Looking for light servo extensions: ABBRA

[Edward Skorepa]

The zdz40 powered ABBRA comes typically 1-2oz under 11lb with following equipment: stock (supplied) landing gear, wheel pants, spinner, cf wing &stab tubes. CF tuned pipe, light wooden two blade prop, light wheels, light DuBro tail wheel bracket, 14-16oz two line fuel tank, JR 770 PCM receiver, NMP 2000 Lion airborne battery pack with Jaccio perfect switch, 4cell NiCd 800mAh JR square pack for ignition with light switch harness or 2 cell Lipo 1200 with Jaccio perfect switch, JR 3021 for throttle, two mini's for elevator, JR 9411 for ailerons, one servo only for rudder, three 18" HD extension cables for tail, two 12" HD for ailerons. Also, 20g can be cut and grinded off of the Walbro carburetor, ignition cables can be shortened. ed
  ----- Original Message ----- 
  From: J.Oddino 
  To: discussion at nsrca.org 
  Sent: Thursday, April 14, 2005 9:46 AM
  Subject: Re: Looking for light servo extensions: ABBRA


  One thing you could do is build a special harness to go to the tail that consisted of two 18 ga. wires for power  and three 26 ga. wires for the rudder and two elevator servo signals (assumes three channels being used).  In the tail you could fan it out to three very short female connectors.  Not sure it is worth the trouble but could save weight.
  Jim O
    ----- Original Message ----- 
    From: vicenterc at comcast.net 
    To: discussion at nsrca.org ; discussion at nsrca.org 
    Cc: John Pavlick 
    Sent: Wednesday, April 13, 2005 11:42 AM
    Subject: RE: Looking for light servo extensions: ABBRA


    John:

    I am sorry that took me so long.  The extra heavy duty extensions are in the plane and I can not weigh those.  I have 12" long JR extensions.  The heavy duty is 5 grs.  The light duty is 4 grms.  That is only 1 gr. difference but is 25% more than the light duty.  I think the extra heavy duty could be around 50% more or 8 grms.  We have a lot of extensions in the ABBRA gas version.  If we assume 8 ft of EHH exteansions we could save 32 grms. or 1.02 oz.  It is not much but it is 1 oz.

    Vince



      -------------- Original message -------------- 

      Vince,
       Just wondering - how much do all of your servo extensions weigh right now?
      John Pavlick
      http://www.idseng.com
        

        -----Original Message-----
        From: discussion-request at nsrca.org [mailto:discussion-request at nsrca.org]On Behalf Of vicenterc at comcast.net
        Sent: Friday, April 08, 2005 1:30 PM
        To: NSRCA
        Subject: Looking for light servo extensions: ABBRA


        Hello all,

        I need suggestions to make servo extensions as light as possible. This is for the new ABBRA with gasoline engine and we have the servos in the back to better balance the plane.  I think we can save some weight if we can get very light servo extensions.  We are using 4 digital servos JR 3241 in the tail.  One for each elevator and two pull-pull configuration for the rudder.  The plane right now is about 6 oz over 11 pounds and we are looking for places to reduce the weight. 

        Thanks,

        Vince
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