Speaking of power

[wgalligan]

opppss   this was at 8400 rpm BTW
  ----- Original Message ----- 
  From: wgalligan 
  To: discussion at nsrca.org 
  Sent: Thursday, May 29, 2003 1:23 PM
  Subject: Re: Speaking of power


  OS 1.40RX  17x12N APC 15% Cool Power on our own homemade c.f. 4 chamber pipe = 94 db    I think going to the regular 17x12 would be quiter.   Lots of carb and prop noise at this rpm level.

  Wayne

    ----- Original Message ----- 
    From: Bob Kane 
    To: discussion at nsrca.org 
    Sent: Thursday, May 29, 2003 12:09 PM
    Subject: Speaking of power


    Has anyone measured the sound levels of the larger two strokes turning the big props?  We measured a YS140DZ with ES pipe turning a 17X12 APC and came up with 96dB, right on the limit.   Just curious.


    Bob Kane
    getterflash at yahoo.com 


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