Throt/ Rud

[Edward Skorepa]

I'm confused too. I know, I know I shouldn't argue with someone like chip but I believe the main reason we're putting right thrust is an asymmetric vertical fin. On most conventional airplanes the area above thrust line is much greater then area below. So, the spiraling slip stream  will hit the top portion of the vertical fin from the left pushing tail to the right thus right thrust. When inverted, the spiraling slip stream will hit vertical fin from the right because fin is now on the opposite side and  pushes tail to the left. To straighten the flight path, we need now the left thrust which is already there. During inverted push ups, why do we need to use left rudder? The spiraling slip stream misses completely vertical fin and the right (left when inverted) thrust is causing airplane to yaw left. If you have a big gasser, turn on smoke, do inverted push up and watch where the smoke goes. However, Chip's approach of fixing the inverted push ups problem is quite interesting and I'll try it on my new bird I'm working on right now.
ed
  ----- Original Message ----- 
  From: Nat Penton 
  To: discussion at nsrca.org 
  Sent: Wednesday, January 26, 2005 11:32 AM
  Subject: Throt/ Rud


  Cameron Smith relayed comments from Chip ( from RCU ) relating to how he uses a mix to eliminate the need for right thrust. I know Chip knows but he left me confused. Could someone clarify what he said?


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