Miscellaneous

Question 1

How long is the touchdown zone?

Answer 1

It’s the first 3,000’ or first 1/3 of the runway, whichever is shorter

Question 2

What’s the difference between free turbine vs. direct drive?

Answer 2

Compressor is driven by turbine. In free turbines, the loads are driven by rotors that are not physically linked to the turbines. Free Turbine. In a free-turbine engine, the propeller is driven by a dedicated turbine. A different turbine drives the compressor; this turbine and its compressor run at near-constant RPM regardless of the propeller pitch and speed.

Question 3

Does ATC have the authority to override any speed restrictions and ask you to go faster?

Answer 3

For operations in a Class C and Class D surface area, ATC is authorized to request or approve a speed greater than the maximum indicated airspeeds prescribed for operation within that airspace (14 CFR Section 91.117(b)

Question 4

Can you start a turboprop engine while holding the prop?

Answer 4

If its a free turboprop, then yes you can because the power turbine which spins the propeller is not connected to the compressor turbine

Question 5

What is balanced field length?

Answer 5

The distance where Accelerate stop and accelerate go distances are equal.

Question 6

Is the speed of sound the same speed at sea level and at FL390?

Answer 6

The speed of sound has to do with temperature, in colder temps sound travels slower so at altitude you’d reach the speed of sound at a lower speed than you would at sea level

Question 7

When choosing a high cruising altitude what is the limiting factor?

Answer 7

Maximum cabin pressure differential