<<> Venting to static rather than to pressure isn't an issue>>
It is if you want to give yourself the best possible chance of minimising
vapour lock problems with Mogas. The pressurisation available goes a long
way to cancelling the effects of suction-side head losses (outlet fittings,
elbows, fuel valves, filters, unnecessarily long and narrow fuel lines, etc)
that can easily induce vapour formation.
<<I can tell you that there was no visible indication in flight that the
tank was pulling all of the fuel out of the sight gauge! >>
I've tried that too! Only, as stated, all of the fuel is sucked out of the
fuel sight gauge. My filler is in a slightly higher location than standard
XS, but lower down than Classic.
Duncan McF
----- Original Message -----
From: "Tony Krzyzewski" <tonyk@kaon.co.nz>
Subject: RE: Europa-List: It's not easy when you're stupid
>
>
> >> Who knows what the pressure in the tank will be if the vent is
otherwise
> sited below the fus. aft of the cockpit.
>
> Venting to static rather than to pressure isn't an issue. One of the
Europa demonstrators was fitted with a static vent rather than a pitot vent
to test the prototype of what became my fuel gauge and this showed that it
isn't a problem. There are quite a few Europas now flying without the top
vents and I haven't heard of any problems to date with this configuration.
>
> >> Certainly, if the aft-positioned fuel cap is left off a Europa during
flight
> then there is enough suction in the area of the open filler and therefore
> the tank be able to pull all of the fuel out of the sight gauge.
>
> Having done a 1 hour flight with the fuel cap missing in a top vented
europa (it was still hooked on the filler vents when I landed!), I can tell
you that there was no visible indication in flight that the tank was pulling
all of the fuel out of the sight gauge! Lesson learnt, won't do that again.
:)
>
> Regards
>
> Tony
>
> [Panel powered up, no smoke so far]
>
>
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