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View Full Version : a Question a bout altitude and speed

Farid
3rd Aug 2011, 20:45
why at the airbus for example,
at higher altimeter a speed limited get increased?

thankyou
exeng
3rd Aug 2011, 22:22
What speed indication are you asking about? TAS will increase.
Farid
4th Aug 2011, 08:16
i mean the indicate air speed IAS
GearDownThreeGreen
4th Aug 2011, 11:21
A very simple explanation is:

The higher you go, the more your TAS will increase compared to your IAS. Eventually it will reach reach Mcrit for an IAS as low as the airplanes stall speed.

Coffin corner (aviation) - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Coffin_corner_(aviation))

This page should explain it.
NZScion
6th Aug 2011, 07:28
If you are talking speed limits, generally there is a restriction of 250 knots maximum, indicated airspeed, when operating below 10,000 feet. Some places may have different/no restrictions.