24-12-13, 11:10 PM
(24-12-13, 03:37 PM)wezdavo link Wrote:...With the two of you rolling down hill, you would be right, but, as soon as you touch the throttle the bike is not 'rolling' any more. F=MA means the Force the engine can produce, divided by the Mass it is pushing gives its resulting Acceleration. Being half the weight means having twice the acceleration from the same power. Put another way, halve the weight and you can halve the power and still get the same acceleration. But the thing people forget is that acceleration goes both ways, faster as well as slower.
How do you work this one? That's like saying you on a 250 would match him on a 600...
Remember the bike isn't carrying the weight more rolling it, so because your 5 stone lighter or 50% doesn't mean you could lower the capacity or power 50% and be able to keep up..
But yes I agree the thou would suit him better due to his physical size..
I did a track day years ago in Mondello Park on a ZX-9R. Between one thing an another, on most laps I would fly past an RS-250 on the main straight. It was being ridden by a whippet, and I would be 30 to 50 miles an hour faster then him when I passed, but I had to start hauling on the anchors by the footbridge, and every lap, time after time, he would fly around the corner inside me, and for the rest of the lap I was playing catchup again. In racing trim, he had over 70Hp pushing the bikes 130Kg, and the his 50Kg, against my road trim bike with 140Hp pushing 280Kg plus. Yes I could out drag him, but his higher corner speed, and much later braking meant we had about the same lap times.