Servo question

[Wayne Galligan]

That was almost my point at the beginning of this thread.
Actually it was the battery draw thingy I was getting to but good points have come from the whole thread.

Wayne G.
  ----- Original Message ----- 
  From: Jeff Hughes 
  To: discussion at nsrca.org ; discussion at nsrca.org 
  Sent: Friday, August 01, 2003 8:31 AM
  Subject: RE: Servo question


  So, let me get this straight. You buy better servos, than make them  
  mushy with expo so the feel like the cheap servos, then decrease 
  travel to make them feel closer to the cheap servos. Sounds like the 
  cheap servos are what we're all looking for!


  > Glen
  > 
  > I have never been able to really reproduce that coreless feel, yet 
  with 
  > more control due to digitals. I added more expo but all surfaces 
  around 
  > center are still more active. I rarely under roll, always over roll. 
  Are 
  > you saying that if I reduce the travel of the servo, yet keep the 
  same 
  > surface deflection that it gets more controllable? If this is the 
  case I 
  > should easily be able to move up from 22nd place to 21st... 
  > 
  > 
  > 
  > Gray Fowler
  > Principal Chemical Engineer
  > Composites Engineering
  > 
  > 
  > 
  > 
  > Glen.Watson at aspentech.com
  > Sent by: discussion-request at nsrca.org
  > 07/31/2003 03:59 PM
  > Please respond to discussion
  > 
  >  
  >         To:     discussion at nsrca.org
  >         cc: 
  >         Subject:        RE: Servo question
  > 
  > 
  > Early this season I swapped my Futaba 9102 coreless wing servos for 
  9150 
  > digitals.  As Gray mentions I first added more expo to reestablish 
  feel. 
  > With this added expo (mushiness) when doing points and slow rolls it 
  was 
  > difficult to maintain a consistent roll rate.  By decreasing travel 
  volume 
  > (9ZAP AFR) in addition to reducing relative expo, roll rate became 
  more 
  > controllable and predictable. I sense there is a relative amount of 
  travel 
  > volume + expo needed to overcome surface blow back with non-digitals 
  to 
  > achieve desired mushiness.
  >  
  > Switching to digital wing servos has greatly changed the rolling 
  > characteristics for me in a positive way.  Rolls are crisper, more 
  > predictable in all air speeds and stop-start with more authority.
  >  
  > Glen
  >  
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