MINI2

nonsequitur · Dec 30th, 2003, 04:25 PM

Here's an interesting website on the development history of Continuously Variable Transmissions in racing, which has a direct relationship to the ZF ecoTronic VT1F CVT we have in the MINI.

Our car uses a 24mm wide "Van Doorne" steel push belt, and the principles developed by Hub and Wim van Doorne's company Van Doorne's Transmissie (VDT) and later Van Doorne's Automobiel Fabriek (DAF).

The new BMW Group MINI CVT is mentioned in Part 2:

The rise and fall of alternative power in motor racing
Swoosh and screech!
By Mattijs Diepraam (May 19, 2003)
-- Introduction: Sixties lateral thinking
http://8w.forix.com/altpower-intro.html
-- Part 1: Aircraft on asphalt
http://8w.forix.com/altpower-turbines.html
-- Part 2: The perfect gear
http://8w.forix.com/altpower-cvts.html

Some of the interesting illustrations and pictures:
- DAF 55 cutaway drawing showing the "rubber band" transmission
http://8w.forix.com/daf55-seethru.jpg

- Jack Brabham with his '64 Brabham-Repco F1 car
http://8w.forix.com/jb-67-daf.jpg

- DAF 55M Marathon Coupé rallied alongside Mini Coopers
http://8w.forix.com/daf55m.jpg

- Williams FW15C F1 car paired with a “Transmatic” CVT
http://8w.forix.com/cvtwilliams003.jpg
http://8w.forix.com/williamscvt.jpg
"David Coulthard set some spectacular times at Silverstone"
.

Vanwall · Dec 31st, 2003, 07:04 AM

I remember when Cars And Car Conversions was running a DAF that was prettty potent in its class in the early '70s. We're really just a buffed up Variomatic! ;-)

BCNU,
Rob in Dago

nonsequitur · Dec 31st, 2003, 03:36 PM

Or some other carefully chosen words ... like "similar concept".

The ZF gearbox we have uses one steel belt (versus two of rubber) that pushes torque (versus pulls) in a very much smaller device that weighs only 52lb (versus how much heavier?). Ours is probably closer to the F1 gearbox that David Coulthard drove in the Williams FW15C.

Separate subject related to this thread:
I proposed the car names "Daffodil" or "Marathon" over on another thread as ideas for a bold CVT owner to use for their car. The thread of history back to CVT-equipped DAF cars in the '60s might be fun for someone here.
http://www.mini2.com/forum/showpost....&postcount=120

Dec 30th, 2003, 04:25 PM	#1
nonsequitur MINI2 Master My Classifieds Join Date: Nov 2002 Location: Seattle area, WA Local Time: 09:03 PM Posts: 1,471 Offline	CVT history in racing Here's an interesting website on the development history of Continuously Variable Transmissions in racing, which has a direct relationship to the ZF ecoTronic VT1F CVT we have in the MINI. Our car uses a 24mm wide "Van Doorne" steel push belt, and the principles developed by Hub and Wim van Doorne's company Van Doorne's Transmissie (VDT) and later Van Doorne's Automobiel Fabriek (DAF). The new BMW Group MINI CVT is mentioned in Part 2: The rise and fall of alternative power in motor racing Swoosh and screech! By Mattijs Diepraam (May 19, 2003) -- Introduction: Sixties lateral thinking http://8w.forix.com/altpower-intro.html -- Part 1: Aircraft on asphalt http://8w.forix.com/altpower-turbines.html -- Part 2: The perfect gear http://8w.forix.com/altpower-cvts.html Some of the interesting illustrations and pictures: - DAF 55 cutaway drawing showing the "rubber band" transmission http://8w.forix.com/daf55-seethru.jpg - Jack Brabham with his '64 Brabham-Repco F1 car http://8w.forix.com/jb-67-daf.jpg - DAF 55M Marathon Coupé rallied alongside Mini Coopers http://8w.forix.com/daf55m.jpg - Williams FW15C F1 car paired with a “Transmatic” CVT http://8w.forix.com/cvtwilliams003.jpg http://8w.forix.com/williamscvt.jpg "David Coulthard set some spectacular times at Silverstone" . '02 MINI Cooper CVT(6/12/02; Indi Blue/Black, R-81 7-hole 15x5.5" or NZO 16x6.5") '67 Austin Cooper S (6/26/67; Tartan Red/Black, 10x4.5") Last edited by nonsequitur : Dec 30th, 2003 at 08:20 PM.

Dec 31st, 2003, 07:04 AM	#2 (permalink)
Vanwall Fershluginer Potrezibie Join Date: Jun 2002 Location: San Diego, CA Local Time: 10:03 PM Posts: 326 Offline	I remember when Cars And Car Conversions was running a DAF that was prettty potent in its class in the early '70s. We're really just a buffed up Variomatic! ;-) BCNU, Rob in Dago Brooksie, the 2002 BRG & W Cooper, lets me sit in the drivers seat sometimes.

Dec 31st, 2003, 03:36 PM	#3 (permalink)
nonsequitur MINI2 Master My Classifieds Join Date: Nov 2002 Location: Seattle area, WA Local Time: 09:03 PM Posts: 1,471 Offline	Or some other carefully chosen words ... like "similar concept". The ZF gearbox we have uses one steel belt (versus two of rubber) that pushes torque (versus pulls) in a very much smaller device that weighs only 52lb (versus how much heavier?). Ours is probably closer to the F1 gearbox that David Coulthard drove in the Williams FW15C. Separate subject related to this thread: I proposed the car names "Daffodil" or "Marathon" over on another thread as ideas for a bold CVT owner to use for their car. The thread of history back to CVT-equipped DAF cars in the '60s might be fun for someone here. http://www.mini2.com/forum/showpost....&postcount=120 '02 MINI Cooper CVT(6/12/02; Indi Blue/Black, R-81 7-hole 15x5.5" or NZO 16x6.5") '67 Austin Cooper S (6/26/67; Tartan Red/Black, 10x4.5") Last edited by nonsequitur : Dec 31st, 2003 at 04:32 PM.

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