[NSRCA-discussion] trimming

[james woodward]

Hi John - try this, jig up the tail of the plane until the fuselage looks
level and measure the down thrust off the spinner backplate.  I'm pretty
sure that if the spinner backplate matches the nose, then it is very
close.  Adjust until it is a bit negative of zero.  Then measure the wing &
stab from there, and you will have the relative numbers against each other.

Jim

On Tue, Oct 29, 2019 at 9:19 AM John Fuqua via NSRCA-discussion <
nsrca-discussion at lists.nsrca.org> wrote:

> Thanks for the feedback.    May be a while before I can try what has been
> suggested.    I start with the easy and move to the more involved.
>
>
>
> As a point of reference it’s a Zonda with a pletty for power.   21.5x13
> prop.    CG is right on manufacturers suggested point.    Determining
> thrust line, stab incidence is the difficult part.
>
>
>
> John
>
>
>
> *From:* NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> *On
> Behalf Of *Dave Burton via NSRCA-discussion
> *Sent:* Tuesday, October 29, 2019 7:52 AM
> *To:* 'Vicente Bortone' <vincebrc at gmail.com>; 'General pattern
> discussion' <nsrca-discussion at lists.nsrca.org>
> *Subject:* Re: [NSRCA-discussion] trimming
>
>
>
> As we also know, there’s no such thing a too much power. And way, way, too
> much is about right!
>
>
>
> *From:* NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> *On
> Behalf Of *Vicente Bortone via NSRCA-discussion
> *Sent:* Tuesday, October 29, 2019 8:30 AM
> *To:* Stuart Chale via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
> *Subject:* Re: [NSRCA-discussion] trimming
>
>
>
> John,
>
> You got very good information.  For sure we would like to know if you fix
> it and what you did.  Something that I would like to add.  Just use the
> correct amount of power required to do the up line.  As we know, too much
> power corrupts.
>
> Good luck,
>
> .
>
> Vicente "Vince" Bortone
>
>
>
>
>
> On Tue, Oct 29, 2019 at 6:37 AM Stuart Chale via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org> wrote:
>
> Which airplane?  Not all designs behave the same way.  I had one modern
> design plane that no matter what I tried always pulled to the canopy in the
> vertical.
>
> But as already mentioned start with incidences.  Positive in the wing will
> help. If the incidence is correct to start then move the CG back.  Finally
> add downthrust.
>
>
>
> My Hebert designed planes have always been very sensitive to CG in this
> respect.  My Mythos much less so.
>
>
>
> Stuart
>
> Sent from my iPad
>
>
>
> On Oct 28, 2019, at 5:53 PM, wayg2013 via NSRCA-discussion <
> nsrca-discussion at lists.nsrca.org> wrote:
>
> 
>
> Down thrust
>
>
>
>
>
>
>
> Sent via the Samsung Galaxy S7, an AT&T 4G LTE smartphone
>
>
>
> -------- Original message --------
>
> From: John Fuqua via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
>
> Date: 10/28/19 4:43 PM (GMT-06:00)
>
> To: NSRCA <nsrca-discussion at lists.nsrca.org>
>
> Subject: [NSRCA-discussion] trimming
>
>
>
> Real quite on the list.   Need some advice.    What is the trimming fix
> for a plane that is pulling to the canopy in a vertical upline ??
>
>
>
>
>
> John
>
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