REFLECTOR: Franklin Magneto/inspection/priming questions
Laurence Coen
lwcoen at hotmail.com
Mon Aug 3 20:12:45 CDT 2009
John,
I tried to help you, Mike Watson tried to help you but now I think you are
beyond help.
Larry
--------------------------------------------------
From: "John Dibble" <aminetech at bluefrog.com>
Sent: Monday, August 03, 2009 7:40 PM
To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
Subject: Re: REFLECTOR: Franklin Magneto/inspection/priming questions
> I think I might try using the primer while the engine is cranking, unless
> there is a
> reason not to.
>
> John
>
> Laurence Coen wrote:
>
>> John,
>>
>> I've never had a no-start. Your description of raw gas flowing out the
>> induction would indicate to me that your primer has no nozzle and dumps a
>> solid stream of fuel into the manifold. There are two things wrong with
>> that, if that is the case. First you will dump a lot of fuel in a very
>> short time making it difficult to do it right. Second, liquid fuel
>> doesn't
>> burn but vapors do. A nozzle both meters the fuel and atomizes it which
>> improves vaporization. If you have a 1/8" pipe fitting into the manifold
>> with no nozzle then that is your problem, not location.
>>
>> Raw fuel running out of the induction system has been the cause of quite
>> a
>> number of engine fires on start-up.
>>
>> Larry Coen
>> N136LC
>>
>> --------------------------------------------------
>> From: "John Dibble" <aminetech at bluefrog.com>
>> Sent: Sunday, August 02, 2009 10:55 AM
>> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>> Subject: Re: REFLECTOR: Franklin Magneto/inspection/priming questions
>>
>> > Larry,
>> > I have a similar prime setup. Have you ever primed and not started?
>> > Mine
>> > is connected
>> > to the front primer port and the fuel will pour out the carb if I do
>> > not
>> > start
>> > imediately. I'm considering moving it to the middle or rear port, but
>> > want to know if
>> > it will do any good.
>> >
>> > John
>> >
>> > Laurence Coen wrote:
>> >
>> >> Jeff,
>> >>
>> >> I too have a Goodman engine that sat for about five years. It sounds
>> >> like
>> >> you took good care of it while it was in storage so I don't think you
>> >> need
>> >> to do much but put in fresh oil and fire it up. That is what I did
>> >> and
>> >> three years later it is running fine with compressions running 79/80.
>> >>
>> >> Priming is something you will need. Priming by pumping the throttle
>> >> with
>> >> an
>> >> updraft carb is an engine fire waiting to happen. There are primer
>> >> manifolds that mount on the bottom of the intake manifolds but they're
>> >> pricey. I built my own primer system that works very well. I
>> >> pressurize
>> >> the fuel system with the electric pump and have a solenoid valve that
>> >> is
>> >> operated with push button on the panel. I inject fuel into the center
>> >> primer ports on both sides of the engine. I made my own injectors
>> >> from
>> >> 1/8"
>> >> flare to 1/8" pipe elbows. The injector nozzle is a brass screw
>> >> threaded
>> >> into the elbow and center drilled with a #60 drill. Two to five
>> >> seconds
>> >> prime, depending on temp, does the job.
>> >>
>> >> Larry Coen
>> >> N136LC
>> >> SE/RG Franklin/IVO
>> >>
>> >> --------------------------------------------------
>> >> From: "Jeff Clough" <jclough48 at comcast.net>
>> >> Sent: Thursday, July 30, 2009 8:23 AM
>> >> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
>> >> Subject: REFLECTOR: Franklin Magneto/inspection/priming questions
>> >>
>> >> > FINALLY getting around to hooking up my Franklin engine to hopefully
>> >> > test fire it soon......a few questions:
>> >> > 1: I have Rose dual ignition....am planning on using 1/2 of this
>> >> > set
>> >> > up for one set of spark plugs and a magneto for the other set of
>> >> > plugs....what magneto are others using and where can I
>> >> > get
>> >> > one????
>> >> > 2: How did others route/support their ignition wires through/under
>> >> > the
>> >> > Franklin plenum....got any pictures you can send to me off Reflector
>> >> > ??
>> >> > 3: I purchased my engine new from Pat Goodman back in about 1997 (I
>> >> > think).....He had test run it, but it has not been run since then.
>> >> > I
>> >> > removed the plugs and put oil in the cylinders several
>> >> > time
>> >> > over the ensuing years , the engine has been in a hangar here in DRY
>> >> > Colorado or in my heated garage in Alaska in the subsequent
>> >> > years....should it be inspected or have gaskets replaced etc???? I
>> >> > think there are some Franklin pros in Ft Collins CO (about 1 hour
>> >> > away)...should I pull the engine off (again) and take it to
>> >> > them
>> >> > for inspection/servicing or should I run it for a while on my
>> >> > airframe
>> >> > (break it in on my airframe while on the
>> >> > ground
>> >> > and then (perhaps?) have it inspected/serviced ??
>> >> > 4: I currently DO NOT have a priming system......is it necessary
>> >> > to
>> >> > have one or will the engine start w/out it just by cranking a bit
>> >> > longer??? If I need a priming system , is there a
>> >> > packaged
>> >> > system available??
>> >> >
>> >> > Thanx for all your input(s) Jeff C Brighton CO 173RG
>> >> > Clamshell IVO Franklin
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