---------------------------------------------------------- RV10-List Digest Archive --- Total Messages Posted Wed 12/27/17: 3 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:55 AM - Re: Alternator will not put out current (John MacCallum) 2. 09:38 AM - Re: Alternator will not put out current (John Miller) 3. 04:55 PM - Re: Overhead Console (Greg McFarlane) ________________________________ Message 1 _____________________________________ Time: 12:55:07 AM PST US From: "John MacCallum" Subject: RE: RV10-List: Alternator will not put out current I am not familiar with that Alternator. You say you have two wires running to the connector both with 12 volts? Can you upload a photo of the wiring diagram for the Alternator? Also you will always have Battery Volts on the B + terminal whenever the Master is on unless you have a big Diode in line with the Battery. Cheers John MacCallum VH-DUU RV 10 # 41016 From: owner-rv10-list-server@matronics.com [mailto:owner-rv10-list-server@matronics.com] On Behalf Of John Miller Sent: Sunday, 24 December 2017 2:53 PM Subject: RV10-List: Alternator will not put out current Fellow RV10 guys. I am ready to fly the RV8 I have been building for the past 5 years, but I have an alternator issue maybe one of you can help with. The alternator I have installed is an Ultima (with internal voltage regulator) from O=99Reilly=99s auto parts store. My next door hangar mate has an RV7 with the same alternator setup. When I did my first ground engine run on Thursday, all worked fine except the alternator would not put out voltage. I double checked my connector plug wiring against my hangar mate's, and and made my connector wiring exactly the same as his is. Then I confirmed that I had 12v (with alt field switch on) to each of the 2 connectors in the plug, plugged it into the alternator, and ran engine again but no voltage increase with the alt field switch on. With the alt field switch, there is no voltage to the connector, but there is batt voltage showing at the alternator output wire with the batt switch on. Friday, I pulled the alternator off and took it back to O=99Reilly=99s. It bench checked ok on their alternator tester. I also confirmed on their tester that the 2 connectors had 12v to them - it did. Then I had them order a new alternator anyway and it bench checked ok before I left the store.. Put the new alternator on this am. Ops checked it this afternoon with an engine run and also ran a temp lead from the alternator output connector to a voltmeter. The alternator output never went above the battery voltage of 12.7v with the alt field switch on. Thinking it might be the connector plug that plugs into the back of the alternator, I changed out that plug for an older one I had with the original Denso alternator I had on my RV10. I confirmed that I had 12v to the 2 connectors with alt field switch on and ran the engine again - no voltage increase again! I am at wits end trying to get the alternator to put out voltage when the engine is runningany of you have suggestions? Thanks - Grumpy N184JM ________________________________ Message 2 _____________________________________ Time: 09:38:41 AM PST US From: John Miller Subject: Re: RV10-List: Alternator will not put out current Fellow RV10ers - thanks all for the tips. Found the issue and will post for all to see. On suggestion from one of the avionics dealers at Osh, they convinced my partner last summer that we needed to have over-voltage protection on the alternator to protect avionics. So we bought one of the small crow-bar types from PlanePower and installed per their instructions between the circuit breaker and the alt field switch. I chased ghosts for several days. Could always get 12v on the field wire to the rear of the alternator.but that was not telling the whole story. I needed to see if it was supplying enough amps to excite the alt field. With the help of a local A&P, we jumped the alt field wire to the connector prong on the rear of the alternator, then measured volts at the alternator.should have been 12v..less than 1v! That led me back to something in the wiring must be allowing 12v voltage to pass, but no amps to flow. Then I remembered the over-voltage protection module I installed, and removed it from the wiring. Bingo! Got a good 12v at the alternator connection followed by a good engine run with alternator putting out 14.5v into the system! I then checked with Christer at SteinAir (who built an RV8 a couple of years back). He told me this: 1. He does not have such a device on his main alternator 2. He does have one on his little backup alternator mounted on the vacuum pad 3. All the Garmin products are rated for up to 30v, so he doesn=99t see a need for one if you are using Garmin stuff (did not discuss Dynon stuff) 4. Set the voltage warning to 15v to warn you if the alternator starts to run away (I also set my amp warning flags as well) So, now all is ready for first flight - hopefully tomorrow when the cold and winds let up some here in TN. grumpy N184JM > On Dec 27, 2017, at 2:54 AM, John MacCallum wrote: > > I am not familiar with that Alternator. You say you have two wires running to the connector both with 12 volts? Can you upload a photo of the wiring diagram for the Alternator? > Also you will always have Battery Volts on the B + terminal whenever the Master is on unless you have a big Diode in line with the Battery. > > > Cheers > > John MacCallum > VH-DUU > RV 10 # 41016 > > > > From: owner-rv10-list-server@matronics.com [mailto:owner-rv10-list-server@matronics.com ] On Behalf Of John Miller > Sent: Sunday, 24 December 2017 2:53 PM > To: rv10-list@matronics.com > Subject: RV10-List: Alternator will not put out current > > Fellow RV10 guys. > > I am ready to fly the RV8 I have been building for the past 5 years, but I have an alternator issue maybe one of you can help with. > > The alternator I have installed is an Ultima (with internal voltage regulator) from O=99Reilly=99s auto parts store. My next door hangar mate has an RV7 with the same alternator setup. > > When I did my first ground engine run on Thursday, all worked fine except the alternator would not put out voltage. > > I double checked my connector plug wiring against my hangar mate's, and and made my connector wiring exactly the same as his is. Then I confirmed that I had 12v (with alt field switch on) to each of the 2 connectors in the plug, plugged it into the alternator, and ran engine again but no voltage increase with the alt field switch on. > > With the alt field switch, there is no voltage to the connector, but there is batt voltage showing at the alternator output wire with the batt switch on. > > Friday, I pulled the alternator off and took it back to O=99Reilly=99s. It bench checked ok on their alternator tester. I also confirmed on their tester that the 2 connectors had 12v to them - it did. Then I had them order a new alternator anyway and it bench checked ok before I left the store.. > > Put the new alternator on this am. Ops checked it this afternoon with an engine run and also ran a temp lead from the alternator output connector to a voltmeter. The alternator output never went above the battery voltage of 12.7v with the alt field switch on. > > Thinking it might be the connector plug that plugs into the back of the alternator, I changed out that plug for an older one I had with the original Denso alternator I had on my RV10. I confirmed that I had 12v to the 2 connectors with alt field switch on and ran the engine again - no voltage increase again! > > I am at wits end trying to get the alternator to put out voltage when the engine is runningany of you have suggestions? > > Thanks - Grumpy > N184JM ________________________________ Message 3 _____________________________________ Time: 04:55:55 PM PST US Subject: RV10-List: Re: Overhead Console From: "Greg McFarlane" Why not build your own ? 023 Ally is good to go with. Just make up side template out of cardboard/mdf ply etc for full length, windscreen to baggage, then make the whole thing from three pieces, sides and vent/lights etc surface. Small lugs bent and pop rivets will hold it altogether and attach, then a sealing/strengthening glass tape can be used on the joins. Your choice of headlining makes it your own. Happy to give more info if needed. grbcmcfarlane@gmail.com Cheers from Western Australia Read this topic online here: http://forums.matronics.com/viewtopic.php?p=476825#476825 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message rv10-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/RV10-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/rv10-list Browse Digests http://www.matronics.com/digest/rv10-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.