Why does the rudder trim tab on the DA42 have a T-shape?
Asked
Active
Viewed 565 times
4
-
I'm not sure it is clear what you are asking. What do you mean by "characteristic"? – Juan Jimenez May 21 '19 at 12:30
-
I meant, aerodynamically what is the purpose of such design ? – Rohan May 21 '19 at 12:44
-
Looks like you got your answer then. :) – Juan Jimenez May 21 '19 at 12:59
1 Answers
5
The feature was added to reduce undesirable flutter discovered during flight test. It appears on the rudder trim tab of the DA-62 as well.
Romeo_4808N
- 73,674
- 7
- 150
- 274
-
"Buzz" (a simple vibration that doesn't excite sympathetic motion in the surface and structure) or just "vibration" might be a better word than flutter. When you get flutter you generally don't survive it. Another purpose of those kinds of TE add-ons (and the bulged surface itself) is to help with a dead zone problem that prevented the surface from precisely centering. – John K May 21 '19 at 20:07