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Posted: 9/8/2004 6:24:32 PM EST
[Last Edit: 9/8/2004 6:25:12 PM EST by KA3B]

Engines


Belt drive systrem


Final drive


The motorcycle


The motorcycle


The team


Rider



The engine



What makes the Dolmette unique in engineering terms is its 24-cylinder 2-stroke power plant. Nothing quite like it has been seen before. The combined power of 24 DOLMAR chainsaw engines is fed into to a 5-speed Harley-Davidson transmission by a series of twelve toothed belts.

The engine in question is the one used in the PS-7900 professional chainsaw, which currently boasts the best power-to-weight ratio of any professional petrol chainsaw in the world – just 1 kg per PS. In standard trim each of these high-performance air-cooled 79 cc units generates 4.6 kW of power (6.3 PS) at 9500 rpm. A specific output of 59 kW per litre is outstanding for a chainsaw, and the secret lies in DOLMAR’s High Performance Combustion (HPC) technology. This term refers to the special design of the six gas exchange ports in combination with the asymmetrical combustion chamber head and the crankcase configuration: the result is a highly efficient combustion cycle with low exhaust emissions.

For use in the Dolmette the engines were tuned and tweaked to deliver 5.2 kW of power (7.1 PS) at 10,000 rpm. Maximum torque delivery is 5.5 Nm at 7,750 rpm. When all 24 are combined, the result is a 24-cylinder power plant with a total displacement of 1.9 litres, a power output of 125 kW (170 PS) and 130 Nm of torque at the centrifugal clutches

1 kiloWatt = 1.34102209 horsepower

1 engines @ 5.2 kw X 24 = 124.8 kw X 1.341022 = 167.3595 hp!!

www.dolmette.com
Link Posted: 9/8/2004 6:25:58 PM EST
[Last Edit: 9/8/2004 6:28:19 PM EST by ar50troll]
Thats GOT to be loud and stinky...Shape kinda reminds me of the Dodge Tomahawk.
Link Posted: 9/8/2004 6:26:24 PM EST
Whoa!
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Link Posted: 9/8/2004 6:27:20 PM EST
Should be fixed.


Originally Posted By P806:
Whoa!
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X
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Link Posted: 9/8/2004 6:31:16 PM EST
24 cylinders to get 167 HP? What a waste of time. You could beat that with a four stroke twin!
Link Posted: 9/8/2004 6:34:33 PM EST
must be a bitch to decompress and choke all those engines...
Link Posted: 9/8/2004 6:36:41 PM EST

Originally Posted By captainpooby:
24 cylinders to get 167 HP? What a waste of time. You could beat that with a four stroke twin!



And not have to pull-start the thing 24 times. Still though, it's always neat to see what mechanics think up after a night on the bottle.
Link Posted: 9/9/2004 3:34:38 AM EST
Here's the opposite of a chainsaw-powered motorcycle - a V8-powered chainsaw (1.6 MB file)

V8 Chainsaw
Link Posted: 9/9/2004 3:52:14 AM EST


Why?
Link Posted: 9/9/2004 3:54:22 AM EST
.... only in America.
Link Posted: 9/9/2004 3:56:07 AM EST

Originally Posted By Waldo:

Why?



Why not?
Link Posted: 9/9/2004 3:56:12 AM EST
Obviously somebody had too much time and money to waste. It all "looks" good as in they put it together right but to me it looks like crap! I'd be excited if it were maybe a V-12 aircraft engine, now that would be something!
Link Posted: 9/9/2004 3:58:17 AM EST

Originally Posted By Brisk322:
Here's the opposite of a chainsaw-powered motorcycle - a V8-powered chainsaw (1.6 MB file)
V8 Chainsaw


Tim Allen has run amuck!!
Link Posted: 9/9/2004 3:59:44 AM EST
Well, I can honestly say that I've never been so bored that something along this line ever came to
mind......
Link Posted: 9/9/2004 4:03:43 AM EST

Originally Posted By Brisk322:
Here's the opposite of a chainsaw-powered motorcycle - a V8-powered chainsaw (1.6 MB file)

V8 Chainsaw




Link Posted: 9/9/2004 4:07:10 AM EST
Way stoopit.

But hey, its a free country.

Link Posted: 9/9/2004 4:13:14 AM EST
They also made a gocart.



3 engines, 20hp.
Link Posted: 9/9/2004 4:16:11 AM EST
Not really.
Link Posted: 9/9/2004 4:17:40 AM EST

Originally Posted By osprey21:
.... only in America.



Germany, actually.

BTW, what's the deal with the rider's shoes?
Link Posted: 9/9/2004 4:21:30 AM EST
They must of had the centrifugal clutch removed on each one that way you could just push start it and not wear your arm out. Pretty neat nice machine work for sure.
Link Posted: 9/10/2004 2:55:54 AM EST
Or you could have a 48 cylinder Kawasaki

www.classickawasakiclub.com
Link Posted: 9/10/2004 4:41:09 AM EST
Every two miles you would have to stop and put a pint of premix in each engine.
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