Lalo37

Just wanted to see what you guys think.
As I understand it, Indicated stall speed changes only with load factor, weight, and, power (available).....................

Does indicated stall speed change with altitude?
I cant seem to find any clear answers.
Thanks guys......and gals

patton33

No, indicated stall speed should remain the same.

If you have a multi engine rating refer to your Vmc vs Stall speed diagram, should answer the question in graphical terms.

Lalo37

Thank you sir!

rickair7777

Assuming fixed GW, CG, and AOA...

At higher density altitude:

1) The true airspeed necessary to generate sufficient lift increases. This means that you have to fly FASTER to maintain your stall margin.

2) The reduced air density causes the AS indicator to read lower than true.
As the pilot flys faster (to keep indicated airspeed at normal values), the TAS will then be higher than at sea level.

Convienently, the amount of reduction in IAS at higher density altitudes approximately matches the required increase in TAS to maintain normal stall margins...so we just fly the same numbers regardless.


Note: your groundspeed will be higher on landing, so the distance remaining markers will go by more quickly.

Lalo37

Good info! Thanks Rick

cfii2007

From what I remember.....indicated stall speed will remain constant, however true airspeed must increase with a increase in altitude.