This question is intended to be answered by ATPL candidates, it should be possible to solve it without going beyond the ATPL syllabus.
The question is an old one (probably 16 or 17 years old), so it really should be bread and butter stuff for ATPL instructors and students.
Let’s start by looking at a few things which ATPL students should know:
1. Rolling motions are generated by the aerodynamic forces acting on deflected ailerons.
2. The magnitude of these aerodynamic forces increases with increasing angle of deflection and with
increasing dynamic pressure.
3. If we climb at constant IAS the dynamic pressure will remain approximately constant, so the rolling
forces generated by any given aileron deflection angle should also be approximately constant.
4. Rolling motions are opposed by aerodynamic damping.
5. Aerodynamic damping decreases as TAS increases.
6. Climbing at constant IAS causes the TAS to increase.
7. Radius of turn = TAS squared / g Tan AOB.
8. Rate of Turn = g Tan AOB / TAS.
9. Under normal circumstances, keeping the ailerons deflected will cause continuous
rolling motion, but will not produce a constant angle of bank.
Looking at statements 1, 2, 3, 4 5 and 6, we should see that climbing at constant IAS will cause roll rates at any given aileron deflection to increase (Option A).
Looking at statements 7, 8 and 9 we should see that aileron deflection does not control the rate of turn or radius of turn, so options B and C are incorrect.
At this point we may be tempted to argue that “if we fly high enough our maximum IAS will be reduced, so our maximum roll rate will be reduced. But the question specified “ constant IAS” so this excludes any altitude at which it is not possible to maintain a constant IAS. So option D is incorrect.
It is a well known fact that many of the questions used in these exams are defective, but candidates must take care to avoid being too eager to simply tell themselves “Oh this is just another duff question”. Such eagerness is likely to cause them to raise large numbers of appeals, which are subsequently rejected. If they have paid insufficient attention to selecting the best option, the result is likely to be an examination failure. Whenever a candidate thinks that two or more options are correct, their first action should be to look very carefully at why they think each option is correct.
Last edited by keith williams; 23rd Feb 2017 at 08:43.