wuzak wrote: ↑
Mon Jun 06, 2022 9:47 am
J.A.W. wrote: ↑
Thu Apr 28, 2022 8:19 am
djos wrote: ↑
Thu Apr 28, 2022 12:47 am
The biggest issue with 2-stroke engines IMO, is the stupidly narrow powerband - they would make F1 cars undrivable. I reckon the 80's turbo cars would be more drivable than an NA 2-stroke F1 car!
In point of fact, you'll have to revise that opinion, & actually, its about 180 degrees off course...
A few cases in point: Cosworth sliced a pair of cylinders from its very successful DFV F1 V8
back in the mid `70s - in an attempt to provide Norton with a 4-stroke capable of winning
bike G.P.'s ahead of the newly rampant 2-strokes, but it was a fail, being 'unrideable' tuned-up.
Honda tried again in `79-80, with a radical 'virtual V8' NR500 4-stroke, yet it was 'unrideable''.
Once the FIM allowed 990cc 4-strokes to compete in the 'Senior/500cc' class, Aprilia tried a 3cyl
slice off Cosworth's V10 F1, 'The Cube' - but this too, was... yeah, you guessed it.. 'unrideable'...
Not only did these massive Moto GP machines have to be 'de-rated' specific output-wise,
they also required all manner of electro-mechanical assists, from a back-torque limiting
'slipper' clutch, to traction-control for power-limiting in corners...
See the Honda dyno graph linked below - showing their 2-stroke G.P. bikes from over a 1/4
century ago, current Moto GP bikes are still nowhere near the (non-assisted, as Mick Doohan
pointed out, other than by the rider's proprioception & reaction time skills) power-density of
those Championship-winning 2-stroke G.P. bikes...
https://www.kiwibiker.co.nz/forums/atta ... 1546116747
One might suspect that a 990cc 4 stroke GP bike with 280hp would be more difficult to ride than a 200hp 2-stroke.
Funnily enough, the last rider to win F.I.M. 500cc & MotoGP World Championships both, (V. Rossi) has
only recently retired, & he reckoned the much lighter, more highly tuned 500cc bike - which only
had the rider to regulate the power, (no complex suite of electronic power-control assistance) - it
surely took a greater level of skill to master... yet were much more rewarding to ride as a result..
Mick Doohan likewise complained, that when leaded fuel was banned (cutting peak power markedly)
& the minimum weight of 500cc bikes was raised to 130kg (both done to 'tame' the machines), it def'
made it "too easy" for riders of lesser skill to ride fast, & "spoiled" the "edge" that 500cc bikes had had.
A paraphrase of E. Bugatti's back-handed compliment to W.O. Bentley's successful sports-racing cars,
'...they are the worlds fastest lorries (trucks)...' was applied to MotoGP machines at their advent,
(& it may well be applicable to current F1 cars too - with their excessive size/weight/power?)