Light Plane Philosopher
- Dec 16, 2007
- Port Townsend WA
Moving the horizontal tail lower into the center of the prop blast might help also. See Lake Amphibian for mid level example.I can't speak for the wing size, but I heavily researched the J-1B before I started the design.
It is a bit short coupled, and there is some question as to the horizontal tail authority. In particular, this shows up on take off. With the high-mounted engine there may not be enough elevator to get the nose up without a long take off run. Also, the few pilot reports indicate that it can be flown hands-off for only "a short time", whatever that means.
There are two ways to correct the problem. Either make the horizontal tail larger as stated, or lengthen the empenage which is what I am doing. A couple other things that are recommended is to seal the elevator gap, and install a Guerney flap on the elevator.