AeroElectric-List Digest Archive

Sat 09/22/07


Total Messages Posted: 6



Today's Message Index:
----------------------
 
     1. 08:12 AM - electric dependant engine configuration (Ernest Christley)
     2. 08:15 AM - Re: EFIS as only reference???EFIS as only reference???EFIS... (Ernest Christley)
     3. 08:17 AM - Re: EFIS as only reference???EFIS as only reference???EFIS as only reference??? (Ernest Christley)
     4. 08:25 AM - P-mag wiring (John Goldsmith)
     5. 09:18 AM - Re: P-mag wiring (Michael T. Ice)
     6. 04:31 PM - RV electrical system for review (Matt Burch)
 
 
 


Message 1


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    Time: 08:12:52 AM PST US
    From: Ernest Christley <echristley@nc.rr.com>
    Subject: electric dependant engine configuration
    David M. wrote: > > Just curious, but why is it so important to have 2 plugs per > cylinder? The Lycosaurs and etc only have 2 per cylinder because of > the jug size. One plug alone in those engines is not enough to light > the fuel evenly regardless of swirl pattern so that's why they went to > 2 per. My wife's brand new motorcycle has 2 plugs per for the same > reason: jug size. :) > Mainly because the rotary's chamber is not cylindrical. It more "moon" shaped. The second plug was added by Mazda for emissions control at idle. At speed, the engine will run on just the leading plug without a noticeable change in performance. It will run on just the trailing with a 30% decrease in performance and increase exhaust temperature. Mazda did not mean for the engine to be run this way. Neither do I. But if I have to some day, I'll be glad to have the option.


    Message 2


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    Time: 08:15:11 AM PST US
    From: Ernest Christley <echristley@nc.rr.com>
    Subject: Re: EFIS as only reference???EFIS as only reference???EFIS...
    Peter, Bob just answered for me better than I ever could have. For me, this provides redundancy where I loose the injectors, injector controller or the electron pump. I will be able to switch off the fuel pump (a 6A load) to conserve battery. BobsV35B@aol.com wrote: > > > Good Evening Peter, > > Once upon a time in a land far, far, away, I knew a fella that fitted a "T" > fitting in the outlet of his left fuel tank on a Cessna 170. From that > fitting he ran a one eighth inch hunk of brass tubing to a small needle valve > mounted on the instrument panel. From that valve to the throat of the stock > Marvel Schebler carburetor he ran another hunk of brass tubing. Not sure about the > size of the tubing and fitting used here. That was inserted into a stock > fitting that was screwed into the side of the throat of the carburetor. > > My recollection fails me here, but I believe he had bored a hole just above > the throttle valve plate to accommodate the fuel fitting. Not sure though. > > In any case, he could turn the fuel valve to off, turn on the needle valve, > adjust the throttle plate and get a rather nice smooth running engine. He had > added that extra fuel source after having had a stock gascolator get plugged > with crud such that no fuel was available to the engine from either fuel > cell. > > Strictly illegal, but pretty neat! > > Happy Skies, > > Old Bob > AKA > Bob Siegfried > Ancient Aviator > Stearman N3977A > Brookeridge Air Park LL22 > Downers Grove, IL 60516 > 630 985-8503 > > > In a message dated 9/21/2007 6:23:14 P.M. Central Daylight Time, > peterjfharris@bigpond.com writes: > > Ernest, > Your set up sounds good. I am interested in your manual valve back up and > would be happy for any details. I looked at the possibility of using a > carburetor as a throttle body but gave up with the aerocarb because it jams. > A suitable butterfly carb would be an option but I like your idea. > Peter > > > -- "Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, with chocolate in one hand and wine in the other, loudly proclaiming 'WOO HOO What a Ride!'" --Unknown


    Message 3


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    Time: 08:17:09 AM PST US
    From: Ernest Christley <echristley@nc.rr.com>
    Subject: Re: EFIS as only reference???EFIS as only reference???EFIS
    as only reference??? Peter Harris wrote: > > Ernest, > Your set up sounds good. I am interested in your manual valve back up and > would be happy for any details. I looked at the possibility of using a > carburetor as a throttle body but gave up with the aerocarb because it jams. > A suitable butterfly carb would be an option but I like your idea. > Peter > > Ebay is loaded with throttle bodies suitable for 150-200Hp for around $20 each. Mine is from a BMW.


    Message 4


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    Time: 08:25:58 AM PST US
    From: John Goldsmith <jgold4747@yahoo.com>
    Subject: P-mag wiring
    There was some discussion on this list while Bob was out of town in August about the pros and cons of his wiring approach for P-mags (Figure Z-33) vs. the "factory" approach. Bob, any comments on this matter? (I'm getting very close to needing to make a final decision about this...) John Goldsmith (RV-7A, serious panel planning starting) --------------------------------- Need a vacation? Get great deals to amazing places on Yahoo! Travel.


    Message 5


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    Time: 09:18:23 AM PST US
    From: "Michael T. Ice" <aurbo@ak.net>
    Subject: Re: P-mag wiring
    John, I would be surprised if this response doesn't get deleted. The last couple I have submitted have not been posted. But: Referencing P/E mags I would like to make a comment. The following comments are my opinions. The wiring diagrams in Bob's Z figures don't agree with the way the P/E mag folks say to wire their products. I think it is likely that some of the problems experienced with P/E mags is because they were wired wrong. I suggest that if your going to use P/E mags wire them like Emagair says and follow their directions. Mike ----- Original Message ----- From: John Goldsmith To: aeroelectric-list@matronics.com Sent: Saturday, September 22, 2007 7:25 AM Subject: AeroElectric-List: P-mag wiring There was some discussion on this list while Bob was out of town in August about the pros and cons of his wiring approach for P-mags (Figure Z-33) vs. the "factory" approach. Bob, any comments on this matter? (I'm getting very close to needing to make a final decision about this...) John Goldsmith (RV-7A, serious panel planning starting) to amazing places on Yahoo! Travel.


    Message 6


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    Time: 04:31:23 PM PST US
    From: Matt Burch <mcb@sunflower.com>
    Subject: RV electrical system for review
    Hi all, I've gotten far enough into the design of the electrical system for my RV-7 that I feel like it's ready for others to take a look at it. It is a fairly faithful adaptation of Figure Z-13/20, with a few changes. I've combined the schematics with a writeup containing a high level description of the architecture and design goals, and notes on specific choices I made in laying it out, and posted it all as a PDF file on my website: http://www.rv7blog.com/files/20070922_electrical_system.pdf If any of you experts have a chance to look it over and offer any comments or criticism, I'd sure appreciate it. If you see something that doesn't make sense in the diagrams or description, let me know and I'll try to explain what I was thinking. thanks, - Matt Burch http://www.rv7blog.com




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