[NSRCA-discussion] APC 18.1 x 10W props

[wgalligan]

I though it was the fat prop that made him look so thin.

Wayno
  ----- Original Message ----- 
  From: Richard Strickland 
  To: 'NSRCA Mailing List' 
  Sent: Wednesday, November 15, 2006 5:15 PM
  Subject: Re: [NSRCA-discussion] APC 18.1 x 10W props


  Don't get your picture taken with Harrison--he makes everyone else look fat.        Hi Mike!

  Richard
    -----Original Message-----
    From: nsrca-discussion-bounces at lists.nsrca.org [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of Dr. Mike Harrison
    Sent: Wednesday, November 15, 2006 4:26 PM
    To: NSRCA Mailing List
    Subject: Re: [NSRCA-discussion] APC 18.1 x 10W props


    Yeah, Yeah, Yeah.......

      ----- Original Message ----- 
      From: Gray E Fowler 
      To: NSRCA Mailing List 
      Sent: Wednesday, November 15, 2006 2:49 PM
      Subject: Re: [NSRCA-discussion] APC 18.1 x 10W props



      Good God almighty! Mike Harrison on the list! Can Art Wagner be far behind? 



      Gray Fowler
      Senior Principal Chemical Engineer
      Radome and Composites Engineering
      Raytheon 

      nsrca-discussion-bounces at lists.nsrca.org wrote on 11/15/2006 02:41:42 PM:

      > Thanks George! 
      > ----- Original Message ----- 
      > From: george w. kennie 
      > To: NSRCA Mailing List 
      > Sent: Wednesday, November 15, 2006 12:03 PM 
      > Subject: Re: [NSRCA-discussion] APC 18.1 x 10W props 
      > 
      > Welcome to the list Mike!!!!! 
      > ----- Original Message ----- 
      > From: Dr. Mike Harrison 
      > To: NSRCA Mailing List 
      > Sent: Wednesday, November 15, 2006 8:31 AM 
      > Subject: Re: [NSRCA-discussion] APC 18.1 x 10W props 
      > 
      > Peter, 
      > Hi, 
      > I am Mike Harrison, I worked with APC to develop these props.  Let 
      > me tell you the goal of the prop design.  It is to fly at a moderate
      > to slow constant speed under the noise limit but with good pulling 
      > performance.  Therefore, regarding the rpm, the 8000 is about ideal 
      > for that prop, turn it much more and you will be above the noise limit.   
      >   
      > I find it interesting that you determine whether a prop is adequate 
      > by first tacking it.  I would think you would fly it first to see if
      > it was adequate.  I would encourage you to do that first.  The OS 
      > 140 turns it about the same and it flies very well. 
      >   
      > The whole purpose was to develop a prop that would fly at a 
      > deliberate pace at about 150 meters to compete with the electrics.   
      >   
      > There is also an 18.5x9.5 which I fly and it turns about 7500 rpm.  
      > I like it better than the 18.1x10.  I am working on a 19x9 at the moment. 
      >   
      > Good luck 
      > Mike 
      > From: Peter Pennisi 
      > To: 'NSRCA Mailing List' 
      > Sent: Tuesday, November 14, 2006 5:48 PM 
      > Subject: [NSRCA-discussion] APC 18.1 x 10W props 
      > 
      >   
      > I recently purchased some 18.1 x 10W APC props for my DZ160. 
      > Apparently there appears to be another version 18.1 x 10.1. 
      >   
      > Could someone please tell me the difference between both? 
      >   
      > I tried a quick ground run on this prop (stock) this morning but 
      > could barely get 8000 RPM from the engine. I will take advice from a
      > member on this list and lop 1/4inch of each blade. What RPM readings
      > are people getting who are using either of these props on a YS DZ160 engine? 
      >   
      >   
      > Regards, 
      >   
      > Peter 
      > 
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