[NSRCA-discussion] 4.8 volt Vs 6.0 volt

[Bill Glaze]

Because 1 escapement was used for rudder, a second was cascaded for elevator, and a third was used for high/low speed engine control.  Each was powered by it's separate (hand-wound after each flight) length of rubber, similar to Wakefield and other classes of rubber-band models.
This class, (an actual AMA class in the early/mid 50's) was Class 2.  Not unsurprisingly, the common slang term for it was "Mickey Mouse."

Bill Glaze
  ----- Original Message ----- 
  From: Jay Marshall 
  To: 'NSRCA Mailing List' 
  Sent: Thursday, March 09, 2006 2:15 PM
  Subject: Re: [NSRCA-discussion] 4.8 volt Vs 6.0 volt


  Escapements? What's with the plural?

   

  -----Original Message-----
  From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Bob Richards
  Sent: Thursday, March 09, 2006 2:00 PM
  To: NSRCA Mailing List
  Subject: Re: [NSRCA-discussion] 4.8 volt Vs 6.0 volt

   

  Ron,

   

  I remember when KPS-14 and KPS-15 were the servos of choice (or PLS-14 and PLS-15 for us Proline fans). Much simpler times.  No need for four digit servo numbers. :-)

   

  My first radio came with KPS-11 servos with the linear output racks. You know, pull-pull setups would be so simple with linear outputs.

  Now I expect all the REALLY old farts to chime in about having to wind up their rubber-band escapements before each flight. (Bill Glaze?? :-)

   

  I suspect the servos he has will be fine if the throws are kept down to the small amount needed for pattern.  However, the control surfaces are probably much larger than anything on pattern planes back in the 60s/70s, so the longer moments will be working harder against the servos.

   

  Bob R.


  Ron Van Putte <vanputte at cox.net> wrote:

     

    Third, you may not be aware, but 30 years ago many of us were using Kraft KPS-12 servos (smallest and lightest!) in .60 cu-in engine powered airplanes weighing up to 8 pounds.  The KPS-12 servo had a torque of 18 in-oz. Think about that for a while.

     

    Ron Van Putte



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