Chip

[Dean Pappas]

Hi Jay,
Funny you should ask. Hey Nat, got any pictures of the old UM2?
The answer, short of showing you a picture of one of Nat's old designs is to build a plane that is symmeterical around the thrustline. It's gonna look fuunny but, "chins are bad, Hmmkay".
You want to center the fin and ruder area heightwise on the thrustline, too.
If you can design a plane with nose area above the spinner and almost none below, you might get there.
Some EU1-As trimmed with almost no right thrust, mine was one of those.
Brown had a Phoenix 6 or 7 that had a tiny fraction of a degree of left thrust, as I recall.
Even if you don't entirely eliminate the need for side thrust, if you get it under a degree and a half, the compromise and unwanted dog-tracking gets much much better.

Of course, electrics don't need chins! That's probably where the funky anti-Kirk Douglas chin on the Onyx comes from.

Dean Pappas
Sr. Design Engineer
Kodeos Communications
111 Corporate Blvd.
South Plainfield, N.J. 07080
(908) 222-7817 phone
(908) 222-2392 fax
d.pappas at kodeos.com


-----Original Message-----
From: discussion-request at nsrca.org
[mailto:discussion-request at nsrca.org]On Behalf Of Jason
Sent: Thursday, March 03, 2005 9:52 PM
To: discussion at nsrca.org
Subject: RE: Chip


Dean,

What's this cure look like?

Jason

-----Original Message-----
From: Dean Pappas [mailto:discussion-request at nsrca.org]On Behalf Of Dean Pappas
Sent: Thursday, March 03, 2005 7:40 PM
To: discussion at nsrca.org
Subject: RE: Chip


Hi Nat,
It's the push to level inverted from a down line: left rudder is required to go straight.
It's worse there than anywhere else, but the same effect can  be felt in many places.

The cure is to design planes that don't need right thrust.
Dean


-----Original Message----- 
From: discussion-request at nsrca.org on behalf of Nat Penton 
Sent: Thu 3/3/2005 6:25 PM 
To: discussion at nsrca.org 
Cc: 
Subject: Chip


When Chip was talking about throt/rudder mix he was also talking about a problem with inverted exit from a vertical downline. Could somebody please explain the problem ?
                                       Nat
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