Lancaster?

[JOddino]

Troy,
Tell us more about the contest and the electric.  I assume you didn't fly on Saturday because of the wind.  It was blowing so hard at my place Sunday morning that I didn't even check Lancaster until 10 and then found out it was calm out there.  Sounds like I missed some fun.
Jim
  ----- Original Message ----- 
  From: Troy Newman 
  To: discussion at nsrca.org 
  Sent: Tuesday, February 10, 2004 10:39 AM
  Subject: Re: What's a JR 9411SA servo?


  The 9411 is a mid sized servo. So it fits in the stab just like it would in a wing. I didn't look closely at Tony's setup. I know he is not using a matchbox. There is no need. Matchboxes are for using multiple servos on each surface. Basically all a matchbox does is act a "Y" harness that has subtrim, reversing, and end point adjustments in it.
  If you plug the two elevator servos into the RX in different channels you already have these features. Especially in the 10X as the dual elevator function is the simple flip of a software switch....then subtrim the servos independently, and reversing as needed...then set the end points and they are done.

  Where the matchbox shines.....is when you are running (4) servos per aileron.....Your RX only has 10 channels in it. So are you going to use 8 channels just to mix your ailerons together?  NOPE...So the question comes which servos get Y harnessed to each other and do you use (2) RX's and so on. The matchbox allows you to hook the entire wing panel to a matchbox and set each servo up independently for center, rev, Travel....then the match box just plug into one channel on the RX. Do the same thing for the left wing and now your setup is not much more than a normal pattern setup with only 2 ailerons servos as far as the TX is concerned.

  The Matchbox also has a neat feature where can power the servos on it separately from the RX power source...So you could put a switch and battery pack on the left wing, right wing, rudder, and elevator on a big model like Quique's Yak 54 or the big H9 Ultimate Bipe.

  The idea behind a matchbox is to make the complex model easy to setup....it allows matching of servos that are connected to the same channel in the RX. If you have a radio with dual elevator capability there is no reason for a matchbox in this application.

  I have seen H9 Funtana's with matchboxes on the elevators....and I have seen 25% extra's with dual RX's......Our pattern models are pretty simple in their layout. Even if using dual elevators....we are already using dual aileron servos and our radios are already setup to do it....both major radio manufacturers 9-10channel systems, the 8 channels, and I think even some of the 6 channel systems are now capable of the dual elevator setup and have been that way for years now.

  I don't think it is better than the CF rod setup I have been using....but if setup properly I think function is just as good. As Tony has said the dual elevator servos are a pain in the behind as the servo pots wear. The endpoints change the centers change. In talking with Tony when he was flying Ty 2+2's with the dual elev setup he was changing servos every 30 flights because the pots were starting to show wear.  If this is the case the then the setup time and pain in the behind of dual servos gets old quick. A single servo is easier to change and setup because there is no matching.

  Tony's theory is the Electric is going to much less servo wear...so the dual servos is no big deal. He isn't going to be changing the servos for 10,000 flights.....LOL...actually I'm joking but the electric has to be better on the servo pots. We'll see what happens. Also the newer digital servos that we have today are way better on pot wear and centering than the servos Tony was using back in the dark ages of 97'

  I know Quique uses dual elevator servos also. The Smaragd and Partner will tend to have a forward  CG if you use a single servo up front and build them stock. So Tony just built the model as close to the design intent for everything but the power system. It is a very impressive model. I enjoyed flying it. Only got 2 flights on it but one was a contest round of P-05.



  Troy
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