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ISA is the international standard that establishes lapse rates for pressure, density and temperature up to the flight levels. For example they set std. sea level pressure as assumed to be 29.92" HG. As John V. points out 138 mph indicated at sea level is LSA compliant. 138 mph at 8000' is really 150mph on your GPS GS. This is where I get puzzled. Does FAA mean, as long as you do not indicate more than 138 mph at any altitude, you are OK? Or are they going to say, you must adjust the 138 mph indicated at 8000', to equate it to std sea level conditions, by increasing it by the ISA altitude lapse rate, which will bring it up to 150 mph CAS at sea level, and that is not compliant. Your thoughts are appreciated....John ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/
