"Cubdriver" usenet AT danford.net wrote in message
...
On Mon, 09 Oct 2006 17:04:35 +0200, Mxsmanic
wrote:

But if you set by feel, how do you keep track of how much control
surface movement you have remaining? If the trim has a control
service held very near the limit of its travel, you might run out of
space when you need it.

That's what 'weight & balance' calculations are all about!

And that's why you don't fly a J-3 Cub solo from the front seat. It's
just barely possible (if it's not placarded!) but you run the risk of
running out of control with the stick.

In the Cub, I always run out of TRIM control in level flight. It's
right up against the stop.

I remember in my "engine-out" practice for my license, trimming for best
glide speed of 65 kts in a C-172, basically when you run out of nose up
trim, you will be at best glide speed. Evertime I have trimed it (C-172)
for 65 kts, I ran out of nose up trim, but still had enough movement in the
elevator to fly the airplane. You have to be prepared though when you go to
apply full power with all that nose up trim, as you are going to have to
push hard on the yoke to keep it from pitching up too much, and retrim after
adding the power. :-)

Wade Hasbrouck
PP-ASEL
http://spaces.live.com/wadehas