3 blade prop

[Wayne Galligan]

Good question Bob,

I didn't really pay that much attention to that factor as I only put one
flight on per prop.   But I did like the way David's prop tractored through
the pulls and the way it slowed down going into the spin entry. The 11 pitch
seemed to be just about the right load  for the OS 1.40 and Aeroslave pipe
setup too.

What are your thoughts on the rudder work load?

Wayne

----- Original Message ----- 
From: "Bob Pastorello" <rcaerobob at cox.net>
To: <discussion at nsrca.org>
Sent: Monday, July 11, 2005 8:36 PM
Subject: Re: Re: 3 blade prop


> Wayne - which of the three had the least rudder workload?
>
> Bob Pastorello
> www.rcaerobats.net
> rcaerobob at cox.net
> ----- Original Message ----- 
> From: "wgalligan" <wgalligan at cnbcom.net>
> To: <discussion at nsrca.org>
> Sent: Monday, July 11, 2005 8:21 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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