That is a Kis Cruiser and it is composite. The firewall is 1/2 inch (I

think)

 plywood with glass on both sides. Four or five layers of 10 oz as I recall.
 Vance engineered it so he would now. The rear mount has about 50 pounds
 max static on it and about 300 pounds in a six G turn or a hard landing

drop

in.
 While the airplane is climbing and the prop thrust is a max the load on

the

 rear mount goes to near zero.

 As I recall you have a metal Murphy so beef it up like this Questair

Venture

 picture with a steel hat section. The Questair has a very short link but

the

 link can be of any length. Mine goes from the oil pan to the top of the
firewall.

 Paul Lamar

Paul,
KIS firewall is 1/4" ply with glass layers. Number of layers depends on
exactly where you are talking about.

What diameter and material are you making the rear strut out of?

Bill Schertz
KIS Cruiser #4045

1/4 inch?? Jeez Vance that is THIN! :-)

3/4 OD .049 4130 steel tube with left and right 3/8 rod ends.
The Questair guys adjust the thrust angle for top speed.

Jerry Hey came up with a good idea also.

Paul Lamar
 
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