Elan trouble

[Jim Ivey]

 Jerry
 Ok it is solved why.  The tail being painted, glassed with primer, etc is the problem. Usually only the verticle stab gets painted on a FG fuse. The horiz,elevators and rudder get monocoted or ultracoat or some film coating. This is not near as heavy. There is a lot of weight at the rear in paint and at that distance from the CG has caused your problem.
 I hate to say, but another set of elevators stabilizer and rudder, covered in film coating is your solution. The alternative is to add the weight and fly it. It'l be a little heavy and fast but should groove good.
Good luck

Jim Ivey
> 
> From: "Jerry Wilson" <JWilsonJr at houston.rr.com>
> Date: 2005/06/29 Wed PM 09:35:40 EDT
> To: <discussion at nsrca.org>
> Subject: RE: Elan trouble
> 
> Jim,
> 
> I don't know why it is tail heavy.  I was very surprised.  CG is noted on
> the plan. Fuselage is painted as are horizontal stab, elevator, and rudder
> which were also glassed.    Could be my glassing and paint job is heavy
> although I would not have thought so much weight could be attributed to
> this.  Rudder and Elevator servos are over the wing trailing edge as per
> plan.  Battery pack has been moved to the firewall.  Used Central carbon
> fiber push rod for elevator to MK dual bellcrank and MK control horns.  Push
> pull cable on rudder.  Receiver and throttle servo are about at the CG.
> 
> Jerry
> 
> -----Original Message-----
> From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
> Behalf Of Jim Ivey
> Sent: Wednesday, June 29, 2005 5:24 AM
> To: discussion at nsrca.org
> Subject: Re: Elan trouble
> 
> Jerry
>  Why is it  tail heavy. Maybe you are using the wrong CG point or did you
> put servos in the tail? Is the tail painted. I think figure out why, then
> solve the problem that way instead of adding all that weight.?
> 
> Jim Ivey> 
> > From: "Jerry Wilson" <JWilsonJr at houston.rr.com>
> > Date: 2005/06/29 Wed AM 07:14:53 EDT
> > To: <discussion at nsrca.org>
> > Subject: Elan trouble
> > 
> > I have a dilemma and could use some advice from the group.
> > 
> >  
> > 
> > After over a year of building I have nearly completed my Elan which is my
> > first attempt to build a fiberglass fuse pattern ship.  It is painted,
> > covered, servos, push rods, and engine (120 four stroke) installed.
> Weighs
> > about 9 lbs.  Looks pretty nice.
> > 
> >  
> > 
> > The trouble is to get it to balance at the CG point on the plan (8" from
> > wing LE) requires 11 oz in the nose.
> > 
> >  
> > 
> > According to Dick Hansen's plan the weight should be 8 - 10 lbs.  So it is
> > still within the design range, at ~9.75 lbs.  But even if I can figure a
> way
> > to add 11 oz of weight to the nose, I'm afraid the plane will not fly the
> > pattern well and am having serious doubts completing.  My intentions were
> to
> > fly one or two more Sportsman contests with it and then move on to
> > Intermediate.  Would appreciate some opinions/advice from the group:
> > 
> >  
> > 
> > Should I try to figure out a way to add 11 oz wt. to the nose securely and
> > finish the plane?
> > 
> >  
> > 
> > Or abandon the ship and move on to something else?
> > 
> >  
> > 
> > TIA
> > 
> > Jerry
> > 
> > 
> > 
> 
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