Range and Endurance

Question 1

22.30.2 Define specific air range (SAR) and specific fuel consumption (SFC).

Answer 1

SAR: Air Distance flown per unit quantity of fuel.
SFC: fuel flown (GFC) per unit of power produced.

Question 2

22.30.4 State the general conditions for achieving maximum SAR.

Answer 2

A/C must be flown at maximum air frame efficiency and best range speed occurring at Min drag and Max LD ratio.

Question 3

22.30.6 Explain the airframe and engine considerations of flying for range (piston engine).

Answer 3

MAP high - manifold pressure set high
RPM low - lowest rpm
Leaned Mix - mixture is leaned according to height
FTH- full throttle height
Carb Cold - Carbheat cold for best engine running.
Super low - supercharger low
MRLFCS - Maximum Range, Low Fuel, Cold System.

Question 4

22.30.10 Define flying for endurance and differentiate between range flying and endurance flying (piston engine).

Answer 4

Range = Distance, while
Endurance = Time
Flying for max endurance = remaining in the Air greatest amount of time for least amount of fuel used.

Question 5

22.30.12 State the factors affecting endurance and explain practical endurance flying techniques.

Answer 5

Lowest safest altitude
Minimum weight
Lowest, leaned Rpm