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Improving The Reliability Of Helical Drop Gears In High Torque Applications...


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#61 Spider

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Posted 31 December 2019 - 09:34 AM

I was planning to do the same between a Rover V8 and an automatic 1800 box.

 

That's actually old news !

ADO17 - https://en.wikipedia.../wiki/BMC_ADO17

 

" As a one-off engineering prototype, to test production viability, an Australian 1800 Mark II body with subtly extended front guards and modified front internal structure was fitted with an early Rover 3.5 litre V8 mounted in the "North-South" position in the engine bay and then through a complex mechanical system, drove a heavily modified version of an "East-West"-mounted Borg Warner 3-speed automatic gearbox and Austin FWD differential. This car became Australia’s first locally-made FWD V8 car. The car was built by BLMC (Australia) at its Victoria Park works at Zetland, New South Wales."

 

Not sure if it's mentioned in that article, while it was 100% developed in Australia, the Engine & Gearbox are now in the UK, not sure where though !



#62 DeadSquare

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Posted 31 December 2019 - 10:17 AM

 

I was planning to do the same between a Rover V8 and an automatic 1800 box.

 

That's actually old news !

ADO17 - https://en.wikipedia.../wiki/BMC_ADO17

 

" As a one-off engineering prototype, to test production viability, an Australian 1800 Mark II body with subtly extended front guards and modified front internal structure was fitted with an early Rover 3.5 litre V8 mounted in the "North-South" position in the engine bay and then through a complex mechanical system, drove a heavily modified version of an "East-West"-mounted Borg Warner 3-speed automatic gearbox and Austin FWD differential. This car became Australia’s first locally-made FWD V8 car. The car was built by BLMC (Australia) at its Victoria Park works at Zetland, New South Wales."

 

Not sure if it's mentioned in that article, while it was 100% developed in Australia, the Engine & Gearbox are now in the UK, not sure where though !

 

Hmm, interesting.

 

Wife's cousin imported 10 Oz 1800 Utility into S.A.   He had pre-sold them, but the S.A. back tracked on the import levy and he didn't even brake even on the deal.

 

I had the mad idea of dropping the V8/1800 into the back of a Cox GTM, but I think the Borg Warner box probably weighed more than the the V8.



#63 DeadSquare

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Posted 31 December 2019 - 12:38 PM

 

From here, I doubt mark would have put it up unless he know they were legit, would be interesting to know why they never went anywhere,

Also the early saabs (99s?) used a pair of chains if the more usual type to drive the engine to and underslung box



http://mk1-performan...k/exp_dept.html

The SAAB had a triplex chain.

 

 

Without carving metal away somewhere, a triplex won't fit in the Mini transfer case,



#64 mini13

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Posted 31 December 2019 - 01:15 PM

Apparently The triplex was used in the saabs upto 185hp (900 turbo) so I would think a duplex would be OK on yhe a series unless it's somthing daft.

Those silent chains I linked should be pretty strong, and possibly easier to make the gears for, my main thought is backlash issues.

#65 DeadSquare

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Posted 31 December 2019 - 04:42 PM

A military device required the instantaneous engagement of  "a clutch"  (for want of secrecy) in a confined space.

 

This was achieved by partially longitudinally slitting a hollow axle into 6 sections, and expanding the axle at the desired moment with an explosive charge.

 

Unfortunately the expansion sometimes proved insufficient, and it was proved that the slits needed to be deeper.

 

I was one of several workshops sent revised drawings to rush out new parts, but I managed to overcome the problem in-situ in the existing devices by mounting a slitting cutter on an arm and driving it with a skein of Meccano "drop gears",  within a chain drive.

 

I have often thought of using something very like it to de-siamese the ports of a Mini head.






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