Usable fuel is 30 gallons, and during cruise Diette figures he bums between six and seven gallons per hour. He typically flight plans a true airspeed of 105 knots. Endurance is about 3.
USABLE FUEL (LBS)
Usable fuel (gallons) x 6.7 lbs/gallon
USAF
US Air Force ...
What is its usable fuel capacity?
What is the average fuel burn rate in normal cruise?
What type of fuel system does it have?
Using the J3 Cub as an example, it holds 12 gallons of usable fuel, and the fuel burn rate is 4.5 gallons per hour. At that rate, the Cub can safely remain in flight for about 2.1 hours and still have a 30-minute reserve.
Empty weight typically equipped + unusable fuel and trapped liquids + 2 pilots (400 lbs.) + supplies.
BCD - Binary coded decimal.
Beam width - The included angle of a weather radar interrogation signal.
Bendix - Avionics mfgr.
Unusable fuel (which includes undrainable fuel) is the amount of fuel that cannot be used in level flight. This amount can vary from model to model and in the aircraft flight manual you will find the specifics for your aircraft.
The usable fuel, for all flight conditions, is 60 Gallons. Fuel from each wing tank flows by gravity to selector valve.
The empty weight that consists of the airframe, engine(s), unusable fuel, and undrainable oil plus standard and optional equipment as specified in the equipment list. Some manufacturers used this term prior to GAMA standardization.
The maximum certified total aircraft weight allowable before usable fuel must be loaded in the aircraft, as limited by aircraft strength and airworthiness requirements.
Structural-limit payload ...
FUEL DUMPING- Airborne release of usable fuel. This does not include the dropping of fuel tanks.
(See JETTISONING OF EXTERNAL STORES.) ...
Zero Fuel Weight - The weight of an airplane minus usable fuel
Zulu - Universal Co-ordinated Time
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zero - fuel weight maximum permissible weight of an aircraft beyond which an additional load must be in the form of fuel (i.e. max take-off weight less total usable fuel in applicable aircraft, ...
adequate in the most critical configuration - at full power usually in tail low attitude. The fuel "head", i.e. - height of fuel from carburetor to fuel tank must meet the minimum level for continued operation with little more than the unusable fuel ...
 See also: Flight, Aircraft, Power, Pilot, Aviation
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