Speaking of power

bryan patriot at eatel.net
Thu May 29 13:08:04 AKDT 2003


Hey Dave could I twissssst your arm into Twisting me a couple of those three
bladers?
I really liked them when I flew them last year
I tryed twice and failed to get the prop like yours it unloades and has no
pull
I would gladly trade for some of my home made jobs
BTW I have two injectors coming from Stokes  let me know if you need to
borrow one
Bryan
WWW.EXECUTIVEAIRFRAMES.COM
----- Original Message -----
From: David Lockhart <DaveL322 at comcast.net>
To: <discussion at nsrca.org>
Sent: Friday, May 30, 2003 2:04 AM
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
> >
> >
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