X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail20.syd.optusnet.com.au ([211.29.132.201] verified) by logan.com (CommuniGate Pro SMTP 5.0.6) with ESMTPS id 914716 for flyrotary@lancaironline.net; Thu, 05 Jan 2006 19:34:01 -0500 Received-SPF: none receiver=logan.com; client-ip=211.29.132.201; envelope-from=lendich@optusnet.com.au Received: from george (d58-105-133-79.dsl.nsw.optusnet.com.au [58.105.133.79]) by mail20.syd.optusnet.com.au (8.12.11/8.12.11) with SMTP id k060X9Fm023788 for ; Fri, 6 Jan 2006 11:33:12 +1100 Message-ID: <003b01c61258$c661ad70$4f85693a@george> From: "george lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Dodge vs Ford Date: Fri, 6 Jan 2006 10:33:11 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0038_01C612AC.97737940" 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_0038_01C612AC.97737940 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Dodge vs FordKen, The ratio is ring gear tooth (numbers) divided by sun gear teeth( = numbers). If drive is taken out of the planet (turning RH) =3D A divided by B =3D = 2.21+ 1 =3D 3.21 If drive is taken out of the ring gear ( turning LH) =3D A divided by B = =3D 3.21 EG the E4D is 78 toothed Ring gear divided by the 42 toothed sun gear = =3D1.85:1+1 =3D 2.85:1 and the 2.17 is a LH turning planetary with ring gear held can't = remember the tooth count. It doesn't matter 'what drives what' in the Truck - just count the = teeth. George ( down under) Ok I was wrong on that one, on the trucks the sun gear is held solid to = the case, the power is put into the planet and the power is taken off = the ring gear, now what the hell ratio that works out to be I don't know = as I am confused. I would like to add that in the truck the planet is held solid to = the case, the power in is put into the sun gear and the power out is = taken from the ring gear so the ratio comes out to 2.21 rather than 3.21 = as I am using it. The Dodge overdrive is is a 3.21 and it comes from a 518 and 618 = transmission, is that the gear use you were asking about ?? Ken I am not familiar with the Dodge transmission but an overdrive = gear with a ratio of 3.17 : 1 is astounding! Every other OD gear I've = come across has a ratio something like .707 to 1. Are you sure about = that gear's use? I'm always up for learning a new wrinkle. Tracy ------=_NextPart_000_0038_01C612AC.97737940 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable [FlyRotary] Re: Dodge vs Ford
Ken,
The ratio is ring gear tooth = (numbers) divided=20 by sun gear teeth( numbers).
If  drive is taken out of the = planet (turning=20 RH) =3D A divided by B =3D 2.21+ 1 =3D 3.21
If drive is taken out of the ring gear = ( turning=20 LH) =3D A divided by B =3D 3.21
 
EG the E4D is 78 toothed Ring gear = divided by the=20 42 toothed sun gear =3D1.85:1+1 =3D 2.85:1
and the 2.17  is a LH turning = planetary=20 with ring gear held can't remember the tooth count.
It doesn't matter 'what drives what' in = the Truck -=20 just count the teeth.
George ( down under)
 
Ok I was wrong on that one, on the trucks the = sun gear=20 is held solid to the case, the power is put into the planet and the = power is=20 taken off the ring gear, now what the hell ratio that works out to be I = don't=20 know as I am confused.



   = I would=20 like to add that in the truck the planet is held solid to the case, = the=20 power in is put into the sun gear and the power out is taken from = the ring=20 gear so the ratio comes out to 2.21 rather than 3.21 as I am using=20 it.



   = The Dodge=20 overdrive is is a 3.21 and it comes from a 518 and 618 transmission, = is that=20 the gear use you were asking about ??
 
 =20 Ken




 
I am not familiar with the Dodge = transmission but an overdrive gear with a ratio of 3.17 : 1 is=20 astounding!  Every other OD gear I've come across has a ratio = something like .707 to 1.   Are you sure about that = gear's=20 use?  I'm always up for learning a new wrinkle.
 
Tracy

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