Speaking of power

[Dean Pappas]

Bob,
 You make a fine point: I hear people on this forum, and elswhere, talking about mid to high eight-thousands and wonder how they are meeting the noise, whether it be AMA or FAI.
I don't see propping a two stroke above 8,000, they just get loud. (a 17-13N on a two stroke 140 turns 7,700 or so and a 17-12 gets loud in the air ... IMHO)
For the 4-strokes, the cam just wakes up at 8,000 on both the  YS DZ and FZ, I would think that we should be playing with props that turn in the very low 8,000s.
It's easy to forget the noise, especially as we are all drunk with the fantastic horsepower we have these days!
speaking softly,
    Dean
 

-----Original Message-----
From: Bob Kane [mailto:getterflash at yahoo.com]
Sent: Thursday, May 29, 2003 1:09 PM
To: discussion at nsrca.org
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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