Today's POF Exam

[whydididoit]

To those who took the POF exam today.. a few questions..

Q1 - Stall warning in a transport aircraft
Two options were
a - Stick(shaker or pusher dont remember which)
b - Stick(shaker or pusher dont remember which) and/or Aerodynamic buffeting..

I am pretty sure one of those was the answer, but not sure which.

Anyone else remember any of the questions on there..
The test was 44 questions, 47 marks.

3 3 markers included questions on:
Propeller power ( i think the answer was Thust - Brake)
Climmb gradient (I didnt even come close)
and another which i cannot remember.

[My names Turkish]

The climb gradient I had no idea how to do. It was alnong the lines of: Twin engine aircraft, each engine 60,000N thrust, L;D 12.1, what is the climb grad.

In an expansion wave as the air passes through the wave:

LSS Decrease
LSS Increases
Reamains Constant

It seemed like a a fairly reasonable exam, although I hope those words dont come back to haunt me this time!

[whydididoit]

The question about the local speed of sound was that the LSS will decrease..
I am cautiously optimistic about this one..

[Dean Johnston]

POF is a subject you need to know, you can't wing it.

Q1. In an expansion wave the temp will decrease ( so use your wizz wheel to work out what will happen to LSS.

Q2. L/D ratio is 12/1 ( I think you will find the A/C wt was 50 metric tonnes) so drag is 500,000Kgs.

500.000 / 12 = 41.667

Total trust is 60.000 x 2 engines = 120.000

120.000 - 41.667 = 78.333 / sin gamma.

sin gamma = opposite / hypottenuse.

78.333 / 500.000 x 100 = 15.67 % Grad.

This question is one that is on the CAA website, i don't know which school you are with but they should have made you aware of it. You could try having a look at this site www.bristol.gs/forum.htm and go to Pof.

As said you really need to know this subject.

Hope that helps.