Tracy Crook wrote:

At long last the design of the 2.85 : 1 redrive (RD-1C) is

complete.

Prototype testing is scheduled to begin in June and if all

goes

well,

production units will be available in August.

These are 6 pinion drives provisionally rated at 300 HP

continuous.

The

target engine for these drives is the RX-8 Renesis but also

useful

for

those

turning long props or running higher rpm on current 13B or

20B

engines.

I currently have 2 confirmed orders for this drive.   To

encourage

more

2.85

:1 users to order now and help reduce production costs with

higher

volume, I

am accepting deposits for the August production run at a

$140

discount.

Regular price is $2840.00.  A $100 deposit will hold your

production

slot.

If you already have one ordered you will get the reduced

price.

If for any reason the tests on the drive are unsatisfactory,

all

deposits

will be refunded.

Tracy Crook
tcrook@rotaryaviation.com
www.rotaryaviation.com

Great news Tracy, check's in the mail.

You had talked about hydraulic prop control provisions in the

past.

Is

this still part of the design?

MGM

Mike McGee, RV-4 N996RV, O320-E2G, Hillsboro, OR
13B in gestation mode

I have added some changes to make CS possible in the future but it's

not

there yet.  A previous design of the CS ready RD-1 was scrapped when

I

found

out that conventional CS props operate on oil pressures up to 1200

PSI

!!!.

I had incorrectly assumed they were in the range of normal engine

oil

pressures.  Back to the drawing board.  It will happen someday but

not

this

week. (gross understatement).

Tracy Crook

The oil pressure boost pump is in the "Governor".

Paul Lamar

Oddly enough Lycoming just uses a bearing surface on the crank to
transfer that oil pressure to the crank hub. A slot in the front bearing
meets the hole in the case to transfer the oil pressure. No "seals" or
"o rings".
[Marc Wiese]

 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.