Dual Elevator Thingy.

[Bob Pastorello]

No way would I go separate servos in the stab of the Excelleron.  Weight issues, and structure.  Don't know what's under the skin back there.
Also no way I'd do a pushrod, either.  The pull pull is just too easy, and there is an EASY and inexpensive solution to the clevis attachment point issue.

Bob Pastorello
NSRCA 199  AMA 46373
rcaerobob at cox.net
www.rcaerobats.net


  ----- Original Message ----- 
  From: Rcmaster199 at aol.com 
  To: discussion at nsrca.org 
  Sent: Monday, December 27, 2004 12:41 PM
  Subject: Re: Dual Elevator Thingy.


  Steve, Hyde engine mounts (and Hyde type, homemade units), are unsurpassed when it comes to engine vibration attenuation. I would wittle a little and fit this mount in.

  The smaller models are not as easily outfitted with dual servos at the stab. There would usualy be a CG or weight  penalty. Its a great solution for larger planes tho. 

  The MK belcrank is okay, except the main pushrod will need some support to keep it from shaking in synchrony. This set-up is surprisingly heavy even with single servo driving the whole contraption. 

  The twin carbon push rod set-up (that Nat Penton originated some 25 years ago, BTW) is an excellent alternate method. 

  My favorite is pull-pull because of the 4 point independent adjustment available, and overall lightness of the system. The lightest around at around 1/3 oz complete with clevises and couplers.

  BTW, thanks for the plug. When setting up pull-pull, simulate dynamic load on the surfaces by using rubber bands to pull the surface back to center (from behind the plane) when setting up cable tension. Light tension on the cables is far better than heavy tension BTW. Guitar string tightness will wear the servo out prematurely. Please remember, eye bolts only for the hook ups. I've had Dubro threaded couplers rip through steel cable before, so beware

  MattK

  In a message dated 12/27/2004 11:18:56 AM Eastern Standard Time, whisperingsmith at speakeasy.net writes:
    Greetings,
    I have need for some input. I'm running behind on my Epsilon project so 
    I bought an Excelleron to be sure I'll be able to compete (Dist. 8 
    Sportsman rookie) should the Epsilon not be ready when the monsoon 
    season ends here in the Pacific NW. I'm wondering what you fellow 
    fliers of this model (Excelleron) are doing for elevator linkage??? I 
    DO NOT want to run elevator  pull-pull so it looks like either Troy's 
    DEP gizmo or an MK doo-hicky. However, upon examining the fuse it would 
    seem like dual servos are possible as well. I just picked up some JR 
    DS3301's (God bless ebay) & after sending them in for inspection 
    they'll be awaiting a good home - elevators?.
    Power will be courtesy of either my YS 91 or 110 because I'd rather fly 
    than spend the day trying to get a dumb-stroke to run properly  (Flame 
    suit currently being mended so be gentle).
    Anyhoo, could I get some idea of any balance or other problems I might 
    incur with my engine & possible tail mount servo choice? I'd also like 
    to know what ya'll (for you guys east of me - youse if you're real 
    east) are doing for engine mounts. Will the stock mount take a YS 110? 
    I have a Hyde mount which I'd prefer to use but it looks like some 
    whiitlin' (ca'van) might be in order.
    You guys are  a TREASURE of information & fun when yer not fightin n' 
    fussin like wet hens!!!!
    Steve B.

    PS Anyone needing pull-pull cable (rudder or otherwise)- Matt has the 
    best stuff I've come across! Email him at Rcmaster199 at aol.com
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