Some redrives have thier own oil supply, pump and cooler. Advantage is you can use lubricant specificially designed for gears and not combustion byproducts.
Marc
>
> From: Dale Rogers <dale.r@cox.net>
> Date: 2005/06/16 Thu PM 01:59:37 EDT
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] re-drive question for Tracy
>
> Tracy,
>
>    Ian brough up a point that could also apply to the
> re-drive.  Since the planet ass'y was originally designed
> for lubrication with ATF, is there any particular reason
> why it couldn't be run as a closed system with a "scavage"
> pump circulating ATF, instead of using engine oil?
>
>    Dunno if there's any advantage to the ATF, for that matter,
> but I thought I'd ask.
>
> Dale
> (to whom the thought just occurred that this may have already
> been discussed - some years ago - and could be in the
> archives.)
>
>
> > From: "Ian Dewhirst" <ianddsl@magma.ca>
> > Date: 2005/06/16 Thu AM 10:52:04 EDT
> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> > Subject: [FlyRotary] Re: turbo oil drain
> >
> > Hi Rusty, there is no rule that states that you have to use engine
> > oil, since you already have a pump to scavenge and you really don't need
> > much oil pressure for a turbo, add a small sump and a little cooler perhaps,
> > and your worries of an engine oil leak are over.  The added advantage is
> > that you can lubricate before start and cool after shutdown.  
>
>
>
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