3 blade prop

[Wayne Galligan]

DAVE,

    Email me off line.

wgalligan at goodsonacura.com

thanks

Wayne

----- Original Message ----- 
From: "David Lockhart" <DaveL322 at comcast.net>
To: <discussion at nsrca.org>
Sent: Tuesday, July 12, 2005 6:13 AM
Subject: Re: Re: 3 blade prop


> Now we're getting to the meat of the issue - things like weight, drag,
> engine power, engine torque, flying style, and relative priorities for top
> speed, acceleration, downline braking, and noise are not the same for all
> pilots - so there is no optimum prop that matches everyone.
>
> I've been repitching the 15.75-13 to 10, 11, or 12 pitch depending on what
> guys want - I usually find out as much from them as I can about the above
> variables and then make a suggestion as to what prop to try.  Some don't
> feel they have the power to turn the 10", while others are running the
stock
> prop.  I mostly run the 11", but sometimes run the 10 or the 12 - depends
on
> the particular engine and the weather conditions.
>
> Dave
>
> ----- Original Message -----
> From: "wgalligan" <wgalligan at cnbcom.net>
> To: <discussion at nsrca.org>
> Sent: Monday, July 11, 2005 9:21 PM
> Subject: Re: Re: 3 blade prop
>
>
> > I had the oportunity to try 3 diferent props back to back at the
Nedeland
> > contest on Sat night.
> >
> > 1.17x12 reg 2 blade APC
> > 2. 16x11 GSW(Clevland) 3 blade c.f.
> > 3  15.75x11 3blade APC that was a Dave Lockhart re-pitch.
> >
> > My observations
> >
> > 17x12 best overall for penetration and power in the verticals but the
> faster
> > of the three on the downline.
> > 16x11  good overall speed but lacks in the vertical in pulling or
pushing
> > the model into a vertical, slowed down more then the 17x12
> > 15.75x11 good speed management and when pulling through looping
segmments
> > seemed to have much more authority.  It felt as if I took out some of
the
> > expo in my elevator on the pulls. When slowing down for the spin entry
it
> > was like putting on the brakes I had to carry a touch more power to the
> spin
> > entry.
> >
> > For windy conditions the 2 blade and for calmer conditions the Lockhart
3
> > blade seem to be the two best suited for my OS on my wide body
> > airplane(Aries).
> > On my Entropy, a faster design less drag, the GSW 16x11 works fine.
> >
> > Thanks to Brian Hebert for letting me try his Lockhart prop as it gave
me
>
> an
> > opportunity to see the true difference in prop selection side by side.
> > As Brian pointed out to me every airplane has its one prop that seems to
> > match its speed and performance envelope.  So what works for me may not
> work
> > for you or your friends.
> >
> > Smooth FLying...
> >
> > Wayne Galligan
> >
> >
> > ----- Original Message -----
> > From: "Karl G. Mueller" <kgamueller at rogers.com>
> > To: <discussion at nsrca.org>
> > Sent: Monday, July 11, 2005 7:22 PM
> > Subject: Re: Re: 3 blade prop
> >
> >
> > > Bob,
> > >
> > > I just tried the 15.3/4 x 13 three blade APC and it is straining the
> > engine
> > > a little and the vertical is not as good. Best results I get with the
> 16.5
> > x
> > > 12
> > > two blade. Haven't tried to repitch the three blade.
> > >
> > > Karl G. Mueller
> > > kgamueller at rogers.com
> > >
> > >
> > > ----- Original Message -----
> > > From: <rcaerobob at cox.net>
> > > To: <discussion at nsrca.org>
> > > Sent: Monday, July 11, 2005 3:55 PM
> > > Subject: Re: Re: 3 blade prop
> > >
> > >
> > > > Randy - what pipe, length, nitro you using?  What rpm you getting
with
> > > that?
> > > >
> > > > My OS's will TURN the 13 pitch, but it is a strain I don't like to
put
> > on
> > > the motor.
> > > >
> > > > Bob Pastorello
> > > > >
> > > > > From: randy10926 at comcast.net
> > > > > Date: 2005/07/11 Mon PM 03:11:37 EDT
> > > > > To: discussion at nsrca.org
> > > > > Subject: Re: 3 blade prop
> > > > >
> > > > > I would think so.
> > > > >
> > > > > My os160 have no problems with an APC 15.75X13 three blade.  Since
I
> > > heard the pitch measure less for a Bolly than an APC, I wonder if a
> Bolly
> > > 18X10 would be enough prop.
> > > > >
> > > > > Randy
> > > > >
> > > > > -------------- Original message --------------
> > > > >
> > > > > Bob
> > > > >
> > > > > Do you think that a OS 1.60 will turn the Bolly 18x10 three blade
?
> > > > >
> > > > > Robert
> > > > >
> > > >
> > > > Bob Pastorello, El Reno, OK, USA
> > > > rcaerobob at cox.net
> > > > www.rcaerobats.net
> > > >
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