I think people are mixing this up a bit and making it too hard. The rule is pretty straightforward. It says nothing about 75% power, etc. I think it basically says, set max continuous power (for example, a Rotax 912 would be 5500RPM) and see how fast you're going at sea level on a standard day. (If you can't achieve sea level, use a whiz wheel and calculate the equivalent) If it's 120KTS CAS or less, you're legal. Maybe I'm oversimplifying, but then I try not to get involved in seeing how many angels can dance on the head of a pin.
Jim
From: UltraJohn
Sent: Monday, February 27, 2012 7:09 AM
Subject: Re: Light-Sport Aircraft Yahoo group Re: Cruising speed
That is the part that is not correct, few if any aircraft have their CRUISE set at MAX continuous power. Look it up in any POH.
Normally CRUISE is set at about 75% of Max...
john
On 2/26/2012 11:43 PM, Peter Walker wrote:
HelloCruise is set at the aircraft manufacturers specified MAXIMUM continuous power at sea level in straight and level flight What that gives at 5000 feet is not an issue
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