Which way do jet streams travel?
Which way do jet streams travel?
From West to East
East to West (In Africa during the summer)
When does speed change from IAS to Mach?
When does speed change from IAS to Mach?
At FL260
Does a jet have a critical engine? Why yes or no?
Does a jet have a critical engine? Why yes or no?
No, there is no P-factor (asymmetric blade effect) as on a propeller-driven aircraft.
How does a jet engine/gas turbine work?
How does a jet engine/gas turbine work?
Forward motion forces air into the intake which is a convergent duct where it is compressed (causing a temperature rise).
Fuel is added and combustion takes place increasing the volume. The expanding gasses accelerate to the atmosphere through the exhaust duct nozzle producing a propulsive jet.
Tell me about the last aircraft you flew in.
Tell me about the last aircraft you flew in.
Example answer for a candidate with previous Seneca experience:
Weights:
Max all up weight – take off 4570lbs Max all up weight – landing 4340lbs Empty weight - 2830lbs Usefull load - 1740lbs
Speeds:
Clean stall 66kts with flaps 60kts Vyse 89kts Cruise 140kts gear raising 107kts – lowering 129kts. Vne 195
The 6 cyclinder teledyne continental turbo- charged, fuel injected engines provide 200 hp at 2575.
Left engine rotated clockwise and right anti clockwise.
No critical engine, RayGay turbo’s 42” MAP, 40” limit at lower levels, cowl flaps provide cooling and has 3 positions, open mid and closed.
Avgas 100/130
Props 2 or 3 blade, constant speed, hydraulically actuated, fully feathering.
Oil keeps props at fine pitch, gas and air keep the rpm towards feather. Takes 6 seconds to feather and must happen before locks engage at 800 rpm.
Limit load factor 3.8G
Fuel 2 x 54 (64US) gallons tanks 8 quarts oil max 6 Min
Retractable gear – hydraulic pumps – electrically driven. 6-7 seconds transit
Nose gear has 27 degrees castor.
Main wheels 55psi, nose wheel 31psi
Cable operated controls, all moving stabilator with anti servo tab which acts as a trim.
Frise ailerons and differential ailerons, up more than down.
Manual flaps, 3 settings, 10, 25, 40 degrees.
4.5” – 5.2” hg suction – AH, DI.
Heated lift deflectors and stall warners, anti ice.
What errors would cause an altimeter to malfunction?
What errors would cause an altimeter to malfunction?
Altimeter errors:
Instrument error Pressure error Time-lag error Barometric error
How does GPWS work?
How does GPWS work?
GPWS is a central computer system that receives various data inputs on configuration, (radio altimeter) height/altitude and instrument landing system glide slope deviation and is able to alert the pilot when a dangerous situation is about to occur.
Where does the wing stall first on a typical SEP Aircraft (Cessna, Tecnam, ...)?
Where does the wing stall first on a typical SEP Aircraft (Cessna, Tecnam, ...)?
At the wing root. This is a property of rectangular wings, but it's also common to find close to the wing root devices that make it so that the wing root stalls first.
What is the height of the tropopause according to ISA?
What is the height of the tropopause according to ISA?
36,090ft in ISA
What is the speed of sound at sea level according to ISA?
What is the speed of sound at sea level according to ISA?
662 kts
Local speed of sound = 39 x √(Temperature in Kelvin)
15°C in Kelvin is (15 + 273) = 288
So the local speed of sound = 39 x √288 = 662 kts