Mailing List flyrotary@lancaironline.net Message #23911
From: Kelly Troyer <keltro@att.net>
Subject: Re: planetary gear ratios
Date: Wed, 15 Jun 2005 14:19:56 +0000
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Ernest,
   Afterthought........Ideal ratio for that 8500 rpm P port engine !!
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2




-------------- Original message from keltro@att.net (Kelly Troyer): --------------

Ernest,
  Sounds like you have youself a 3.17-1 redrive !! 
--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2

-------------- Original message from Ernest Christley <echristley@nc.rr.com>: --------------


> Tracy Crook wrote:
>
> > The formula is not the same for both locked ring gear and locked
> > planetary gear. This formula is for the locked ring gear and you
> > probably have the locked planetary. Remove the 1 from the equation
> > and it will come out right for yours.
> >
> > Tracy (making a lot of assumptions about your drive)
> >
> > I ran across some information in one of the scientific newsgroups
> > on how
> > to calculate the gear ratio of a planetary gear set.
> >
> > ratio = 1 + r / s
> >
> > where: r = number of ring gear teeth
> > s = number of sun gear teeth.
> >
>
> The ring gear is actually locked. The ring gear is pressed into the
> housing.
>
Subscribe (FEED) Subscribe (DIGEST) Subscribe (INDEX) Unsubscribe Mail to Listmaster