Re: fuel flow
Posted: Wed Jul 04, 2007 6:38 pm
'Of course when I talk about flying a Fairchild 24W, I am nearly talking ancient history on the practical, and recent on some of the physical.
I noticed that in the distant past, someone had routed the fuel lines over the top of the front wing attachment fittings before entering the cabin.... Bad idea, it can trap alot of air in the lines. Being a devils advocate, are all four screens at each of the wing tank outlets clean, all four lines in good condition, including the interconnecting hoses? And last but far from least, are the vent holes in your gas caps clean?.
I should be working on my 24 right now, but it is only about 106 F. I can't see to be able to drink water fast enough to keep up with the heat.
I noticed that in the distant past, someone had routed the fuel lines over the top of the front wing attachment fittings before entering the cabin.... Bad idea, it can trap alot of air in the lines. Being a devils advocate, are all four screens at each of the wing tank outlets clean, all four lines in good condition, including the interconnecting hoses? And last but far from least, are the vent holes in your gas caps clean?.
I should be working on my 24 right now, but it is only about 106 F. I can't see to be able to drink water fast enough to keep up with the heat.
'----- Original Message -----
From: rangerrobertmn
To: fairchildclub@yahoogroups.com
Sent: Monday, July 02, 2007 12:48 PM
Subject: [fairchildclub] Re: fuel flow
Remko,
In FLIGHT attitude, the Fairchild 24 has about 3 p.s.i. pressure at
the carb. In TAKEOFF attitude, there is less pressure. You don't
mention how steep you are climbing. At anything less than 70 mph,
you are getting pretty steep. You also don't mention whether the
tanks are full. Half full tanks at steep attitude don't provide
much pressure at the carb.
That said, I suspect that you have a carb problem, not a fuel flow
problem. The only fuel flow problem that I have, occurs when some
fuel has leaked out past the needle valve, leaving a void in the
fuel line. This void generally hits the carb all at once, and I get
a 'heck of a surge', to the point where I try to NEVER let it happen.
Bob Waldron
1939 Fairchild 24 K 200hp
Stillwater MN
--- In fairchildclub@yahoogroups.com, "m51rs" wrote:
>
> I checked the fuelflow on both tanks at the carburetor side of the
> fuel line.
> Left tank:170 liters or app 37 gallons an hour
> right tank 150 liters or app 33 gallons an hour
>
> During take off at full power my engine surges.Less power cures the
> problem.I tried leaning the mixture,flying on both tanks,but to no
avail.
>
> Any ideas out there?
>
> Filters inside the carb and strainer are absolutely clean.
>
> Thanks for any help.
>
> Remko
>
> PS:the other engine in our f24 had a fuelpump installed.Could this
be
> a hint?
>
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