----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]----
The rule states the aircraft is capable of maximum airspeed in level flight with maximum continuous power of not more than 120KTs CAS at standard atmospheric conditions at sea level. The aircraft is certified as this and if it does something different under different conditions that is OK. It has nothing to do with ground speed. After all even the FAA can't control tailwinds. They aren't going to expect a pilot to do a bunch of crazy calculations to comply with speed limits, either the aircraft is compliant as an LSA or it isn't and this is just one of the speed limits it will need to comply with. Kevin -----Original Message----- From: Clem Boddiford [mailto:[EMAIL PROTECTED] Sent: Thursday, December 29, 2005 8:22 PM To: [email protected] Subject: [COUPERS-FLYIN] LSA/ISA ----[Please read http://ercoupers.com/disclaimer.htm before following any advice in this forum.]---- 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/ ============================================================================== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/
