No fixed tips?

[Bob Pastorello]

I have to agree about the "boxed in" setups being somewhat smoother, and having less wear and tear on the servos.
    And ARF-ers'  *are* doing it... both the Arresti I flew, and this Icepoint have tips on ALL control surfaces.  And I don't think they would do that if there wasn't at least a "belief" that they were needed.

Doubt that there's good scientific data about this on our models...but sure a lot of anecdotal evidence to support having tips installed!

Bob Pastorello
NSRCA 199  AMA 46373
rcaerobob at cox.net
www.rcaerobats.net


  ----- Original Message ----- 
  From: Troy A. Newman 
  To: discussion at nsrca.org 
  Sent: Saturday, January 29, 2005 8:26 PM
  Subject: Re: No fixed tips?


  They don't fly the same....and the aileron thru the tip thing wears out servo pots faster. I flew a model this past summer and it went thru aileron servo pots in 50 flights. I normally get well over 100-125 flights. And this was a wood model so the vibration was better damped than a composite fuse.

  Wing tips have lots of turbulence coming off of them...then stick a aileron in this turbulence. NOPE not the best from an engineering standpoint. 

  The answer guys and manufacturers give is it snaps better. My answer is design a good wing and it will snap better. Copy a good wing and it will snap better.  The ailerons become more effective with the area at the tip....but I don't feel it helps flight performance. Aileron thru the tip is much easier and faster to build than a boxed in version. on the ARFy stuff its cheaper...this is the biggest reason I think its done.

  As for elevators without tips there are no references. And the same things apply

  All my models have them boxed and will have them boxed in.

  Troy
    ----- Original Message ----- 
    From: Tim Taylor 
    To: discussion at nsrca.org 
    Sent: Saturday, January 29, 2005 7:46 AM
    Subject: No fixed tips?


    No fixed tips at the end of the wing/stab seems to be the rage. Any real reason for this? I really don't care for this very much as it makes it harder to make sure your trim is right and the elev half's meet.
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