When I first got my Avid MK IV=2C I put filters on both sides between the w
ing tanks and the header tank. All was fine for a while (about 10-15 hrs)
till one evening I took off from my strip and as I climbed out and got to 4
50'=2C the engine started to miss and spit. I ended up landing in a neighb
ors field with no dammage to me or the plane. What had happened I found ou
t the next day=2C was the filter on the tank I was using started to plug ju
st a bit and so the flow was reduced. The engine never did die=2C but woul
d not run up above about 4000 rpm. Durring the takeoff=2C it was turning u
p about 6200=2C and when the small header tank was emptied=2C things got "i
nteresting". I posted this account on the Avid list=2C and Steve Winder=2C
who ran the Avid factory for years said NEVER HAVE FILTERS BETWEEN THE WIN
G TANKS AND THE HEADER TANK. He used all capitol letters also! He said th
at it takes very little to stop or slow the gravity flow=2C and ofcourse th
at is what caused my problem. He also said=2C that the header tank works a
s a gascolator to filter the fuel so the filters between the tanks aren't n
eeded. I had a final filter between the header tank and the fuel pump=2C a
nd so to gaurd against that one plugging and putting me in the trees=2C I p
ut in a T in my fuel line and added a second filter alongside the first one
and then a T back into the fuel line with a small valve to stop the flow t
hrough that filter. When I'm taking off=2C I open that valve and then clos
e it after I get up to 750' or so. If the main filter ever starts to plug
while in flight=2C I will open the valve for the second filter and the fuel
will be able to flow through that one and I will stay out of the trees.
So far that has worked good for me and I still have potentialy three filter
s to stop any crud getting to the carb. The header tank=2C the inline filt
er=2C pluss the backup filter which will only be used if the first inline f
ilter plugs. To each his own=2C but this works for me. I have always used
the Fram paper filters and they have worked good for me.
Take care=2C Jim Chuk
> Subject: Re: Fuel Flow Problems=2C Again! (Vixen=2C Series-5
)
> From: flyboytr@bellsouth.net
> Date: Sun=2C 1 Nov 2009 05:43:45 -0800
> To: kitfox-list@matronics.com
>
>
> Lynn=2C
> ...you get to read a lot of email! [Shocked]
>
> I really don't want to get rid of my filters either. We are still only ta
lking about one filter between a wing tank and the header tank. Once the fu
el is in the header tank it should then benefit from the "suction" of the m
echanical pump.
>
> My last two hurdles are removing the wing tank outlet fitting to check th
e finger strainers and cutting the root rib on the wing so the fuel line do
esn't have to have a hump in it before descending down towards the header t
ank. Thanks again for all your input...always appreciated!
>
> Travis
>
>
> Lynn Matteson wrote:
> > I've read all your posts=2C and all of any mail that comes into my emai
l box....I don't go to the "site".
> >
> > I doubt that the filter element is your problem. I'm keeping all of
> > my filters=2C no matter how much certain engineers might (for me)
> > confuse the issue with talk of surface tension=2C etc.=2C my system flo
ws
> > fuel as long as there's fuel in the system to flow...nudge=2C nudge=2C
> > wink=2C wink. =3B )
> >
> >
> > Lynn Matteson
> > Kitfox IV Speedster=2C taildragger
> > Jabiru 2200=2C #2062=2C 804.3 hrs
> > Countdown to 1000 hrs--196 to go
> > Sensenich 62"x46" Wood prop
> > Electroair direct-fire ignition system
> > Rotec TBI-40 injection
> > Status: flying (and learning)
> >
> >
> >
> >
> >
> >
> > On Oct 31=2C 2009=2C at 11:58 PM=2C FlyboyTR wrote:
> >
> >
> > >
> > >
> > >
> > >
> >
> :D
>
> --------
> Travis Rayner
> Mobile=2C AL
> Skystar Vixen=2C N-789DF
> Continental IO-240=2C Prince P-Tip Prop
> ADI-II Autopilot
> AnyWhereMap Navigation with weather
>
>
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=270420#270420
>
>
>
>
>
>
>
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