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Subject: Re: [FlyRotary] Intermittent fuel pressure loss
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From: Tracy <rwstracy@gmail.com>
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Date: Mon, 27 May 2013 14:44:29 -0400
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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I had almost the exact same experience on two occasions.  First time it was a=
 clogged gascolator.   Turning on the backup pump made enough pressure acros=
s the filter disk in it to cause it to fold up and pass gas around the scree=
n.

Second time it was a clogged pre pump filter.   Did not try second pump but f=
ound that if I backed off the throttle engine recovered.   Less power =3D le=
ss fuel needed so fuel pressure recovered.   Did you try backing off the thr=
ottle?   That has saved my butt on many occasions in many scenarios.

Tracy

Sent from my iPad

On May 27, 2013, at 10:09, "Bill Bradburry" <bbradburry@bellsouth.net> wrote=
:

> Has anyone had an instance of intermittent failure of the fuel pumps?  A
> couple of days ago the engine started to intermittently lose power and
> changed tanks. (both tanks were low, about 5 gal in right and 10 or so in
> left)  The problem stopped so I thought I had unported the right tank.
> Several minutes later it started again on the left tank and I turned on th=
e
> other fuel pump.  That seemed to stop it again.  I still suspected that I
> had unported the tanks.
>=20
> A couple of days later, I took off with about 45 gal and after about a 30
> min flight, the engine lost power again twice.  I turned the other fuel pu=
mp
> on and the problem stopped.
>=20
> My fuel system goes thru a Gascolator then to the two pumps, then to a fue=
l
> filter.  I assume that the Gascolator or the fuel filter could be getting
> clogged, but I don't think that the other pump would bring the pressure ba=
ck
> if that were the case.  I only have about 70 flight hours on the pump and
> maybe about 100 hours total including ground runs.
>=20
> Also on the flight back, I had both pumps on and showing 40 lbs of pressur=
e.
> I then turned the secondary pump off and the pressure held at 40 lbs.  Thi=
s
> strikes me that it is an intermittent pump failure.  I plan to clean the
> Gascolator, replace the fuel filter, and replace the pump.
>=20
> Any thoughts, suggestions, experiences? =20
>=20
> My wife was with me on the last incident and I don't think she is interest=
ed
> in trying to join Ed's glider club!
>=20
> Bill B
>=20
>=20
> --
> Homepage:  http://www.flyrotary.com/
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