skywagon8a
MEMBER
SE Mass MA6
Clayton,
Since the advertised cruise speed of the Patrol is significantly higher than a PA-18 I strongly suggest that you lean towards a smaller fish mouth angle than that which is designed into the installation by Wipline. Bill's Cub is 5 mph slower than mine which I attribute to the 2-1/4 degree difference in the fish mouth angle. The aerodynamics of the floats is also a contributor. When your land plane cruise speed is considerably higher as yours is supposed to be, that wide angle will produce a much larger drag component. In those cruise speed ranges it is not uncommon to see a 15+ mph speed penalty. So less is better. Your long flaps coupled with the 180 hp will make up for a smaller fish mouth angle for your take off performance.
Since the advertised cruise speed of the Patrol is significantly higher than a PA-18 I strongly suggest that you lean towards a smaller fish mouth angle than that which is designed into the installation by Wipline. Bill's Cub is 5 mph slower than mine which I attribute to the 2-1/4 degree difference in the fish mouth angle. The aerodynamics of the floats is also a contributor. When your land plane cruise speed is considerably higher as yours is supposed to be, that wide angle will produce a much larger drag component. In those cruise speed ranges it is not uncommon to see a 15+ mph speed penalty. So less is better. Your long flaps coupled with the 180 hp will make up for a smaller fish mouth angle for your take off performance.