Paul Wrote:
Vance since I am thinking of building or buying a KIS TR-4
and installing adjustable reclining seats
do you have a sketch of that "cantilever beam up the sides"?

I will need to remove the vertical panel that is part
of the existing bulkhead.

Also do you think 6 G's is too much to static test the rotary
engine motor mount on a KIS TR-4 given the sketch below?


Paul Lamar

Vance and Emily Jaqua wrote:

Paul - the stiffening is primarily to avoid buckling
of the curved side walls, particularly in the door
opening. Two things can aid in this task, one
is to increase the diameter of the pvc tube
installed along the upper side of the wall (it is
nominally for wires and coax) and increase the number of plies  
overwrap to about 5 or 6 with glass or 3 carbon. 

The other is the cantilever side beam
up from the center spar on each side to replace the
web of the seat back the sketch shows roughly how
this might be done. Bond well into the spar (might
well be included in the local spar attach layers,
"cap" with about 6 to 8 glass or 3 to 4 carbon plies

This will not provide the near infinite stiffness of
a full bulkhead, but should be more than enough and
allow you gobs of room for the seats. For a full
 adjustible seat you will probably want to get the
stick out of your crotch, and the other sketch is
a way to do that.

Six G sounds like a pretty good test, and I would
expect most any engine mount to pass that. Do not
forget that there are also side loads and precession
forces - at least grab and yank for deflection.

Many engine mounts use the engine to close out
those forces, and I worry about those.

That is a pretty neat way to do the force, but
you better get some heavy friends to hold down
the tail.

I am sending a copy to myself to check how the picture arrives.
I am going to respond to the stroke/balance nit
picking with another posting - Vance

Vance is chief engineer at KIS.
Vance-Jaqua-KIS-TR4.gif

Paul
 
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