Subject: Dodge vs Ford
From: Rotary Engine
Date: 1/10/2006, 5:20 AM
To: AA-me



   Here are some more threads of info for you.
  The tooth count for the dodge is 62 on ring 28 on the sun and 17 on
the planets.
  Comparing the C-6 gears that are used in the 2.17 and 3.17 ratio to
the Dodge 3.21 ratio the Dodge gears have much bigger teeth, the sun
gears are the same outside diameter but the C-6 has teeth and the Dodge
has 28 teeth, this is due to the larger teeth on the Dodge.
  Also the ring gears have the same inside diameter but the C-6 has 74
teeth and the dodge has 62 teeth due to the larger teeth on the Dodge.
  The surface speed remains about the same but the teeth are bigger,
sounds stronger to me.
  I have built off road race car transmissions for years and although
manual not stick and always the gears with bigger teeth were always
stronger.
  Another thing that I noticed when I was looking at gears at the tranny
shop is that the C-6 set that gives 2.85 ratio has a bigger sun gear and
the planet gears were real small do to the larger sun gear so that would
raise the planet gear rpm.
  Here is a shot of both gears side by side, its clear to see the
difference.
  Ken Welter

-------------------------------------------------

Why do these gears have plain bearings? The Ford has needle bearings.

BTW as far as I can tell there is no thrust on the planets.
The thrust is canceled out by the sun gear thrust being one direction and the ring gear thrust being the other direction. I could be wrong.


Paul Lamar ...No rotor no motor.

   Yes your right there is no load on the bronze bushing in the
center of the sun gear, the Ford is on the left and it is also a
bushing, of  course these are pressed out in our case as the sun is
locked to the pilot shaft.
  Ken


I don't think you got my drift. I was referring to the need for thrust
bearings on the planet shafts. You don't need them as there is no
net thrust on the planet gears. Only the sun gear and the ring
gear but the ring gear is fixed to the housing.


--
Paul Lamar ...No rotor no motor.

 Yes we were on the wrong page there, yes the thrust is defiantly
canceled out in the planets.
 Ken



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