[NSRCA-discussion] Guys I need help...

[Bob Harden]

Hello John,

I hope I will be able to help you with my experience when I built my Focus 
II.  The top of the fuselage where the canopy seats is where you should 
reference to set your wing incidence (don't reference from anywhere else as 
it may just confuse you).  If you want to orient the plane on the table for 
0 incidence (at the canopy) first then that would help overall just for the 
ease of reading the meter when adjusting the main wings.  Make sure the 
plane is fixed so it will not move while you are working with the wings. 
Next locate a wing panel to the fuselage and adjust for 1/4 degree positive 
and hold the wing in place using masking tape to the fuselage.  Check the 
incidence again using the incidence meter and if it hasn't moved, install 
the wing adjusters (make sure each aduster is in its center of travel before 
installing) to the fuselage using CA.  Repeat this procedure for the next 
wing panel.  After the wing adusters are installed, recheck the incidences 
on both wings and adjust if necessary using the wing adusters. Remember to 
make all adjustments referencing the top of the fuselage.  I had to make a 
small adjustment to the wings after I installed my adjusters.  I had read 
what others were doing when the flew their Focus II and they had to readjust 
their wing incidence to approx 1/8 degree positive to fly correctly, so I 
started with 1/8 degree positive before I flew the plane and that worked out 
well.  I also installed short screws to complete the adjuster installations 
to the fuselage.

Oh, one other thing. If you install the carbon fiber push rod for the 
elevator, you will need to install at least one (I installed two) foam 
bulkhead type formers to keep the pushrod from flexing while under load 
(when in the air).  If you don't install the formers, your elevater may go 
into oscillation during flight and this is a bad thing to have happen.

Good luck with it John.


----- Original Message ----- 
From: "John Konneker" <jlkonn at hotmail.com>
To: <nsrca-discussion at lists.nsrca.org>
Sent: Wednesday, December 27, 2006 10:10 AM
Subject: [NSRCA-discussion] Guys I need help...


>I am working on my Focus II.
> I have the wing adjusters for one wing installed.
> In order to minimize the chances of a less than level table to affect the
> incidence I decided to -0- the plane to itself.  The fuse sides at the
> canopy are supposed to be level with the "water line" so I put a level on 
> it
> to check...bubble at -0-.  I then double checked against the fin bed and 
> it
> showed level.  I put a Robart incidence meter on the wing, set the panel 
> to
> +1/4 deg and glued the wing adjusters on that side.
> This morning I was getting ready to do the other wing panel when I decided
> to do some measuring.
> Here is where I ran in to the unexplainable...
> I measured the wing leading edge to the table top and then the trailing 
> edge
> to the table top.
> I show approx. .15 inches positive!
> I measured the leading and trailing edge to the piin stripe down the fuse
> side (this stripe appears close to the water line) same positve incidence
> shown.
> I then rechecked with my incidence meter and got +1/4 deg with the fuse
> level...I then "reversed" the incidence meter to check to see if swapping
> ends had any effect...very little...maybe 1/8 degree...I can't read it 
> that
> close.
> I then traced the leading and trailing edges on the fuse side with a felt
> tip pin and rechecked my measurements to the table top and pin
> stripe...same.
> I am at a loss.
> How can I seem to be off this much?
> I could just cry....
> Any ideas?
> Thanks!
> JLK
>
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