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What does ISA refer to?  (Google isn't helping me...)

But as someone else replied, planes go faster at higher altitudes. The LSA spec limits the speed to about 138 MPH at sea level, which apparently can translate into >150MPH at 8-10,000 feet. I noticed this is on the Sonex website. Sounds like a good deal to me!



On Dec 29, 2005, at 2:41 PM, Clem Boddiford wrote:

It seems to me that a fast speed at altitude, will equate to an even faster speed at std. sea level conditions using the ISA assumptions.Yet, I've seen claims, for LSA compliant planes, that go the other way (e.g. 138 mph at std. sea level and much faster at altitude). Is this reasonable, and more importantly LSA compliant?

JOHN

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