X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail04.syd.optusnet.com.au ([211.29.132.185] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTPS id 911711 for flyrotary@lancaironline.net; Tue, 03 Jan 2006 17:57:07 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.185; envelope-from=lendich@optusnet.com.au Received: from george (220.237.241.45.optusnet.com.au [220.237.241.45] (may be forged)) by mail04.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id k03MuEWw017138 for ; Wed, 4 Jan 2006 09:56:17 +1100 Message-ID: <00d201c610b8$e6cd02e0$2df1eddc@george> From: "george lendich" To: "Rotary motors in aircraft" Subject: PSRU Ratios Date: Wed, 4 Jan 2006 08:56:14 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00CF_01C6110C.B7786BC0" 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_00CF_01C6110C.B7786BC0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable A question for Tracy. What problems would you envisage using a 3.21 ratio instead of the 2.85. One of the Lads on the other site has found this 'U-beaut' Planetary out = of a Cummings Diesel ( overdrive). There are two 5 planet arrangements, one with angle cut ( opposite to = the Ford unit) whereby the thrust is between the sun gear and planet ( = internal thrust gear arrangement). The other is a straight cut 5 planet arrangement ( no thrust). The beauty of this planetary is that the sun gear has a spline at the = aft end with a matching female splined flange ( for bolting to the = damper plate). The ring gear is externally notched as in the Ford 2.17. The planet housing is similar in design and size to the Ford 2.85. Advice from people in the industry are that the Dodge units are superior = to the Ford units, however that would have to be confirmed.=20 Originally you were opposed to going from the 2.17 to 2.85 for a number = of reasons - can quite remember why? Was it because of higher RPM ( = engine workload)? overspeeding the water pump and alternator? Anything = else ? What problems do you envisage with a 3.21:1 ratio? George ( down under) ------=_NextPart_000_00CF_01C6110C.B7786BC0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
A question for Tracy.
What problems would you envisage using = a 3.21 ratio=20 instead of the 2.85.
 
One of the Lads on the other site has = found this=20 'U-beaut' Planetary out of a Cummings Diesel ( overdrive).
There are two 5 planet arrangements, = one with angle=20 cut ( opposite to the Ford unit) whereby the thrust is between the = sun gear=20 and planet ( internal thrust gear arrangement).
The other is a straight cut 5 = planet=20 arrangement ( no thrust).
 
The beauty of this planetary is that = the sun gear=20 has a spline at the aft end with a matching female splined flange ( for = bolting=20 to the damper plate).
 
The ring gear is externally notched as = in=20 the Ford  2.17.
The planet housing is similar in design = and size to=20 the Ford 2.85.
 
Advice from people in the industry are = that the=20 Dodge units are superior to the Ford units, however that would have = to be=20 confirmed. 
 
Originally you were opposed to going = from the 2.17=20 to 2.85 for a number of reasons - can quite remember why? Was it because = of=20 higher RPM ( engine workload)? overspeeding the water pump and = alternator?=20 Anything else ?
 
What problems do you envisage with a = 3.21:1=20 ratio?
George ( down = under)
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