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Old 06-17-2016 | 09:33 AM
  #36  
Jordia9
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From: Girona
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Hi Vince,

First of all I agree with you and Eggert, I had the same feelling on the plane, and it is not very sensitive to CG location.

In my case with the CG at 195:

-The plane tracks perfect
-I was carring a little up trim elevator ( about 1 mm).
-The plane was pulling to the canopy on down lines.
-The plane was pulling to the canopy on the right and left rudder knife edge ( same amount).
-The plane tends to roll at the same side as the rudder on knife edge.
-On up verticals the plane tends to the right.

As the plane don't have incidence adjusters i decided to go rear with the CG to get 0 trim on the elevators.

At first i felt the plane was tracking worst, but I reduced the throws and put more expo to get the same feelling (this part is very important on rudder , I use very little travel).

What I get at 235 ( assuming the center of the wing tube is at 220) :

-The plane tracks well (maybe needs more ailerons work to fly level, slow fly style)
-I have 0 trim on my elevators.
-The plane still pulls to the canopy on down lines, but less mix ( i have 3% thr-elev down mix)
-The plane still pulls to the canopy on right and left knife, but less mix ( 2,5 % right and left rud-down elev.)
-On up verticals the plane still goes to the right.

I tried more rear but i didn't like the plane and the mixes still there only 1% less.

I decided to decrease the engine right thrust about 1 degree, and now the up verticals are close to perfect ( I did this last Saturday and I need to re-do mixes).

I fly at 235 on calm days, on windy days I do the same as Eggert, I move the batery pack forward about 20 mm.

I'm running a Q80 14xs with a RS 21x14W M2 and this plane is capable to fly very slow.

I think this is an awesome plane for it's price and quality (pictures don't do justice)

As always this is a matter of flying preference but don't be afraid to go rear.

Jordi

Last edited by Jordia9; 06-17-2016 at 09:52 AM.