[NSRCA-discussion] the joy of trim

[Chad Northeast]

Sure, just need to program in an elevator reverse switch!  Just don't forget which position its in when landing LOL :)

Mike, thats what I do, but I am getting lazy :)  

Chad

----- Original Message -----
From: Derek Koopowitz <derekkoopowitz at gmail.com>
Date: Tuesday, March 11, 2008 3:05 pm
Subject: Re: [NSRCA-discussion] the joy of trim
To: NSRCA Mailing List <nsrca-discussion at lists.nsrca.org>

> Does this work when one is doing an inverted 45 as well?  LOL
> 
> On Tue, Mar 11, 2008 at 1:27 PM, <shinden1 at cox.net> wrote:
> 
> > Now,, we have the Harrison trim method <G>
> > Bryan
> >  ---- "Dr. Mike Harrison" <drmikedds at sbcglobal.net> wrote:
> > > Chad, hold a little up elevator!
> > > ----- Original Message -----
> > > From: "Chad Northeast" <chadnortheast at shaw.ca>
> > > To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> > > Sent: Monday, March 10, 2008 4:57 PM
> > > Subject: Re: [NSRCA-discussion] the joy of trim
> > >
> > >
> > > > Ok you trim masters, here is a tricky one for you.
> > > >
> > > > Bryan and I have been through this a bit last year but I 
> ran out of
> > time
> > > > before the Worlds to fix it and just flew with what I had.
> > > >
> > > > On my Twister I have this pesky problem, the setup is like so,
> > > >
> > > > wing = 1/2+ Bryans suggestion and I like it
> > > > stab = 0
> > > > motor = factory claims 2.5 down, have not measured but 
> could if asked,
> > I
> > > > have added more to cure a problem see below
> > > > CG = has been anywhere from 275 to 300mm from TE mostly 
> with the same
> > > > result.  Currently its around 285-290 and it feels 
> good at that point.
> >  45
> > > > ups inverted track almost hands off if under enough power.
> > > >
> > > > Symptoms,
> > > >
> > > > Plane flies well, at this setup I need 0 mix right rudder 
> to ele in
> > knife,
> > > > and about 2% up ele with left rudder in knife,
> > > > about 1/32" down elevator with idle to fix a downline
> > > > Added downthrust as the increase in wing inc. and more 
> forward CG
> > really
> > > > helped the mix in knife and made rollers easier, but 
> forced an
> > increase in
> > > > downthrust as the plane started pulling to the canopy on 
> uplines.> > > Downline mix remained the same.
> > > >
> > > > The big problem I cannot resolve is this, a 45 deg down 
> upright (motor
> > at
> > > > idle) the plane pitches to the belly and will not track on 
> its own for
> > any
> > > > length of time.  If I switch the idle-down mix off 
> its rock solid on
> > that
> > > > line.
> > > >
> > > > I am open to all suggestions now that I have a bit of time 
> to play
> > with
> > > > this, I hope Bryan chimes in some more as I would like to 
> continue> where
> > > > we left off last fall.  If you suggest something I 
> will do my best to
> > give
> > > > it a go and let you know how it works (provided it doesn't 
> snow!)> > >
> > > > The plane is basically super locked in with this setup, 
> except for the
> > > > silly 45 down upright, which is a problem in cubans and such.
> > > >
> > > > Comments and thoughts from the masters are most 
> appreciated :)  I
> > consider
> > > > myself one of the, cant really trim that well but can fly 
> through it
> > just
> > > > fine types :)
> > > >
> > > > Chad
> > > >
> > > > _______________________________________________
> > > > NSRCA-discussion mailing list
> > > > NSRCA-discussion at lists.nsrca.org
> > > > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> > >
> > > _______________________________________________
> > > NSRCA-discussion mailing list
> > > NSRCA-discussion at lists.nsrca.org
> > > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> >
> > _______________________________________________
> > NSRCA-discussion mailing list
> > NSRCA-discussion at lists.nsrca.org
> > http://lists.nsrca.org/mailman/listinfo/nsrca-discussion
> >
> 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20080311/f73e641a/attachment.html