Re: elevator trim, manual vs electric


Subject:    Re: elevator trim, manual vs electric
From:    Randy Utsey (randy@djdist.com)
Date:    Wed Nov 18 - 10:50 AM
Tom, I have 260 hrs  on my manual trim RV-7 and would do it again as the 
trim is so precise and sensitive and it can't break (or not very 
likely)!  1/4" adjustments at the trim knob are all that is required 
when you are nearing cruise speed and altitude.

Randy Utsey
RV-7 / N55CU
----- Original Message ----- 
  From: rveighta@comcast.net 
  To: rv-list@matronics.com 
  Sent: Wednesday, November 18, 2009 1:37 PM
  Subject: Re: elevator trim, manual vs electric


  Tom, I built an RV-8A with manual trim and an RV-8 with electric trim, 
and for me I'd go with the manual trim if I had it to do over in 

  another plane. Two reasons: first the manual cable seemed easier to 
install  and secondly and most important, the manual trim

  allowed me to precisely adjust trim for any speed. With the electric, 
precise trim at cruise speeds was dang near impossible.

  Just my 2 cents.....


  Walt Shipley


  ----- Original Message -----
  From: "thomas sargent" <sarg314@gmail.com>
  To: "rv-list" <rv-list@matronics.com>
  Sent: Wednesday, November 18, 2009 12:19:05 PM GMT -05:00 US/Canada 
Eastern
  Subject: elevator trim, manual vs electric

  I am doing final assembly on a 6A. I've never had the trim cable fully 
installed before and am running into various problems that have me 
reconsidering things.

  The manual trim has the advantage that it is not electric - no wiring, 
no dependence on the electrical system.  I also like the very positive 
connection from my hand to the trim tab.  But, (I'm guessing here) the 
electric looks like it's a lot easier to install.  It's probably also a 
lot lighter.  Though, I've heard lots of stories about the servo's 
running away.

  Have any of you converted from manual trim to electric?  Is the 
electric easier to install/live with?

  -- 
  Tom Sargent


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