Flap to Elev ratio?

[Paul Taylor]

On a F-Twister?

I was in the process of turning my F-Twister into a attic queen. Then looked at how much the elev moved compaired to the flaps. Seems the flaps have more deflection then the elevator.

So how is the best was to measure this and what should it be. I would think less flap and more elevator.

Not real clear on what it should be.

[John Miller]

You are right. If the plane is on the heavy side you want to be no more than 1-1 flap to elevator. Lighter weight = less flap needed. Most of my planes wind up with about 25 to 30 degrees flap, and 30 to 35 degrees of elevator.

[Brett Buck]

On a F-Twister?

I was in the process of turning my F-Twister into a attic queen. Then looked at how much the elev moved compaired to the flaps. Seems the flaps have more deflection then the elevator.

So how is the best was to measure this and what should it be. I would think less flap and more elevator.

Not real clear on what it should be.

   Stock Twister?  I would start at 1:1 or slightly more elevator than flap. If it looks like it is "swooping" through the corners, or looks like the airplane it turning around a point *behind* the airplane, then you have too much flap movement (compared to the elevator). If it looks like it is "fishtailing" through the corners or rotating around the nose, or tends to overshoot on every corner, you probably have too little flap movement (compared to the elevator). If you can't tell, get someone with more experience to look at it and tell you. For the most part, I would prefer to have too little flap movement and a snappy-looking corner that sometimes overshoots than a "swoopy" corner. I can finesse it if it's too snappy, there's nothing you can do from the handle end to fix "swoopy".

     Brett

[Phil Coopy]

I used 1:1 on my Fancherized Twisters and liked it.

Phil