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Date: Tue, 29 Mar 2005 17:23:08 -0700
From: Bob White <bob@bob-white.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Re: [FlyRotary]RX8 P-Port
Message-Id: <20050329172308.08636924.bob@bob-white.com>
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Hi Ken,

There's a 'w' missing in www.  add that in and you will get it.  Here it is
fixed:   http://www.rx7club.com/showthread.php?t=326924 

Bob W.


On Wed, 30 Mar 2005 00:11:59 +0000
kenpowell@comcast.net wrote:

> George, I don't get a 'hit' with this address.
> 
> Ken Powell 
> Bryant, Arkansas 
> 501-847-4721
> 
> -------------- Original message -------------- 
> 
> Ken,
> Have a look at the discussion in
> http://ww.rx7club.com/showthread.php?t=326924 
> I found this when searching for balancing.
> I believe that the lack of extra Hp by one person could be some binding ( or drag) of the slightly bigger ( width ) rotor.
> The second chap claims an extra 10 to 15% 
> George (down under)
> ----- Original Message ----- 
> From: kenpowell@comcast.net 
> To: Rotary motors in aircraft 
> Sent: Sunday, March 27, 2005 12:54 PM
> Subject: [FlyRotary] Re: [FlyRotary]RX8 P-Port
> 
> 
> Hi George,
> I don't think we need to worry about apex seals in a non-turbo motor.  Tracy's or Hurley's 2mm seals will never break in a NA motor since there is no problem with detonation.  I just took some measurements of a '88 13b rotor:  width measurements around the outside of the rotor showed 3.136 - 3.139 inches.  Inside measurements from the gear face to the opposite side of the rotor (measured inside the bearing shell) was 3.144 to 3.145 inches.  I do not have micrometers large enough to measure from an apex seal groove to the opposite curved face of the rotor.  I don't have CAD capability so I can't send a drawing; can someone draw this up for us???  We need to compare these measurements to a RX8 rotor to see if the RX8 rotor will fit in the 'hole' of the earlier 13b's.
> 
> Ken Powell 
> Bryant, Arkansas 
> 501-847-4721
> 
> -------------- Original message -------------- 
> 
> Ken, 
> That's very true, and what I plan on doing for the single, do you think it's worth going to 3mm for a non - turbo single rotor?
> 
> The RX8 rotors are dirt cheap ( compared to new RX8 rotors) What dimensions do you want measured - I will do it for you!
> George ( down under)
> 
> I don't see the need for a 'bridged' intake port on the RX8 engine.  The RX8 also uses a 2mm apex seal; I think we can grind the RX8 rotor apex seal groove to the same depth as the older rotors then use Tracy's or Hurley's 2mm spex seals in a peripheral ported Renesis.  You should be also be able to use the lighter 8.7 lb RX8 rotors in the  older engines if you get the rotating assembly balanced.  Wish I had a RX8 rotor so I could measure the critical dimensions (but not bad enough to buy one!(grin)).
> 
> Ken Powell 
> Bryant, Arkansas 
> 501-847-4721


-- 
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