Excelleron with OS 91FX in Intermediate ?

[Bob Pastorello]

I am flying mine with 15 degrees elev/aile.  It is not overly-senstive at all, and certainly NOT "3D" type action.  I also fly the plane slower, and surely now with the ST, it will likely NEVER be "flat out", as parts would shed.
    Things look deceiving in that department.  It is a a VERY large volume fuselage, lots of frontal area, and a very thick wing, with not a LOT of taper in the airfoil.  I'd guess it's in the 13% range, and it slows things up a LOT.
    The 15 degree permits very nice snaps, and rudd/elev spins are this slow, graceful looking thing.

But it will do tumbles pretty nicely, too!

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


  ----- Original Message ----- 
  From: Terry Terrenoire 
  To: discussion at nsrca.org 
  Sent: Tuesday, December 21, 2004 10:50 PM
  Subject: Re: Excelleron with OS 91FX in Intermediate ?


  I just got mine today. At first glance it looks GREAT! Guess I am leaning toward using my YS 120NC in it, but still considering the YS 91. My 91 is turning a 15x8 at about 8k on an 8# G-Trick, and it has plenty of climb.

  Can someone who is flying one, let us know how much elevator throw you are using. This thing looks like it is designed for the 3D type flying. Very large, and counter balanced elev. Would be easy to get too much throw!

  Terry T.


  On Tue, 21 Dec 2004 21:23:01 -0600 "Bob Pastorello" <rcaerobob at cox.net> writes:
    The 1.20 class two-strokes in this airplane will probably provide the best power at the lightest overall weight.  The ST is overkill, and added about 8-9 oz overall more than should have been there, because it starts out at 31 oz, then add the exhaust system.  Most of the 1.20's, I think, are coming in at 31-33 oz WITH exhaust systems, and that reduces wing loading about 2 oz/sq.ft.

    I'm ready to test hop, awaiting the header, which is in process.  It is surprising to see this one design catch on so rapidly.  Was it price?  Performance?

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


      ----- Original Message ----- 
      From: Randy 
      To: discussion at nsrca.org 
      Sent: Tuesday, December 21, 2004 9:10 PM
      Subject: Re: Excelleron with OS 91FX in Intermediate ?


      I order a Tiger Shark 1.20 for my excelleron90.  Should be about right.
      Randy
        ----- Original Message ----- 
        From: Paul Horan 
        To: discussion at nsrca.org 
        Sent: Tuesday, December 21, 2004 6:37 PM
        Subject: Re: Excelleron with OS 91FX in Intermediate ?


        Bruce,
            Thanks, that's what I am concerned about.  The OS 91 FX most likely will require a pipe to do the job and the Excelleron
        is not set up for a pipe.  I may have to resort to a larger 2 stroke engine.  Bob Pastorello is using a Super Tiger 2300.
        Not sure I wish to go that big !
        Thanks,
        Paul
          ----- Original Message ----- 
          From: Pattrnflyr at aol.com 
          To: discussion at nsrca.org 
          Sent: Tuesday, December 21, 2004 5:22 PM
          Subject: Re: Excelleron with OS 91FX in Intermediate ?


          I have a scratch built Typhoon 909 that weighs around 8 to 8.5 pounds.  The "Littlephoon" has 909 square inches of wing, about a 70 inch wing span.  I fly intermediate at 5500 feet MSL.  The YS91 did not have enough to fly the Int pattern, because of the two maneuvers you mentioned.  I put a YS 110 in the Littlephoon, and now I have plenty of power swinging a 15X8.  I have no experience with the OS, but I would think the YS would be a little lacking. 

          See ya,

          Bruce 
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