Hi all, i've got a Simple 400 and knife edge is impossible for me. The rudder hinge is at an angle to the thrust line, swept back. All the rudder is above the elevator. I'm thinking of a few mods.

1- Split the elevator and have the rudder run to the bottom of the fuse.

2- Replace the rudder and fin so I can acheive the verticle rudder hinge line.

3- The fin and rudder will be moved back about an inch.

Will this make the rudder more effective/ predictable?

Thanks for the help, Mike

I think you'll find that it won't help much. The fin and rudder area is still going to be too high compared to the fuselage area. Also the design is more of a speedy racer'ish model and just does not have much side area in the first place. You'd be far better off to admit that this is a design for just cutting some snappy high speed passes and pylon type turns and go for a new model for doing knife edge and similar stunts.

But if you insist on trying then I suggest you add a profile or built up canopy over the wing and have a tail extend back to the fin to add side area higher on the model.