"Chief McGee" wrote in message
news:JSMNf.1522$oL.225@attbi_s71...
Just watching a movie with a 4 engine prop plane running out of fuel over
the ocean. So what would be the best way to conserve fuel. I'm thinking
throttle back all four engines and let them loaf along. Or would you cut
two engines and let two carry the load. Two would have to work harder,
but
would they use less fuel then 4? Of course, range becomes more important
then speed. Any opinions?



Just ask "Old Whistling Dan"...

If it is a reciprocating engine, you'll do better at a low RPM, adjust MP to
hold your best L/D(or your best glide speed), and lean it all you can
without detonation.(Make the most out of each "piston push", intake each
cylinder as few times as possible, best L/D=most efficient airspeed, see
Lindberg)

If it was a Turbo charged engine, you'd do better up high, up to the mid
20's.(high true airspeed)

It you are Eastbound, you'd usually do better up high, up to the mid
30's(Tailwinds, use a slightly lower glide speed, aim for best endurance to
take advantage of the wind)

In most aircraft, Keep them all turning. After you've ditched all the weight
you can, close all the cowl flaps, vents, doors & windows. Get rid of
external stores. Think clean thoughts.

Move the CG slightly aft.(Won't help much, but what the hey. It reduces
elevator download & drag)

Don't run windshield wipers and reduce the electrical load.(wipers produce
drag, electrical load eats horsepower)

If you're John Wayne, coming from Hawaii to Oakland, in the High and the
Mighty, don't worry, it will work out.

Al (US National Economy Record Holder)