ORIGINAL: CGRetired
...... RC Ken, I think it was him, or Minflyer, posted a picture that shows how the air bleeds from one side of the wing to the other because of the pressure differential on the top as compared to the bottom. It will leak through gaps in the ailerons and cause the ailerons to be less effective. An average flyer will really never know it or notice it. Mostly those that do precision aerobatics, Pattern flyers for instance, will notice the difference......
In my [link=http://www.rcuniverse.com/forum/m_3439708/tm.htm]Pay It Forward build thread!! LT-40 build [/link] thread I addressed sealing gaps in the thread. You can find the sections in the build by following these links.
Aileron gap sealing starts here:
[link]http://www.rcuniverse.com/forum/fb.asp?m=5398504[/link]
Rudder/Elevator sealing starts here
[link]http://www.rcuniverse.com/forum/fb.asp?m=5589251[/link]
Hope this helps
Ken