[NSRCA-discussion] 4 blade spinner

[Dr. Mike Harrison]

Thanks Dave, 
Good to have validation of setup.  I will have to measure the distance.  I measure and forget, measure and forget,etc........
Mike
  ----- Original Message ----- 
  From: DaveL322 at comcast.net 
  To: NSRCA Mailing List 
  Sent: Tuesday, November 21, 2006 10:27 AM
  Subject: Re: [NSRCA-discussion] 4 blade spinner


  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/ 
    > >> ______________________________________________ 
    > >> 
    > >> _______________________________________________ 
    > >> NSRCA-discussion mailing list 
    > >> NSRCA-discussion at lists.nsrca.org 
    > >> http://lists.nsrca.org/mailman/listinfo/nsrca-discussion 
    > >> 
    > >> 
    > > 
    > > _______________________________________________ 
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    > 
    > 
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