Follow up to monster thread below re IAS and TAS and power required...

"Newps" wrote in message
. ..


Danny Deger wrote:


I found an aircraft performance chart and I stand corrected. At 75%
power the aircraft flies 140 TAS at sea level and 150 TAS at 8K feet.
This is 140 IAS at sea level and 124 IAS as 8K feet. I am very
surpprised, because I always thought you would get the same IAS for the
same power.

Every pilot is taught that in private pilot training. Those of us that
live at higher altitudes really know this because we deal with reduced
power every day.

I remember being taught that TAS would be higher at altitude, but don't
remember what was said about IAS for a given power level as you climb. Most
cruise charts just have TAS (IIRC). I moved to jets in the Air Force and
for the same engine thrust the IAS is the same for any altitude in a jet.
Like I said, live and learn. That one reason I frequent this group.

Danny Deger