p.s. can't attach rossdwg5.gif will send seperarly

Here is a drawing of the Ross gear box.

2. is the front oil seal.

4. are the roughly 45 MM inside diameter prop gyro load needle bearings.
These are part of the reason the Ross gear box is so light weight.
The other reason is the prop shaft is made from thick wall relatively large
diameter chrome molly seamless tubing. A good feature of the Ross.

5. is the race for the large diameter needle bearing that takes all the prop
thrust loads.

6. is the the large diameter needle bearing that takes the prop
thrust loads. This bearing to my knowledge has never given problems.
Part of the reason for this is it is running only about 2700 RPM
unlike the Mazda 13B thrust bearing running at 6000 or so RPM.

7. is the Ford C6 ring gear.

8. is the Ford C6 planet carrier.

9. is the modified Ford C6 sun gear.

10. is the oil seal that leaks if you allow too much
oil pressure in the box. IMHO the box needs a vent at the top
that is vented back to the oil sump on the 13B besides the
normal drain back tube. BTW this drain back tube should
be be about 1/2 inch inside diameter. Some people scrimp on this
drain back tube diameter and I think that is part of the reason
some people have problems.

Paul Lamar

I RECENTLY RECEIVED A ROSS REDRIVE, IT APPEARS TO BE A 2:85:1 REDUCTION
WITH THE PROP TURNING IN THE SAME DIRECTION AS THE INPUT SHAFT. ITEM 7 IS
FIXED TO THE INSIDE OF CASTING ITEM 3 IN THE ACCOMPANYING DRAWING. ITEM 8
DOES NOT HAVE THE FINGERS SHOWN IN THE DRAWING. THE LENGTH OF THE CASTING
#3 IS ABOUT 7 3/4 INCHES FROM THE NOSE OF THE CASTING TO THE FLANGE WHICH
MATES TO THE BELL HOUSING. THE DIAMETER OF THIS FLANGE IS 7 INCHES.
ITEM 8 HAS 4 GEARS. THIS SETUP WAS APPARENTLY BRIEFLY FLOWN WITH A BMW
MOTORCYCLE ENGINE , AND IS CURRENTLY IN PIECES. THERE IS A BELL HOUSING AND
A CLUTCH HUB ASSOCIATED WITH HAS NO PROVISION FOR A STARTER.

I HAVE TRIED TO REACH ROSS AT THE NUMBER IN TRACYS BOOK WHICH GAVE ME A
REFERRAL # WHICH WAS DISCONNECTED. I WOULD LIKE TO GET INFO OR MANUALS
RELATING TO THIS DRIVE SO THAT I CAN RE ASSEMBLE IT CORRECTLY. I DON'T KNOW
IF IT IS A LIGHT DUTY SETUP OR IF IT WOULD BE APPLICABLE TO THE MAZDA
ENGINE, THE PRICE WAS RIGHT (FREE ) SO NOTHING IS LOST. JUST BEING ABLE TO
HANDLE AND EXAMINE IT HAS BEEN AN EDUCATION IN ITSELF.
ANY HELP OR INFO WOULD BE GREATLY APPRECIATED.

SINCERELY,
LARS NELSON

 
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