The power required at low altitude for a given IAS is
- unchanged with altitude.
- higher.
- lower.
Explanation from PART66Online
For a given indicated airspeed the dynamic pressure and therefore the drag are the same at any altitude. However, at low altitude the air is denser, so the true airspeed is lower for that same IAS. Since power required equals drag times true airspeed, the lower TAS at low altitude means less power is required.
T
trap2307 asked · 22 Oct 2014
Please explain. There is more drag at low altitude. Is it because of less quantity of oxygen at higher altitude?
Community Comments (5)
I
Ielgazali
7 Nov 2014
it has to do with air density .
J
juanda8322
7 Nov 2014
YES MR IBRAHIM AT HIGHER ALTITUDE THE AIR DENSITY IS LESS WHICH IN TURN PRODUCES LESS DRAG
3
3g_nitro
6 Oct 2016
This is talking about power. For combustion the higher the density the greater the power......
K
khatkar
16 Feb 2017
Low latitude is more drag. so clear power is lower. ..
B
bennguli
14 Apr 2017
For combustion the higher the density the greater the power...as juanda8322 says and at low altitude density is high,so surely guys engine power will be high or low?contradicting
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