[NSRCA-discussion] 4 blade spinner

[Kelly Regan]

I will order a extra head shim. 

My setup is as follows,
OS 140RX
Aeroslave composite pipe (30-3/4" from outlet to glow plug).
Mac's header full length 7.1 inches from end to face of flange.

Dave, 10" 3b ?   is that the repitched prop?

I will do 3, 4 or 2 blade, whatever works best.   I would like to
get the proper spinner the first time however. ;)    So I guess I need
to decide on the number of blades and stick with it.

I will only be flying sportsman if that makes a difference?

DaveL322 at comcast.net wrote:
> Ditto on the extra headshim, 20%, OS-F, EFI bearing, longer pipe, and 
> propping for 7500 - 7800.  I ran the RX and EFI this way fo 5 years.  
> On the RX in particular, what pipe and what length will have a pretty 
> dramatic effect on the peak power and midrange transition, and to a 
> lesser extent, the "best" idle mixture (the idle mixture has some 
> effect on the midrange transition up to about 1/3 throttle).  The idle 
> compromise is usually this - richer is better for spool down and 
> braking, but leaner is better for midrange transition.
>  
> The 15.5-12 4b will work, but vertical is not nearly as good as the 
> 10" 3b or 18.1x10.1 2b.
>  
> Regards,
>
> Dave
>  
>
>     -------------- Original message --------------
>     From: "Dr. Mike Harrison" <drmikedds at sbcglobal.net>
>
>     > 2 things I recommend are adding an additional head shim so that
>     there are 2
>     > head shims and lengthening the pipe a couple of inches from the
>     standard
>     > setup. I use the OS F plug and 20% pro blend Cool Power.
>     > We have recently found the idle needs to be pretty lean.
>     > I get very strong performance and very smooth transition.
>     > One more thing, be sure to change the rear bearing to the EFI
>     bearing. This
>     > can be purchased from Tower Hobbies.
>     >
>     > The key to quiet engine performance is not to trun too much rpm
>     with the
>     > 18.1x10w. The plane will be very quiet and have great power if
>     you are
>     > turning 8000rpm or less.
>     >
>     >
>     > Mike
>     > ----- Original Message -----
>     > From: "! wgallig an"
>     > To: "NSRCA Mailing List"
>     > Sent: Tuesday, November 21, 2006 7:50 AM
>     > Subject: Re: [NSRCA-discussion] 4 blade spinner
>     >
>     >
>     > >I think you will find the 18.1x I0W APC To be a good prop for
>     that engine.
>     > >
>     > > Wayne Galligan
>     > >
>     > > ----- Original Message -----
>     > > From: "Kelly Regan"
>     > > To:
>     > > Sent: Monday, November 20, 2006 9:39 PM
>     > > Subject: [NSRCA-discussion] 4 blade spinner
>     > >
>     > >
>     > >>I am getting ready to order the last few items for my 140RX
>     > >> powered Brio.
>     > >>
>     > >> I read some good things about the APC 15.5 x 12 4 blade
>     > >> prop and thought I would give that a try.
>     > >>
>     > >> My problem is I don't see a! 4 blad e spinner in 3 3/8" or 3
>     /1/2"
>     > >> that will fit the Brio. 3" looks way to small and I think it
>     might
>     > >> look funny on the Brio.
>     > >>
>     > >> Any idea's ?
>     > >>
>     > >>
>     > >> --
>     > >> ______________________________________________
>     > >>
>     > >> Kelly Regan
>     > >> www.reganbrothers.com
>     > >> Home Page: http://mysite.verizon.net/vze6uror/
>     > >> ______________________________________________
>     > >>
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>     > >>
>     > >>
>     > >
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-- 
______________________________________________

Kelly Regan
www.reganbrothers.com
Home Page: http://mysite.verizon.net/vze6uror/
______________________________________________