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Date: Mon, 29 Apr 2013 14:17:27 -0400
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From: Craig Berland <cberland@systems3.net>
Subject: [LML] Re: Recent flight
Thread-Topic: [LML] Re: Recent flight
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Angier,
I have an A36 Bonanza with Osborne Tip Tanks.  They utilize a transfer pump=
 and a switch mechanism that senses pressure (I think). The switch turns it=
self off when the tip tank runs dry.  To start the transfer you must turn t=
he momentary switch to "on" and hold it there for about 5 seconds.  Once pr=
essure builds, then the pump continues to run until the tank is dry.  May b=
e something to check out.
Craig Berland
IV-P N7VG

Yesterday's flight from KBVY to KEFK on the Canadian border and back provid=
ed a good opportunity to experience lean of peak performance for the first =
time. About 80=BA lean of peak is where roughness became noticeable. With f=
uel flows jumping around due to ongoing electrical issue(probable), it's no=
t at all certain what the correct flow rate was but it was bouncing around =
in the 6-9gal range at 8500ft. Several weeks ago I installed an LED indicat=
or in the panel to let me know when the auto fuel system relay was energize=
d since I wanted to be absolutely sure fuel wasn't being pumped overboard a=
t the high level, it wasn't. This flight was also the first time I ran the =
wing tanks dry. Since I could not hear the transfer pumps in normal operati=
on, I was hoping to hear them when running dry but I could not. I'm thinkin=
g that an optical sensor in each fuel transfer line might be useful to know=
 for sure the tanks are empty so the auto transfer system can be deactivate=
d so as to not have the pumps running dry.

Angier Ames
N4ZQ
25hrs and beyond Phase I