[NSRCA-discussion] the joy of trim (thrust Protractor)

[J N Hiller]

I “0” the fuselage center line, which goes through the stab and engine
centerline. I am trying to use “0” stab incidence. The wing is 3/4” below
the centerline and just over 1/2 degree incidence. Down thrust is 1 and
r-thrust is 1/2 degree. I got it a little tail heavy last fall and put it
back to about 38%, (big stab rev. 24%) which I was happy with before. I
screwed the set-up up some last fall trying to soften the nose drop when
pushing to inverted. I should know where I’m at by the end of July.
Jim

-----Original Message-----
From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Nat Penton
Sent: Tuesday, March 11, 2008 6:09 PM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] the joy of trim (thrust Protractor)

Thanks Jim. The protractor is neat. One of my problems is knowing when the
wing is level. I use a laser incidence meter and it is very good at
determining relative incidencies, not absolute. I might make the protractor
into a T so I can set the incidence meter on top.

One other thought, maybe I can determine what the meter reads on something
level then zero the wing.   Nat
----- Original Message -----
From: Derek Koopowitz <mailto:derekkoopowitz at gmail.com>
To: NSRCA Mailing List <mailto:nsrca-discussion at lists.f3a.us>
Sent: Tuesday, March 11, 2008 3:17 PM
Subject: Re: [NSRCA-discussion] the joy of trim (thrust Protractor)

So much easier to visualize when one has a picture...

Thank you Jim!
On Tue, Mar 11, 2008 at 12:48 PM, J N Hiller < jnhiller at earthlink.net
<mailto:jnhiller at earthlink.net> > wrote:
Chris, Matt's post yesterday reminded me that I wanted to make a thrust
angle protractor after reading it previously, here is a photo. I used 1" sq
hardwood and contact cemented the printed protractor (see pdf) on both ends
so I could check right thrust as well, noting equal measurement from the
tail.

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