Elan trouble

[Jerry Wilson]

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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