Yawn. Yes, I know...
But being fairly new to aviation AND mathematically challenged (you don't know how much
), I'm having a hard time with some of the questions cropping up in past papers which I'm revising for an exam later this year. So maybe someone brainy might be able to explain the following to me?
Anyway, here's the question:
An aircraft is flying at an altitude of 15 000 ft. The machmeter indicates 0.4 and the outside air temp. is – 15°C. The true airspeed is:
a) 200 kt.
b) 250 kt.
c) 250 km/h.
d) 338 kt.
Gulp. Where do I start?
Very hypothetical when you're bimbling around in a Cessna or a Jodel, I know, but...
All hints gratefully received (btw, I've managed to grasp the idea that TAS is likely to be (considerably) greater that IAS as altitude increases?) but that's as far as I've got.