/viewtopic.php?p=304092#304092 ________________________________ Message 11 ____________________________________ Time: 02:56:51 PM PST US From: "Roger" Subject: Re: AeroElectric-List: Panel punch > Does anyone on the list have a 3 1/8" panel punch that you might be > willing > to loan out? I have a set of Greenly Punches but do not have one this > large. I need to punch about 3 instrument holes in my panel and I feel > the > punch is the best way to go. The panel is light gauge aluminum, so will > be > very easy to punch. I have considered using a hole saw, but I have never > been able to make a nice clean hole with this method. > > Any help would be appreciated. > > Roger Curtis > Upton, MA > I have one you would be welcome to borrow. 3-1/8 on one side, 2-1/4 on > the > other. Kind of heavy but maybe one of those "if it fits it ships" USPS > boxes wouldn't be too much. > > Allen Fulmer > Alexander City, AL 35010 Allen, Thank you for the loan of your punch. I can't immagine, short of setting the panel up on a milling machine, making instrument holes as nice, smooth, round, easy, and precisely placed, as can be accomplished with the simple punch. This is what it is all about, "Builders helping Builders" Great forum! Roger ________________________________ Message 12 ____________________________________ Time: 03:29:17 PM PST US Subject: RE: AeroElectric-List: Re: Lithium Battery Option From: "Jon Finley" =0AIf my math is right, that works out to $77.00/pound. Not quite up to th e rumored $100,000/pound that Formula 1 is willing to pay but still out of my budget.... :-(=0A =0AJon=0A=0A-----Original Message-----=0AFrom: "N38CW " =0ASent: Wednesday, July 7, 2010 3:47pm=0ATo: a eroelectric-list@matronics.com=0ASubject: AeroElectric-List: Re: Lithium Ba tle@bellsouth.net>=0A=0AYep, it's a bit pricey...=0A=0Ahttp://www.motorauth ority.com/blog/1039902_porsches-1700-starter-battery-option-for-boxster-spy der-911-gt3=0A=0A--------=0ABill Settle=0ARV-8 Fuselage=0A=0A=0A=0A=0ARead this topic online here:=0A=0Ahttp://forums.matronics.com/viewtopic.php?p= =========0A=0A=0A=0A ________________________________ Message 13 ____________________________________ Time: 03:35:16 PM PST US Subject: Re: AeroElectric-List: Dynon D10A sound From: rparigor@suffolk.lib.ny.us "If you have an AoA which works yes, it gives you a nice alert!" Thx. Werner Ron Parigoris ________________________________ Message 14 ____________________________________ Time: 03:48:19 PM PST US From: Ken Subject: Re: AeroElectric-List: Re: Heat Sink necessary? It is sometimes good to imagine what can go wrong. Generally high impedance injectors run around 12 ohms resistance. If one or more injector driver fails on, the engine will likely keep running unless subsequently a fuse pops or a diode fails due to the extra current. I'd consider making sure the diode had some heat sinking and was capable of feeding all six injectors at 100% duty cycle which is likely 7+ amps at 14+ volts. Ken Robert L. Nuckolls, III wrote: > > > At 11:29 AM 7/7/2010, you wrote: >> >> >> Glen and Bob, Thanks. >> >> I used a .063 alum washer for a stand-off from my composite structure >> which allows air to the metal backside of the rectifier. I will add a >> larger surface area piece of alum w/recommended grease. > > Okay, recommend something on the order of 10 square inches > of .062 aluminum. If you wanted to make it "tighter" on > real-estate, you could bend the edges up so that the > diode still sits on a flat spot, but the overall width > is reduced. > >> The injectors are 55#/hr and my 6 cyl engine, with a bsfc of .55 >> lbs./hr/hp, will have a max fuel consumption of 132 lbs/hr so these >> injectors will only see a 40% duty cycle. At 75% they draw 9W each or >> 54 W, so my normal ops should draw about 2.5 amps. So my initial >> guess of 6a is too high. The 10 amp circuit recommended by the EFI >> mfgr is to cover all the bases including low voltage and higher power >> than my engine makes. > > Hmmmm . . . maybe you don't need to do anything with > the diode. Wait until you're able to run the engine > and take some measurements of your own. It sounds > like it might be just fine with zero-heat sink. > > > Bob . . . > ________________________________ Message 15 ____________________________________ Time: 07:29:16 PM PST US From: "Robert L. Nuckolls, III" Subject: Re: AeroElectric-List: Re: Heat Sink necessary? At 05:47 PM 7/7/2010, you wrote: > >It is sometimes good to imagine what can go wrong. Generally high >impedance injectors run around 12 ohms resistance. If one or more >injector driver fails on, the engine will likely keep running unless >subsequently a fuse pops or a diode fails due to the extra current. >I'd consider making sure the diode had some heat sinking and was >capable of feeding all six injectors at 100% duty cycle which is >likely 7+ amps at 14+ volts. Would that not be a multiple failure scenario? . . . and would the engine run with 5 of the 6 injectors turned on hard? Bob . . . ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message aeroelectric-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/AeroElectric-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/aeroelectric-list Browse Digests http://www.matronics.com/digest/aeroelectric-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.