[NSRCA-discussion] APC 18.1 x 10W props

[Lance Van Nostrand]

You don't want that, Ryan.  There's a 18.75 x 9.35 that's way better.
--Lance

  ----- Original Message ----- 
  From: Ryan Smith 
  To: 'NSRCA Mailing List' 
  Sent: Wednesday, November 15, 2006 8:51 PM
  Subject: Re: [NSRCA-discussion] APC 18.1 x 10W props


  Mike,

   

  Is the 18.5x9.5 available yet?

   

  -Ryan

   


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  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 5:26 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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