Speaking of power

[Jon Uhler]

David,

Where does one get a 15.75x13 3 blade prop?

Thanks,

Jon

-----Original Message-----
From: David Lockhart [mailto:DaveL322 at comcast.net]
Sent: Thursday, May 29, 2003 9:05 PM
To: discussion at nsrca.org
Subject: Re: Speaking of power


I previously ran both the 17-12 and 17-12N on my 140EFI.  The 17-12 was 
only about 100 RPM less on the ground.  In the air, it was a very 
different story - the 17-12 actually unloads quite a bit more and is 
louder in the air.

The 15.75-13 3 blade - it is a little too much load for the 140EFI 
unless you run a lot of nitro.  That prop de-pitched to 11" turns right 
about 8,000.  Set rich, at 7,700, I think the last time I db'd with a 
good meter it was 89 db.  Very quiet and my favored prop for P03 and 
F03.

Dave Lockhart
DaveL322 at comcast.net



----- Original Message -----
From: wgalligan <wgalligan at cnbcom.net>
Date: Thursday, May 29, 2003 2:23 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
> 
> 
> -------------------------------------------------------------------
> -----------
>  Do you Yahoo!?
>  Free online calendar with sync to Outlook(TM).

=====================================
# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#

This transmission is intended only for the use of the addressee and may
contain information that is privileged, confidential, and exempt from
disclosure under applicable law. If you are not the intended recipient, or
the employee or agent responsible for delivering the message to the intended
recipient, this serves as notice to you that any dissemination,
distribution, or copying of this communication is strictly prohibited. If
you have received this communication in error please notify us immediately
via e-mail at the sender's e-mail address, delete this message from your
computer and/or computer network and destroy any hard copies that may have
been made. Thank you.
=====================================
# To be removed from this list, send a message to 
# discussion-request at nsrca.org
# and put leave discussion on the first line of the body.
#