Johnnyboy

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About Johnnyboy

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  1. Johnnyboy added a post in a topic AK 670 Powered Kitfox on Barnstormers   

     I am installing a 670 in an Avid Mark IV that previously had a 582. The 670 was acquired from Rotax Ron. The problem I have encountered is mounting the supplied exhaust. It is an elongated muffler that does not fit beneath the engine as the 582 round exhaust did. I have tried several ways to mount it but ultimately the pipe hits the cowling on the left side and the muffler is to close to the firewall and/or cowling at the bottom. This is an inverted engine mounting. Has anyone installed a 670 in an Avid Mark IV? Any help would be appreciated. My phone is 509 793 6043. As it is now, the cowling would have to be modified to allow the muffler to hang below the engine, and even at that it would be protruding out.
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  2. Johnnyboy added a post in a topic Max Structural Cruise   

    Va is maneuvering speed. Vno is Normal Operating speed. They are not the same. Normal operating range is generally depicted with a green arc on an airspeed indicator. There is a caution range which is in yellow. This speed is meant for smooth air. Maneuvering speed is the speed that abrupt control movements will cause the plane to stall before structural damage occurs. There is a max maneuvering speed set by the manufacturer. It is a speed computed at gross wieght. Maneuvering speed is reduced if you are flying below gross. Normal operating range for the Avid is stall speed to maximum structural cruise. Maximum structural cruise is normally the top of the green arc. Vne is the max speed or red line for the plane.
    John
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