Posted 24 Sep 2020 Would someone here be able to give me the dimension of the round rudder, mainly interested in the width. I have a stretched fuselage with an over sized rudder and it's to much rudder authority. I'm thinking of changing the rudder back to stock. The previous owner was going to put the plane on floats so the rudder was enlarged. Thanks, Neil Share this post Link to post Share on other sites
Posted 24 Sep 2020 If I remember, I can measure the one on my MK IV tomorrow. I do have an earlier squared off rudder like what was used before the MK IV rounded rudders. Just remembered, I had some pics on my phone. The rudder is 18" at the widest from front to back on my MK IV. JImChuk 1 person likes this Share this post Link to post Share on other sites
Posted 24 Sep 2020 I think I would keep that bigger rudder and just change the throw on it so it travels less. 1 person likes this Share this post Link to post Share on other sites
Posted 24 Sep 2020 Thank you !! I'll post my handling problem later. Both those post help. Neil 1 person likes this Share this post Link to post Share on other sites
Posted 25 Sep 2020 Here are a couple pictures comparing model C and Mk 4 control surfaces. 1 person likes this Share this post Link to post Share on other sites
Posted 27 Sep 2020 I lengthened the rudder horns and that reduced the rudder pressure and movement some. The trailing edge of the ailerons have been increased by 1 1/2 inch and I'm wondering if this could be adding to my adverse yaw. I have the F7A mod and can't say that it helped much. I can remove the extensions by drilling out the rivets. What do you all think ? Neil Share this post Link to post Share on other sites
Posted 27 Sep 2020 (edited) I would imagine the larger ailerons do add to the adverse yaw. After all, they cause it in the first place. Can you overcome the adverse yaw with the rudder? If so, maybe it's just a matter of getting used to using your feet more. What was the idea in enlarging the flaperons in the first place? JImChuk Edited 27 Sep 2020 by 1avidflyer Share this post Link to post Share on other sites
Posted 28 Sep 2020 Jim, The ailerons and rudder were modified because he was going to put the plane on floats, also the fuselage has been lengthen by 16". Your right about the feet. It takes plenty of rudder for sure. This is my second Avid so I have a pretty good idea how it should fly. I think your right about the ailerons causing the problem in the first place. So I started to remove the extensions yesterday. I'll test fly it tomorrow. If that doesn't help I'll start thinking about putting on a stock rudder. You stated the stock rudder is 18" at the widest point. This rudder is 24". Maybe I can pick up a round rudder from someone on this forum. Thanks, Jim and others for your help, Neil 1 person likes this Share this post Link to post Share on other sites
