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Date: Mon, 7 Aug 2006 08:35:55 -0600
From: Bob White <rlwhite@comcast.net>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: PROPELLERS AND COOLING THE ROTARY
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Hi Yvon,

That web page uses a Java application to do the calculations.  You may
just have to enable Java and/or Java Script in your preferences.  I also
use Firefox on Linux.

Bob W.

On Mon, 7 Aug 2006 10:25:10 -0400
atlasyts@bellsouth.net wrote:

> I'm using Mac with Firefox browser. get it for free at: http:// 
> www.mozilla.com
> Buly
> On Aug 7, 2006, at 10:12 AM, Yvon Cournoyer wrote:
> 
> > Thanks Buly, I will study this reference some more, but the  
> > Hoverhawk calculator does not work on my Windows XP PC. Which  
> > browser are you using?. Yvon.
> >
> > ----- Original Message ----- From: "Bulent Aliev"  
> > <atlasyts@bellsouth.net>
> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> > Sent: Monday, August 07, 2006 6:36 AM
> > Subject: [FlyRotary] Re: PROPELLERS AND COOLING THE ROTARY
> >
> >
> >> Hi Yvon,
> >> Looks like you are over propped. here is a quote from a prop speed  
> >> web page:http://www.hoverhawk.com/propspd.html
> >> " To produce maximum thrust from your propeller at full power     
> >> your tip speed should fall between .88 and .92 mach. To move  
> >> between .88 and .92 mach usually takes a change of about 110 to  
> >> 120 RPM depending upon the diameter of your prop. This of course  
> >> varies depending on your particular propeller and the  
> >> temperature.  Try different temperatures then you will see just  
> >> how much the speed of sound can vary. You would ultimately want  
> >> your propeller to reach its redline (. 88 to .92 mach) at the same  
> >> time your engine reaches its maximum rpm limit, its redline.  "
> >> You should be turning the engine 6500-7000 rpm on takeoff (not  
> >> static) for best thrust.
> >>
> >>
> >> Bulent "Buly" Aliev
> >> FXE Ft lauderdale, FL
> >> http://tinyurl.com/s5xw8
> >>
> >>
> >>
> >>
> >>
> >>
> >> On Aug 6, 2006, at 4:56 PM, Yvon Cournoyer wrote:
> >>
> >>> I have replaced my old wood 2 blades 74'' propeller with a new 3  
> >>> blades 72'' Warp Drive, ground adjustable.
> >>> I have set the pitch to obtain about 4800 engine static rpm,  
> >>> which is what I began flying with my old wood prop, some years ago.
> >>> No other changes, yet in spite of abnormally hot and humid  
> >>> weather, I find that both oil and coolant cool better and will  
> >>> allow longer full power static runups.
> >>> I have not flown the new prop yet, but I am eager to verify its  
> >>> performance at altitude.
> >>> Yvon.
> >>>
> >>>
> >>> --
> >>> Homepage:  http://www.flyrotary.com/
> >>> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
> >>
> >>
> >> --
> >> Homepage:  http://www.flyrotary.com/
> >> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
> >
> >
> >
> > --
> > Homepage:  http://www.flyrotary.com/
> > Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/
> 
> Buly
> http://tinyurl.com/dcy36
> 
> 
> 
> 
> 
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net/lists/flyrotary/


-- 
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