REFLECTOR: Franklin Magneto/inspection/priming questions
John Dibble
aminetech at bluefrog.com
Tue Aug 4 14:00:30 CDT 2009
I'll give the short squirt a try. FWIW I tried priming while cranking and it didn't
work at all. Maybe time for vaporization is the key here.
Things in others that annoy you are found in self. Otherwise why would it bother you?
- Edgar Cayce
John
Laurence Coen wrote:
> John,
>
> Sorry about getting short with you but if you blow yourself up, who am I
> going to harass then? In answer to your question, nothing. In fact when I
> first started the engine, I primed for about three seconds and got
> underneath and sniffed the intake and couldn't smell gas. When I cranked
> the engine it fired immediately. It would seem to me that you are dumping
> way too much fuel into the manifold when you prime. You might try a short
> squirt and wait a minute for vaporization and then crank. Just be careful.
>
> Larry Coen
> N136LC
>
> --------------------------------------------------
> From: "John Dibble" <aminetech at bluefrog.com>
> Sent: Tuesday, August 04, 2009 7:50 AM
> To: "Velocity Aircraft Owners and Builders list" <reflector at tvbf.org>
> Subject: Re: REFLECTOR: Franklin Magneto/inspection/priming questions
>
> > Sorry, Larry, I'm not ignoring your advice and will check if I have the
> > spray nozzle
> > and if not, look into installing one. This will take time and given that
> > I have 700
> > hours without incident and know how to avoid fuel flowing out the
> > induction, I have
> > other higher priorities to address first. That said, it seems like
> > priming while the
> > engine is already turning would be an even safer, if not failsafe,
> > procedure that I can
> > use immediately. Since this procedure is not normal, I wanted to solicit
> > comments from
> > the wealth of knowledge on the reflector.
> > I prefer to think of my self as difficult, but not impossible, to help. I
> > am curious
> > to know what you see on the ground below your air intake after priming for
> > 5 seconds
> > without turning the engine.
> >
> > John
> >
> >
> >
> > Laurence Coen wrote:
> >
> >> 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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> >> >>
> >> >> >> ------------------------------------------------------------------------
> >> >> >>
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> >> >> >> Version: 8.0.175 / Virus Database: 270.12.45/2141 - Release Date:
> >> >> >> 5/29/2009 6:28 AM
> >> >> >
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> >> >>
> >> >> Internal Virus Database is out of date.
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> >> >> Version: 8.0.175 / Virus Database: 270.12.45/2141 - Release Date:
> >> >> 5/29/2009 6:28 AM
> >> >
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> >> ------------------------------------------------------------------------
> >>
> >> Internal Virus Database is out of date.
> >> Checked by AVG - http://www.avg.com
> >> Version: 8.0.175 / Virus Database: 270.12.45/2141 - Release Date:
> >> 5/29/2009 6:28 AM
> >
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> ------------------------------------------------------------------------
>
> Internal Virus Database is out of date.
> Checked by AVG - http://www.avg.com
> Version: 8.0.175 / Virus Database: 270.12.45/2141 - Release Date: 5/29/2009 6:28 AM
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