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Re: Europa-List: Vapour lock? Why?

Subject: Re: Europa-List: Vapour lock? Why?
From: Peter Zutrauen <peterz@zutrasoft.com>
Date: Mon, 29 Oct 2012 08:57:37
a second alternative:  http://www.stevesaircraft.com/gascolator.php

not cheap either tho.

Cheers,
Pete

On Mon, Oct 29, 2012 at 8:40 AM, GRAHAM SINGLETON <
grahamsingleton@btinternet.com> wrote:

> Best one is an Andair, not cheap though. The old Mini gascolator is too
> small for a 914, GAS375 would be the one
>
> Graham
>
>   ------------------------------
> *From:* William Daniell <wdaniell.longport@gmail.com>
> *To:* europa-list@matronics.com
> *Sent:* Monday, 29 October 2012, 11:31
> *Subject:* RE: Europa-List: Vapour lock? Why?
>
> I plumbed those in ' following the book ' but I see they are probably
 not
> the ideal.
> So what=92s the most common solution?
> Will
>
> *From:* owner-europa-list-server@matronics.com [mailto:
> owner-europa-list-server@matronics.com] *On Behalf Of *GRAHAM SINGLETON
> *Sent:* 29 October 2012 05:29
> *To:* europa-list@matronics.com
> *Subject:* Re: Europa-List: Vapour lock? Why?
>
> Nigel
> another problem with those filters is that sometimes they look clean but
> aren't because the contamination is translucent when wet with fuel; so,
> more restriction.
> You're right, they are too small. quite high fuel flow with a 914.
> Graham
>
> ------------------------------
> *From:* "nigel_graham@m-tecque.co.uk" <nigel_graham@m-tecque.co.uk>
> *To:* europa-list@matronics.com
> *Sent:* Monday, 29 October 2012, 10:01
> *Subject:* Re: Europa-List: Vapour lock? Why?
>
>
> On 31/07/2012 22:27, klinefelter.kevin@gmail.com wrote:
>
>
> Snip ....
>
> *.....I was chatting with Rob Seaton ( of Rotech in canada). He said he
> learned how too small a fuel line and/or tortured routing can cause
> "cavitation" at the pumps. So maybe your fuel filter(s), on the suction
> side of the pump,are causing cavitation in the pump(s). Maybe due to the
> size (restriction of flow) of the filter, even if they are clean.*
> *........ Snip*
>
> Kevin, I think Rob Seaton may be on the money with this one.
> A year or so back, I experienced a dead cut while flying a friend's 914
> powered Europa on a hot day. Nifty application of fuel pump restored the
> noise, but once safely back on the ground, I checked the filters (all
> clean). This aircraft was fitted with Europa specified Purolator glass
> shrouded filters that allow you to see the fuel flowing. At low RPM, the
> filter appeared full, but as power was increased, the filter began to fil
l
> with what I thought was air. My first action was to check the pipework an
d
> security of connections - but everything seemed fine - it was definitely
> not drawing in air from anywhere. I then concluded that I had experienced
> vapour lock and left it at that.
>
> Curiosity got the better of me and I started researching cavitation and
> stumbled upon this very stilted, but interesting presentation on Youtube.
> Take a look at the first minute from 00.20 - in particular, the glass
> venturi. This was exactly what I saw in the Purolator filters.
>
> http://www.youtube.com/watch?v=K_w3gcvA87I
>
> My conclusion is that the Purolator filter has the correct mesh size to
> trap contaminants, but the filter capacity is too small and creates a
> pressure drop in the fuel line.
>
> Nigel
>
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