Throt/ Rud

[spbyrum]

The question becomes how small a diameter prop and how slow must you go
for this situation to kick in.  SPA doesn't fly rockets like the old
days.  Noise is a bad thing.  4 strokes with larger props slow us down,
too.
 
Steve Byrum 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of John Pavlick
Sent: Wednesday, January 26, 2005 11:48 PM
To: discussion at nsrca.org
Subject: RE: Throt/ Rud
 
Ed,
 Sure, but you can only fly planes like that in SPA!!! (Or Sportsman).
My Super Kaos Jr. is set 0-0-0. Just a little bit of right rudder and up
elev. trim - still tracks down lines straight. I don't mix anything with
the radio - it's all done the old fashioned way! 
John Pavlick
http://www.idseng.com <http://www.idseng.com/> 
  
-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Ed Hartley
Sent: Wednesday, January 26, 2005 10:35 PM
To: discussion at nsrca.org
Subject: Re: Throt/ Rud
Think about having the trim and thrust where you don't have to do
either?????

Ed
 
----- Original Message ----- 
From: John Pavlick <mailto:jpavlick at idseng.com>  
To: discussion at nsrca.org 
Sent: Wednesday, January 26, 2005 10:13 PM
Subject: RE: Throt/ Rud
 
Ed,
 Don't think about inverted / upright / right / left like that. It's all
the same to the airplane. Upright the slip stream hits the left side of
the fin causing Left yaw. For sake of argument: Right thrust will be
used to counteract this. Inverted, the SAME THING happens. Don't think
right / left in reference to YOU, think left / right in reference to the
AIRPLANE. When inverted the slip stream hits the left side (still) of
the fin - unless the motor suddenly starts turning the opposite way.
Same thrust offset ("Right") required unless the slip stream goes away
in a push. Now if there's right thrust, you need left rudder to offset
the right thrust which is trying to make the airplane yaw right in the
absence of the slip stream air on the fin. If you still want to think
about it the "other" way, remember "left" rudder when inverted will make
the plane yaw to the "right" (in reference to YOU standing there
watching the plane). Now I'm getting confused.
 If you think about what Chip described: Trim for straight flight at
full throttle, mix left at idle. Another way would be trim straight at
idle, mix right at full throttle. That's what I've been doing. Same
difference. 
John Pavlick
http://www.idseng.com <http://www.idseng.com/> 
  
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