Elan trouble

Thu Jun 30 12:04:06 AKDT 2005

I just thought Jim has seen a picture of me somewhere and was hinting that I 
needed to "slide a little forward on the board".:-)

Ken
----- Original Message ----- 
From: "Jim Ivey" <jivey61 at bellsouth.net>
To: <discussion at nsrca.org>
Sent: Thursday, June 30, 2005 12:46 PM
Subject: Re: Re: Elan trouble

>   Hummph
> I coulda said fat girl.......wanna start something?
>
> Jim I
>>
>> From: "Nat Penton" <natpenton at centurytel.net>
>> Date: 2005/06/30 Thu PM 12:43:58 EDT
>> To: <discussion at nsrca.org>
>> Subject: Re: Re: Elan trouble
>>
>> OK Jim , you've gone too far. Let's leave the fat boy out of this.
>>
>> ----- Original Message ----- 
>> From: "Jim Ivey" <jivey61 at bellsouth.net>
>> To: <discussion at nsrca.org>
>> Sent: Wednesday, June 29, 2005 10:25 PM
>> Subject: Re: Re: Elan trouble
>>
>>
>> >
>> >> Ken
>> > Good theory. It's like the moments on a see-saw. The fat boy has to sit
>> > closer to the pivot than the skinny guy.
>> >
>> > Jim Ivey
>> >> From: "Ken Thompson" <mrandmrst at comcast.net>
>> >> Date: 2005/06/29 Wed PM 09:56:35 EDT
>> >> To: <discussion at nsrca.org>
>> >> Subject: Re: Elan trouble
>> >>
>> >> Jerry,
>> >> I was having a problem balancing a plane a couple of years ago.  I
>> >> figured
>> >> out that weight on the tail has about 4 times the balancing effect 
>> >> that
>> >> weight on the nose does.  This is due to the fact that my plane had 
>> >> about
>> >> 4
>> >> times the distance to the CG than the firewall did.
>> >> This could be the effect of your glass and paint on your tail 
>> >> feathers, 3
>> >> extra oz. of glass and paint would be close to the weight you need on 
>> >> the
>> >> nose to balance, if you use the multiple of 4.
>> >>
>> >> Just a theory,
>> >>
>> >> Ken
>> >> ----- Original Message ----- 
>> >> From: "Jerry Wilson" <JWilsonJr at houston.rr.com>
>> >> To: <discussion at nsrca.org>
>> >> Sent: Wednesday, June 29, 2005 9:35 PM
>> >> 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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