"cavelamb himself" wrote in message
link.net...

Richard,

Here are some pictures from behind the cockpit that may help
understanding Brian's control system..
http://www.soaridaho.com/Schreder/Co...ick_Mod_11.jpg
The above picture was take looking forward. It shows the bulkhead aft of
the wheelwell. You can see the series of bell cranks that actuate the
ailerons and the push the stick's push rod as it is routed through the
right side of the bulkhead. The elevator push rod and direction reversal
crank can be seen on the left side of the bulkhead.

(More pictures
http://www.soaridaho.com/Schreder/Co...tick_Mod_9.jpg
http://www.soaridaho.com/Schreder/Co...ick_Mod_10.jpg)

As you can see, there are no "U-joints". The linkage has almost no
"slop" and give good control surface feed-back.

It should also be noted that the ailerons droop and reflex with the flaps
avoiding misalignment during normal cruise and thermaling flap
configurations.

Wayne
HP-14 "6F
http://www.soaridaho.com/Schreder



Richard



Sorry. my bad.
I was refering to the U-Joint in the Elevator pushrods.
(and a word of warning about them...)
http://www.soaridaho.com/Schreder/Co...ll.html#ujoint

That lateral torque tube (actually a walking beam) in my sketch is in
the elevator control system. It takes the pushrod from the lateral
joystick torque tube and inverts it so the long tube to the elevator
is in tension. Also centers up the aft push pull tube.

The lower arm in the center is the attach horn for a MAC servo (elevator
trim) coupled by a "U" shaped fiberglass spring. I didn't dream that
one up - saw it on the net some years back - but I wish I had.

Well, _I_ thought it was a pretty simple setup...


http://www.soaridaho.com/Schreder/Sc...76_Page_28.JPG
http://www.soaridaho.com/Schreder/Sc...76_Page_29.JPG