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Re: [LML] Lancair IVP Wing...Unuseable Fuel
Quantity?
I assume the highest number from this test sequence would
represent the prudent "official" in-flight redline for the
tank's fuel quantity.
Jeff,
Consider at least 4 conditions, three of them can
be tested on the ground.
1. Level as in level un-accelerated cruise
flight.
2. X degrees nose down attitude that might be used in
straight line extreme descents with air brakes and perhaps gear
extended. This condition can be fixed temporarily by
reducing X or switching to a fuller tank if the measurement device is
accurate in such an attitude.
3. X degrees nose up attitude used in straight Vx
or Vy climbs. See # 2.
4. Slip/skid extended flight to test the size and seal
of the slosh chamber when the wing fuel is "low". Most
"ball out" flight is done at low power so the fuel draw is
reduced.
Items 1, 2 and 3 could be tested on the ground
with the wings attached (hard) or a jig could be built to test just
the wing by holding the proper dihedral and incidence. Water and
a pump could be used to find when the fluid would become
un-ported. Then it is just a matter of measuring how much fluid
was present when the un-porting occurred.
Scott Krueger AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)
Darwinian culling phrase: Watch
This!
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