flyrotary@lancaironline.net Mailing List Archive

George - don't get me in trouble. I'm NOT saying Tracy is wrong, I was just wanting to learn why things are designed the way they are.

so, the high HP on the redrive requires better lubrication than simply grease, I.e. spray lubrication, and for simplification, the engine oil system (synthetic oil) is used rather than a separate system.

how is the C-6 lubed in trucks? I'm sure it's average HP requirements are less than the PSRU. where are the c-6 planetary gears actually located in a truck? trans, rear end, o/d unit...?

----- Original Message -----

From: George Lendich

To: Rotary motors in aircraft

Sent: Tuesday, December 05, 2006 10:40 PM

Subject: [FlyRotary] Re: redrive lube

Kevin,

I guess this will be one of a hundred responses, however -

1.Tracy's way of doing his PSRU is OK.

2. Motor oils is likely to get contaminated with 2-stroke oil if your using it (most are) and carbon particles from the combustion process which act as an abrasive.

3. Motor oils need to be changed after 12 months even in low use situations.

4. Heavy duty of the gears ( as in aviation use) may need pressure directional spraying, whereby most gearboxes have splash lubrication.

An ideal situation would be a separate cooling of PSRU oil with synthetic lube oil, with pressure fed directional spraying of the planetaries and their bearings from it's own pump and reserve/ cooler.

Just my opinion.

George ( down under)

----- Original Message -----

From: kevin lane

To: Rotary motors in aircraft

Sent: Wednesday, December 06, 2006 3:39 PM

Subject: [FlyRotary] redrive lube

i am asking this question with only the experience back in college years of putting a buick v-6 in a 1953 willys, no race car experience etc......

auto transmissions have special fluid and coolers because of the torque converters, right? manual transmissions just have gear lube, which, it seems, you put in and basically forget about. what is different about the PSRU redrive from a manual transmission? why can't it be self-contained with gear lube and forgotten? are planetary gears different from a manual transmission? are they fed with an oil flow and coolers in trucks? i'm sure all of this has already been answered and thought out. ken said he keeps his redrive lube separate from the dirty engine oil. why are tracy's redrives plumbed as part of the engine oil flow? kevin (just curious)