OK. I was attempting to distinguish it from a rotary cam, which what most people think of when you talk about cams.
No slight intended, no matter what it is called, it is the only way I have seen to accomplish the intended purpose!
Brett
OK, so it really should be called a slider with a slot that can be made to program the rudder movement with elevator.
Anyway, thanks for the compliment.
You are correct, it does not take much rudder movement to get desirable results. On the Rabe Bearcat I flew for several years, the rudder was off-set to the right about 1/8" at neutral elevator, the rudder moved about another 1/8" to the
right with the elevators probably less than 30
o down, and then the rudder moved about another 1/16" to the
right with the elevators probably less than 30
o up.
The semi-scale Bearcat presented an unusual configuration because the rudder was tall and was well above the thrust line. Too much right rudder wanted to yaw the airplane to the right while wanting to roll the airplane to the left. (Not a comfortable feel at the handle.) Rudder movement had to be kept small. Once the solution was found, it was a pleasure to fly, particularly the high outside turns of the vertical eights, the hour glass and the four leaf clover.
Igor's rudder, by comparison, is relatively small when compared to most semi-scale stunt models, has a relatively low aspect ratio and is essentially on the thrust line.
I think most of those who tried the Rabe rudder used way too much rudder travel for any control movement at the handle and discarded the idea without fully exploring what his idea could do for how well a model could fly.
There are many models that have won the National Stunt Championship (Walker Cup) without the use of the Rabe rudder idea. Only two models have won the National Stunt Championship using the idea. Plus another won the Open Nationals, but not the Walker Cup with the Rabe Rudder.
Keith