Return-Path: Received: from mail16.syd.optusnet.com.au ([211.29.132.197] verified) by logan.com (CommuniGate Pro SMTP 4.3c3) with ESMTP-TLS id 829462 for flyrotary@lancaironline.net; Tue, 29 Mar 2005 23:27:05 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.197; envelope-from=lendich@optusnet.com.au Received: from george (d211-31-199-98.dsl.nsw.optusnet.com.au [211.31.199.98]) by mail16.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id j2U4QEdj005744 for ; Wed, 30 Mar 2005 14:26:15 +1000 Message-ID: <001901c534e1$1383d520$62c71fd3@george> From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: [FlyRotary]RX8 P-Port Date: Wed, 30 Mar 2005 14:29:34 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0016_01C53534.E4B0F120" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1106 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1106 This is a multi-part message in MIME format. ------=_NextPart_000_0016_01C53534.E4B0F120 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Ken, Sorry mate, in a bit of a hurry - try another w at the start, I left = one out. George George, I don't get a 'hit' with this address. Ken Powell=20 Bryant, Arkansas=20 501-847-4721 -------------- Original message --------------=20 Ken, Have a look at the discussion in http://ww.rx7club.com/showthread.php?t=3D326924=20 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%=20 George (down under) ----- Original Message -----=20 From: kenpowell@comcast.net=20 To: Rotary motors in aircraft=20 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=20 Bryant, Arkansas=20 501-847-4721 -------------- Original message --------------=20 Ken,=20 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=20 Bryant, Arkansas=20 501-847-4721 ------=_NextPart_000_0016_01C53534.E4B0F120 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 
Ken,
Sorry mate, in a bit of a hurry - try = another w=20 at the start, I left one out.
George
George, I don't get a 'hit' with this address.

Ken Powell
Bryant, Arkansas
501-847-4721
 
--------------=20 Original message --------------
Ken,
Have a look at the discussion = in
http://ww.rx7clu= b.com/showthread.php?t=3D326924 
I found this when searching for=20 balancing.
I believe that the lack of extra Hp = by one=20 person could be some binding ( or drag) of the slightly bigger = ( width=20 ) rotor.
The second chap claims an extra 10 = to=20 15% 
George (down under)
----- Original Message ----- =
From:=20 kenpowell@comcast.net =
To: Rotary motors in = aircraft=20
Sent: Sunday, March 27, = 2005 12:54=20 PM
Subject: [FlyRotary] Re:=20 [FlyRotary]RX8 P-Port

Hi George,
I don't think we need to worry about apex seals in a = non-turbo=20 motor.  Tracy's or Hurley's 2mm seals will never break in a = NA motor=20 since there is no problem with detonation.  I just took some=20 measurements of a '88 13b rotor:  width measurements around = the=20 outside of the rotor showed 3.136 - 3.139 inches.  Inside=20 measurements from the gear face to the opposite side of the rotor=20 (measured inside the bearing shell) was 3.144 to 3.145 = inches.  I do=20 not have micrometers large enough to measure from an apex seal = groove to=20 the opposite curved face of the rotor.  I don't have CAD = capability=20 so I can't send a drawing; can someone draw this up for = us???  We=20 need to compare these measurements to a RX8 rotor to see if the = RX8 rotor=20 will fit in the 'hole' of the earlier 13b's.

Ken Powell
Bryant, Arkansas
501-847-4721
 
--------------=20 Original message --------------
Ken,
That's very true, and what I = plan on doing=20 for the single, do you think it's worth going to 3mm for a non - = turbo=20 single rotor?
 
The RX8 rotors are dirt cheap ( = compared to=20 new RX8 rotors) What dimensions do you want measured - I = will do it=20 for you!
George ( down = under)
I don't see the need for a 'bridged' intake port on the = RX8=20 engine.  The RX8 also uses a 2mm apex seal; I think we = can grind=20 the RX8 rotor apex seal groove to the same depth as the older = rotors=20 then use Tracy's or Hurley's 2mm spex seals in a peripheral = ported=20 Renesis.  You should be also be able to use = the lighter 8.7=20 lb RX8 rotors in the  older engines if you get the = rotating=20 assembly balanced.  Wish I had a RX8 rotor so I could = measure the=20 critical dimensions (but not bad enough to buy = one!(grin)).

Ken Powell
Bryant, Arkansas =
501-847-4721
=
 
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