Zn-Line Alliance trimming question

[Peter Pennisi]

Hi Guys,

 

Yes, the model is a one piece wing. The model won the F3A World
Championships in 1999 in the hands of CPLR. 

 

Peter

  _____  

From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org] On
Behalf Of Nat Penton
Sent: Monday, 23 August 2004 6:02 AM
To: discussion at nsrca.org
Subject: Re: Zn-Line Alliance trimming question

 

Peter,

Does the Alliance have a one-peice? If so, the best approach

would be to add a dorsal. Cut it from light 3/16 sheet and tape it on for a
test.You can buy my lunch later.    

                                   Nat Penton

----- Original Message ----- 

From: Peter <mailto:pentagon.systems at bigpond.com>  Pennisi 

To: discussion at nsrca.org 

Sent: Sunday, August 22, 2004 6:30 AM

Subject: Zn-Line Alliance trimming question

 

Hey Guys,

 

I am starting to get a few flights under my belt with this model. I am happy
with the way the model performs in most areas except in rolls were rudder is
being used. My model suffers from severe pitching to belly in knife edge. I
think I am running about 17% on both left and right rudder. Mind you I fly
soft so it isn't as bad as it sounds. It is about 1/8th inch up elevator on
full rudder.

 

My problem is I am finding it difficult to roll cleanly for example in
reversed point rolls. My old model would do this without a problem (That
sort of excludes my ability being the problem). Whenever I touch the rudder
in any part of the roll the model gets all out of shape. If I roll
vertically either continuously or point rolls the model tracks perfectly.

 

The CG is exactly were CPLR runs his and the elevator trims neutral. The
model also dives and climbs perfectly straight. 

 

Anyone have any experience with this design? 

 

Why does this design pitch so badly in knife edge?

 

Can wing incidence be an issue here?

 

 

Regards,

 


Peter

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