RCU Forums - View Single Post - Composite ARF Impact
View Single Post
Old 02-22-2008 | 02:42 PM
  #766  
PeterP
 
Joined: Feb 2003
Posts: 493
Likes: 0
Received 1 Like on 1 Post
From: Brisbane, AUSTRALIA
Default RE: Impact

Hi Jeff,

Congratulations on the model. It looks great.

I have been flying my model for close to 3 years and it is still going strong with DZ160 power. When I test flew my model it trimmed out with a little down elevator and it felt very floaty in the wind. In my previous posts I mentioned the incidence changes I made as a result which I feel improved the model. The modele is quite sensitive to CG changes, I found the best compromise for CG was when it balanced on the rear of the tube with wings removed.

In your case I would add the adjusters because if you try to adjust your wing to remove your down trim you are going to screw up your thrust line. The inbuilt down thrust is marginal on this model and it needs a little more. I increased down thrust by adding more positive incidence on the wing and then reseting my stabs to remove any elevator trim. The other benefit to doing this was it raised the tail of the aircraft in level flight which makes the model present better with a more locked in feel. It also reduced my elevator to rudder mix to almost nothing. Couldn't be happier with the changes. Adding stab adjusters is not difficult in this model. The gator units available from Central Hobbies work well, if I recall correctly I remember posting some pictures in the build thread.

Good Luck,

Peter