>From the two replies to my first message, and reading once again Bud Yerly's
detailed explanation last fall on how he set up a one-sender unit, I now
understand how one sender can be made to work accurately enough to show fuel
consumed/remaining. As I indicated in my second message, the reading error
at flows outside the normal cruise power evidently are of too short duration
to give much error in the flow x time = consumption calculation. The
attached illustration shows this clearly, I think (it is fairly accurate to
scale).
I therefore regret my earlier statement that one single transducer will
serve only one useful purpose: with the engine stopped and the electric feed
pump running, one can check that the return line is open. In actual fact,
this feature is an additional feature to keeping good enough track of fuel
consumed (provided that a K-factor has been found that gives true
consumption for a typical flight time).
With my two-sender system (one in feed and one in return line), I cannot
check that the return line is open unless I somehow disconnect momentarily
one of the senders. I have therefore asked Electronics International in
which wire I can introduce a push-to-break pushbutton mounted next to the
display unit. This return flow check will then become an item in my
pre-engine-start checklist.
I will then also be able to inform the List about actual return flows at
various power settings and tank levels, for those who share my sometimes too
deep interest in the mysteries of our aircraft!
Regards,
Svein
LN-SKJ
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