OS91FX Prop on Exelleron90

[Bob Pastorello]

Off the top of my head, I'd have to guess that is gonna be too much prop.  INcreasing RPM is usually for a given prop that they reference.  More rpm doesn't mean more torque, and sometimes, the higher pitch/size means you really need lots more punch.

If you went from th 8 to a 10 pitch, probably see more rpm, and still be in the torque band of the motor, but this is pure specualation.  Don't know a thing about those mufflers.

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


  ----- Original Message ----- 
  From: Randy 
  To: discussion at nsrca.org 
  Sent: Wednesday, December 15, 2004 5:27 PM
  Subject: OS91FX Prop on Exelleron90


  Ok I ordered an Ultrathrust tuned muffler for my OS91FX on the Excelleron.  Since one of the reasons for building the plane and picking a setup is for use at pattern primers, and I wanted an easy straight forward setup.  Anyway thinking of changing the 13X8 apc for a 15X8 APC when I put on the Ultrathrust tuned muffler.  They say you get 1k to 1.5K increase in top end by using this product.  This should put the 15X8APC at approx the same RPM as the 13X8 on the stock muffler.

  Any suggestion or am I totally off the wall on this one?

  Randy
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.f3a.us/pipermail/nsrca-discussion/attachments/20041215/9cd92ea7/attachment.html