I had a flippy vent cover on my savannah. Accidentally hit it with my
shoulder on pre flight and didn't notice. Since it took off at about 30mph
by the time I noticed the lack of airspeed we were almost in the air so I
decided to deal with the problem in the air. I was surprised how easy it
was to fly without airspeed. Uneventful circuit to land.
So flippy covers not for me after that
William Daniell
LONGPORT
+1 786 878 0246
On Tue, May 30, 2023 at 4:11=AFPM rparigoris <rparigor@hotmail.com> w
rote:
>
> Hi Group
>
> A few notes on Fuel Vents:
> ** I owned a 170 that had the flippy pitot and fuel vent covers. I had a
> dapper wasp somehow get into the pitot and the airspeed was dead? Took a
> while to figure out just how. Then one day walking up to the bird when it
> was pretty darn windy, noticed both the pitot and fuel vent flippy covers
> were opened because of the wind! Again it was howling and it both were on
> top of high wing. Anyway noticed a dapper wasp land and crawl into the fu
el
> vent!! Took a few hours to clean out a nest that she built. Even though
> there were 2 holes drilled on the aft side of the fuel vent, it would not
> have helped. I suspect with the Europa being a low wing and my fuel vent
on
> the bottom of fuse, may need more wind that on a high wing to open
> ** As Bud has, we mounted the fuel vent on our Mono on the bottom of the
> fuse. we too have 2 holes drilled aft. We installed a flippy cover:
> https://1drv.ms/f/s!Ah1S270Nwg9VgoFrWgK4zHNaHsxwUg?e=gGz1pO
> You need to copy and paste full URL into browser to view
> ** Am not a big fan of an aeroplane engine (or any other engine as a
> matter of fact) that decides to play silent night when not commanded to d
o
> so. Have been around enough to know that if you don't let air into a fuel
> tank and a vacuum forms, fuel flow slows or stops. Thus we added a second
> fuel tank vent to our Mono that vents inside the cockpit. If one were to
do
> such a thing and just have a opened tube, besides fumes getting into the
> cockpit, when you decide to land turtle and can't get out, fuel can spill
> into cockpit. We installed a fuel rated one way diaphragm valve (white wi
th
> nipples) and in series a Brass fitting with ball check valve. If you go
> inverted, the white diaphragm valve should stop flow, but it's kind of
> important it doesn't leak, so if it were to leak, the check valve should
> stop flow. We also installed a screen filter to keep snakes out. Using a
> clear tube, you can blow into it and try sucking to verify the one way
> diaphragm valve is working. To verify!
> the Brass ball check valve is working, by putting a magnet near it and
> moving, if you hear the ball jiggling, chances are really really good it
> will function as designed. If the fuel vent were to get clogged, it's tru
e
> that pressure could build in the tank, and I'm a lot happier to have some
> pressure in the tank, than a vacuum, just over the trees. Here's some pic
s:
> https://1drv.ms/f/s!Ah1S270Nwg9VgoFsZ5At3nvRBSpDOQ?e=FKXQw4
>
> Ron P.
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=510886#510886
>
>
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