Fairchild Club Forum

--- 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?
>

>
> 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?
> >
>

--- In fairchildclub@yahoogroups.com, "m51rs" wrote:
>
> Bob, the plane was lightly loaded.Only me,(160 lbs) and 1/3 tanks.I
> was climbing pretty steep.70-75 mph.
>
> Carb is clean inside.
>
> BTW,during level flight this problem did not occur.
>
> I can try again with more fuel and more speed to see if this
helps..If
> you think it is worth the try.
>
> You also speak about a void which you try to never let happen.Could
> you please explain this for me?How and why?
>
> Thanks,
>
> Remko
>
>
>
> --- In fairchildclub@yahoogroups.com, "rangerrobertmn"
> wrote:
> >
> > 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?
> > >
> >
>

--- In fairchildclub@yahoogroups.com, "m51rs" wrote:
>
> Bob, the plane was lightly loaded.Only me,(160 lbs) and 1/3 tanks.I
> was climbing pretty steep.70-75 mph.
>
> Carb is clean inside.
>
> BTW,during level flight this problem did not occur.
>
> I can try again with more fuel and more speed to see if this
helps..If
> you think it is worth the try.
>
> You also speak about a void which you try to never let happen.Could
> you please explain this for me?How and why?
>
> Thanks,
>
> Remko
>
>
>
> --- In fairchildclub@yahoogroups.com, "rangerrobertmn"
> wrote:
> >
> > 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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--- In fairchildclub@yahoogroups.com, "Tom Mueller" wrote:
>
> Remko,
> Just a thought, I had a similar problem some time ago.
> More of an occasional engine stumble when I pulled the nose up and
> gave it power to gain altitude. My Stromberg was looking pretty sad
> at that time, so I sent it off for a rebuild. The shop said it was a
> Carb off a different type Ranger engine than mine. A Ranger with a
> mechanically drive fuel pump. Like a PT 19. On the identification
> plate on the carb it was clearly stamped 3 lbs psi which according
> to the over hauler should only be 1 lbs psi type if installed on a
> gravity fed Fairchild. The carb was rebuilt to 1 lb specifications
> which does change the float/fuel level. The rebuilder said a Stromberg
> off a Ranger with a engine drive fuel pump will work on F-24, but if
> the circumstances where just right, it could run lean because of
> different fuel levels in the float bowl. .I've experienced no further
> problems. Your fuel flow readings appear adequate.
> Tom
> Hanford,Ca
>

--- In fairchildclub@yahoogroups.com, "Tom Mueller" wrote:
>
> I had mine done by Aircraft Systems Inc. I didn't do much shopping
> around. I just wanted to go fly. They were kind of pricey as I recall,
> around $700 bucks, but their knowledge and workmanship with vintage
> aircraft Carburetors was superior.
> Tom
>
> Aircraft Systems Inc.
> 5187 Falcon Rd.
> Rockford, IL 61109
> (815) 399-0225
>