Originally Posted by
Fl1ingfrog
Bit complicated G
Using the CRP 1 or 2 first always set that which you know.
Set 77 (the distance to travel) on the outer scale over 42 (time in minutes) on the inner scale.
Read off over 60 (minutes) on the inner (time is always found on the inner) 11 (that being = to a distance of 110) so the true airspeed (TAS) in still air requires to be 110kts.
So what should you expect to see on your ASI in the aircraft, which needs correcting for air density?
Set in the AIR SPEED window +10 degrees over pressure altitude 5000ft (5)
On the outer scale find your 110 (11) and below on the inner scale read off 101 (and a little bit) so your indicated air speed (IAS), now known as the corrected airspeed (CAS) is 101kts (forget the little bit).
You are not required in the question to identify the actual density altitude.
G is absolutely correct of course but this is an exercise in wholly using the whizz wheel using only basic arithmetic.
F
Forgive me for saying this but the Crap 1 is on a par with one of these.
Signal squares,morse,ADF etc all belong to the last century along with whizz wheels.