Dolmette racingmotorbike with 24 Dolmar chainshaw engines

[Ontheroadagain]

Engineering "Made in Germany" compared with a Norther-German Comic Star
created her:

http://www.dolmette.com/html/bilder/dolmette_schleswig_engl_520kbit.wmv

http://www.dolmette.com/html/bilder/dolmette_contidrom_512kbit.wmv

http://www.dolmette.com/html/bilder/dolmette_engl_512kbit.wmv

[Ontheroadagain]

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

[AllGoNoShow]

OK now I forget the convertions. 125kW = How much Hp?

How much does this thing weigh?

[Caretaker]

he said 170 PS which is about 170 HP

[Ontheroadagain]

Originally posted by AllGoNoShow
OK now I forget the convertions. 125kW = How much Hp?

How much does this thing weigh?



The Dolmette uses 24 Dolmar chain saw engines. Power is transmitted by a series of belts to a Harley Davidson 5-speed transmission. The end result is a 24-cylinder, 2-stroke power source with a total displacement of 1900cc with about 170 hp ,speed 260 kmph lenght ca 3.90 m weight about 300kg

[DannyO]

haha WTF, thats pretty sweet, but it won't be winning any awards for beauty, also doesn't look fun to start the bike up.