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The Drysdale 990cc V8 Grand Prix Racebike will be a ground up new design
- it will share no components with the Drysdale 750-V8 Superbike and will
have more in common with a Formula One Grand Prix car than most road going
motorcycles. In fact - Formula One Grand Prix cars will be boring in comparison
- the rules for the 2002 four-stroke Motorcycle Grand Prix class are far
less restrictive than those that F1 engine designers are constrained by.
STUNNING DESIGN:
Not
to be content with pushing acknowledged boundaries with the powerplant,
the 22000rpm.com GP bike will set new standards for style too, with noted
designer Glynn Kerr joining the team. From the tip of the '8-pack' inlet
stubs to the graceful lines of the tail section this bike oozes style,
the old addage of 'an iron fist in a velvet glove' is an over-used expression
but our GP bike will justify the tag absolutely.
CONCEPT
The basic rules of physics that dictate motorcycle speed have not changed
since the time when the decision was made to build the famous Moto Guzzi
500-V8, in a balance of maximum engine power vs. minimum frontal area
a V8 engine configuration can still not be beaten. For those a little
concerned by the title of the website, these sort of rpm are nothing to
be afraid of. The original Moto Guzzi V8 was doing over 13,000rpm in 1957
and the Honda 125-5 was tested at up to 24,000rpm using points and carbs
in the mid 60's!
As promised, the new rules should present the opportunity to make bikes
even faster than the two-stroke 500's we see racing today.
COMPARISON WITH NSR
500 HONDA
The V4 2 stroke NSR 500 is the most successful Grand Prix racing motorcycle
of the modern era - it is the model that has won the last six World Motorcycle
Championships in a row. Here is a comparison between the realistic specifications
of the Drysdale 990cc V8 and the NSR 500:
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Drysdale 990-V8 |
NSR 500 |
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990cc V8 - 4 stroke |
500cc V4 - 2 stroke |
| Cylinders |
8 |
4 |
| Redline |
20,600rpm |
14,000rpm |
| Power |
165kW (220hp) |
140kW (185hp) |
| Mass (no fuel) |
155kg |
135kg |
| Race Weight |
175kg |
162kg |
| Power to Weight Ratio |
0.942 |
0.864 |
| Fuel |
24 litres |
32 litres |
| Engine width |
330mm |
~300mm |
| Engine mass |
52kg |
45kg |
| Top Speed |
360kph |
340kph |
ADVANTAGES
1. Better power to weight - With a full fuel load at the beginning of
the race the Drysdale 990-V8 will be only 13 kg heavier than the benchmark
NSR 500 Honda. With a superior power to weight ratio and little more in
frontal area - the 990-V8 will be faster in a straight line and should
give away very little in the corners.
2. Better turn-in- The single heaviest component in any modern race motor
is the crankshaft - the 990ccV8 crankshaft will weigh only 4.3 kg - significantly
less than the complex pressed-up roller-bearing item used in the Honda
NSR 500. This represents a major reduction in the rotating mass which
reduces gyroscopic forces and allows the whole motorcycle to be much easier
to tip into a corner or turn generally.
3. More Power- The engine revs and power stated above are quite conservative
- with ongoing development it is not unreasonable to expect 22,000 rpm
and 180kW (240 hp) from a short stroke 990cc V8.
We have it all worked out in our heads- now we need your help to turn
it into reality!
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