Throt/ Rud

[Cameron Smith]

Chip has his own forum on RCU.I am not sure how attended it is. I'm sure
he would answer questions there eventually.
 
 I DO relate to his comments of : ," they do not have that funny yaw
through the corners"  I am running 5 degrees of engine thrust & on
corner radius leading to inverted flight I am noticing how I have to
chase/lead  the exits with left rudder. I think this is what he is
addressing. 
 
 I have reduced the amount of right thrust till it's noticed on the
upline and then chase it there. "Really Sucks!" I put it back to
4.something.
 
 I hope to remove ALL engine thrust & try his mix when the wind lays
down & it gets above 65.
 
 There was a time I was scared to program mix Yaw to Pitch. I now have
it in ALL planes. Even use slight down with Throttle for even nicer down
lines.(When CG work has been exhausted.) 
 
 
 I wonder IF Don S or Troy N. could comment on this.
 
 
-----Original Message-----
From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]
On Behalf Of Nat Penton
Sent: Wednesday, January 26, 2005 1:33 PM
To: discussion at nsrca.org
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?
 
   
I run almost no right thrust in my planes and use the thottle to rudd
mix at 2% left rudd. to throttle at idle. Thottle is the master rudd the
slave. This makes the planes fly so much better when inverted at idle,
they do not have that funny yaw through the corners. I have all but
stopped using right thrust and do it all with the mix. What happens is
the fin moves to the opposite side when inverted but the engine and prop
don't know it, so the plane starts to yaw really bad due to spiraling
slip stream. 

To set this up just go out and fly the plane straight away from yourself
at full throttle and then go to idle and watch to see which way it yaws
start with 2% and start it from half throttle on down. 

Trim it a full throttle with you rudder trim, and when you go to an idle
if the plane yaws left you have to much mix, yaws right there's not
enough. Have this screen up at take off and a buddy that can adjust it
for you. Once you have it going nice and straight at idle and full go
out and do a stall turn at the end of the box, on your way down do a
half roll and exit inverted, you will be amazed how well it will go
through that corner. 

Do that first before any other trimming. After that go with CG(45 degree
upline 1/2 roll and it should stay on that line with little or no down
elev.) then ail differential(1 Degree More up the Down) verticals(wing
incidence .5-1 degree positive, then put the stab where ever it needs to
go get the elevators to be neutral, you will at this time mix 1-2% down
elevator with throttle for your down lines), and knife edge last (start
with 5% up elevator with rudd.) 

Let me know how it goes and remember trim smarter not harder<G> 

Chip
 
 
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