[NSRCA-discussion] First day out with OS 140RX (somewhat long)

[David Lockhart]

Brett,

Assuming you like the AC and it is running well, I would leave it alone as Ed says.  If you swap to a 2C, you may have some CG issues to work out - especially depending on what exhaust system you are using now with the 4C and which one you choose for the 2C.

For 2C choice, in the northeast, we've not seen many of the Mintors, but we've seen them run well at the NATs.  I'd not go with the OS160 because is heavy (but cheapest and plenty of power and reliability).  To me, the choice is really between the 140RX and the Webra160.  And the bottom line is that you be able to pretty easily setup an OS140RX to give good power, good throttle response, and excellent reliability.  With the Webra, it will take some setup time and more attention is needed to keep the Webra in the "sweet" spot and then it makes tons of torque and power more efficiently (less fuel) than the OS.

Regards,

Dave Lockhart
DaveL322 at comcast.net

  ----- Original Message ----- 
  From: Ed Miller 
  To: NSRCA Mailing List 
  Sent: Friday, March 03, 2006 7:27 AM
  Subject: Re: [NSRCA-discussion] First day out with OS 140RX (somewhat long)


  Leave the AC in there. With a few tricks and 25 to 30% nitro you can swing a big prop in the high 7's to low 8's quietly and have more than enough power. 
  Ed M.
    ----- Original Message ----- 
    From: brett terry 
    To: NSRCA Mailing List 
    Sent: Thursday, March 02, 2006 11:03 PM
    Subject: Re: [NSRCA-discussion] First day out with OS 140RX (somewhat long)


    Dave,

    I have a YS 1.20AC (I think) with a Hatori pipe in my 2m plane.  If I were to upgrade to a new motor I would strongly consider 2-stroke for the price factor alone.  I think the YS 1.60 looks like a tremendous motor, but it is a lot of money in upfront cost as well as fuel. 

    What would you recommend?  The plane weighs 10#4oz now.  Should I look at the OS, Mintor, or Webra?

    Just curious,

    Brett


    On 3/2/06, David Lockhart <DaveL322 at comcast.net> wrote: 
      I agree that a good running YS is a great glow powerplant for pattern, and 
      the folks at YS Performance provide great service to the YS faithful.  And
      to get solid performance, you need only to slap on any one of a number of
      headers and mufflers at pretty much any length, dump lots of 30% nitro low 
      viz oil fuel, bolt on a prop that will hit sufficient RPM to bust the
      noisemeter at 80% stick, and set the needle.  Good power, good torque, and
      nice throttle curve are the likely result - along with plenty of noise and 
      vibration (relative to a 2C).




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