Cruise Flashcards
What is the equation for specific fuel consumption for a jet?
Fuel flow / thrust
What is the units for specific fuel consumption?
Kg/hr/N
What is the equation for specific fuel consumption for a prop?
Fuel flow / Brake horse power
Rate of climb is proportional to power available minus blank.
Power required.
What RPM % is the lowest SFC achieved?
90%
Whats the equation for specific air range using fuel flow?
SAR = TAS/Fuel flow
Whats the equation for specific air range using specific fuel consumption?
SAR = TAS / SFC X drag or power
What is the specific range for a piston aircraft?
1/SFC x drag
At what speed do you get the best range in a jet?
1.32 VMD
At what speed do you get the best range for a prop aircraft?
1.32 VMP or VMD
Do we want a high or low endurance?
High.
Whats the equation for jet endurance?
1/SFC x Drag
Specific range increases until when?
Optimum altitude.
Whats the equation for cost index?
Cost index = cost of time / cost of fuel
Which cruise system gives minimum fuel consumption?
Max range.
Step climbs are used to improve blank.
Range.
Long range speed bs max range speeds means a higher what?
Cost index.
Blank increases up to an optimum altitude then decreases.
Endurance.
How does increasing pressure altitude influence VMCA?
VMCA decreases.
On a twin engined a/c, if an engine failure occurs above the OEI ceiling, the least rate of sink occurs when the aircraft is flying at the best angle/rate of climb speed.
Angle.
