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Finger Strainers

 
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ptiller(at)lolacars.com
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PostPosted: Sat Feb 23, 2008 9:22 am    Post subject: Finger Strainers Reply with quote
Hi,

I'm soon going to be making my coarse finger fuel strainers and wondered if anyone had any comments on these or if they had made any changes.

I've done a search and there's a few comments but nothing else. I'm assuming that everyone is pretty happy with them and if that's the case I'll go ahead and make and fit them.

Thanks,

Phil
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josok-e(at)ukolo.fi
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PostPosted: Sat Feb 23, 2008 10:04 am    Post subject: Finger Strainers Reply with quote
Hi Phil,

Sorry for the long story that follows Smile
One of the messages mentioning finger strainers was from Bob Harrison. He had a forced landing once, because the strainers were blocked by debris and dog hair. At the time i read that message, i was sure there would not be any hair in my tank. However, a bit later i noticed a dog hair on the outside of the tank, still in the unmounted cockpit module. The dog had never been in the workshop. But the tank is so static, that it pulled the hair from my clothes. Carefully cleaning the tank, i collected quite a lot of everything, including a lot of lint, from the surface. That made me think about the usefulness of these strainers, since there would be gascolator downstream anyway. They will keep small pebbles and peas from blocking the fuel lines upstream of the gascolater, and will be blocked by anything like lint. I do not expect much peas entering the tank. Peas and pebbles are not static. Inspecting the finger restrainers on a regular bases is so difficult, that it will probably
lead to no inspection ever. Hence there are no restrainers on my bird. But then i am not handicapped by PFA.

Regards,

Jos Okhuijsen
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craigb(at)onthenet.com.au
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PostPosted: Sat Feb 23, 2008 12:41 pm    Post subject: Finger Strainers Reply with quote
if you are going the solder option to make them, i wrapped mine around a
piece of alloy tube to form them
soldered them up, slid off the end of the tube about 6mm then just pushed it
point first into the bench
to just close the end up enough to solder that. very quick and easy, then
you can redux them in right away

craig

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ptag.dev(at)tiscali.co.uk
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PostPosted: Sat Feb 23, 2008 1:55 pm    Post subject: Finger Strainers Reply with quote
Hi! Phil /Jos
Didn't see Phils original message however a piece of additional info of
my experience with the gauze type finger strainer was twofold.
a) the gauze actually traps any cloth fibres /long hairs and they dangle
inside the strainer (LIKE IN A WASH BASIN OR Bath Plug hole)
In my case simultaneously the trapped fibres suddenly plugged the exit
holes in both the main tank and reserve.
b) however my situation also highlighted another deficiency in that the
hole drilled in the bottom of the strainers was insufficiently deep to
provide a full intersection orifice with the continuing exit pipe of
the connector.
The aforementioned plug once sucked in just stopped all flow. What's
more back blowing of the fuel doesn't rid you of the plug it merely puts
the plug loose in the tubular gauze to do you a repeat first time you
put full power on.
IF you have the connector standing on the outflow pipe and tilted over
off vertical you can drill out the intersection
Regards
Bob Harrison.

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