----------------------------------------------------------
                           L29-List Digest Archive
                                      ---
                     Total Messages Posted Wed 05/11/05:1
           ----------------------------------------------------------
 
 
Today's Message Index:
----------------------
 
     1. 12:40 PM - Re: partial power loss  (Jorgen Nielsen)
 
 
 
________________________________  Message 1  _____________________________________


Time: 12:40:49 PM PST US
From: "Jorgen Nielsen" <jorgen.nielsen@mweb.co.za>
Subject: RE: L29-List: partial power loss

--> L29-List message posted by: "Jorgen Nielsen" <jorgen.nielsen@mweb.co.za>

Agree it is not acceleration valve, that is part of unit bypassed by
isolation valve.

Engine about 100 hours remaining.

> -----Original Message-----
> From: owner-l29-list-server@matronics.com 
> [mailto:owner-l29-list-server@matronics.com] On Behalf Of zach mcneill
> Sent: 10 May 2005 04:18 AM
> To: l29-list@matronics.com
> Subject: RE: L29-List: partial power loss
> 
> 
> --> L29-List message posted by: "zach mcneill" <n777ze@comcast.net>
> 
> Do not agree with the acceleration valve.  If isolation valve 
> did not solve problem suspect fuel flow problem.  How many 
> hours are on the airplane?  
> 
> Z
> 
> 
> owner-l29-list-server@matronics.com
> [mailto:owner-l29-list-server@matronics.com] On Behalf Of 
> Ernest Martinez
> To: l29-list@matronics.com
> Subject: Re: L29-List: partial power loss
> 
> --> L29-List message posted by: Ernest Martinez <erniel29@gmail.com>
> 
> Either that or a dirty fuel filter.
> 
> Ernie
> 
> On 5/7/05, Jorgen Nielsen <jorgen.nielsen@mweb.co.za> wrote:
> > --> L29-List message posted by: "Jorgen Nielsen"
> <jorgen.nielsen@mweb.co.za>
> > 
> > Today I experienced partial power loss.  Had work done on 
> the engine, 
> > and took her up for the test flight.
> > 
> > All indications normal, engine run-up OK.  Took off allright, 
> > levelling off downwind all indications still normal but I 
> kept having 
> > this nagging feeling that power was down a bit - based on levelling 
> > off and acceleration in the circuit.  Went to 100%, 
> acceleration was 
> > fine. Turned cross and then onto final for a flypast at 
> 1500ft, seeing 
> > the runway in front could not resist a little dive and "runway 
> > inspection". Was re-cleared by ATC to 1000ft, zoomed up, 
> pushed level, 
> > glance at instruments, 60% on the tacho.  I got the uh-oh feeling.  
> > Confirmed throttle fully forward, closed and re-opened, nothing, 
> > closed throttle, isolation valve on, throttle slowly forward, rpm 
> > started picking up.  By this time I had turned for rwy, called atc, 
> > decided I was too close & high for rwy I had just passed and 
> > positioned for a glide approach to a cross runway.
> > 
> > Engine was surging, I reduced rpm, felt like everything had 
> a 2 second 
> > delay.
> > 
> > Landed fine.  Engine was still running so taxied back.  At idle, 
> > without touching throttle, engine rpm would drop, then 
> surge to 50%, 
> > then drop, then back up again, etc.
> > 
> > Ideas?  To me it would seem to be the acceleration valve.
> > 
> > 
> >
> 
> 
> 
> 
> 
>