roost said:
What I was trying to say is that if the clutch springs (the usually three) are too strong, then the vario will go in extension to increase the ratio, this way the clutch will be spin up enough to engage. As a conseguence of this the clutch can't be made to engage at higher rpm (of engine) than at which the vario is set to work. The only thing to do is to mount softer clutch springs. Just try to mount an malossi delta clutch with black springs on a stock motor, then watch wit the cover open what happens.
Ok so what I said you was saying, you was indeed already saying, but with difficult words: Too strong clutch springs: variator starts working, before clutch has (fully) engaged
I think you are thinking the wrong way (no offense).
What Joel and I are trying to say, is that on two equal engines but different gearbox ratio, while their variators are in "working range", they will accelerate with equal acceleration. What happens if the engines are in different states (like if one has the range of the vario ended) is a matter of setups and many other factors.
Non taken. I just think you and Joël talk about some technical ideal situation, where 2 scooters have certain "measurments in the ideal setting" while maybe I'm talking about street performance, where one scooter (with lower gearing) will be faster to -for example- 50 km/h or first to cover 200 meters.
The bycicle thing is a different thing. The bycicler can't start without help becouse he needs some speed to stay in equilibrium (to not fall with the bike). And then there is the human factor; muscles cant create enough force to to accelerate fast enough to not fall from the bike. But with an minimum ammount of force and no drag forces you can accelerate to the nearly speed of light. Like the space probes with ionic motors; the motors produce only a few N of thrust, but they work non-stop for some years, and push the probes to great speeds.
Okay, but now forget about the rider and hypthetical say it's a robot and he won't fall off @ 0 km/h. And this robot has a given amount of power that he can transfer through the peddles continuously.
With a tall gearing, like in the Hour Records, this robot would accelerate less fast, than when he was on a bike with a very short gearing (say one used when driving up against a mountain) and of course he would have a much slower top speed, compared to the "Hour Record gearing", but to get to that top speed, it will take longer (the power of the robot is the same all the time at both bikes) since quite simply, the gearing is literally heavier to turn around.
The turning moment (=torque) of the shorter geared one is greater, than on the longer geared one.
Well, energy is what makes the bike accelerate. If you loose some energy in clutch warming, then that energy wasn't used for the bike acceleration.
That's true. Partly. While the clutch consumes energy (tranformed into heat) not ALL energy will be consumed, so there's still energy available to get the quick(er) acceleration.
If you would dump the clutch, there's no (or hardly) any friction between the clutch plates, so no energy loss their.
But this doesn't mean that all the energy is now available for acceleration. The friction in the taller ratio will now consume that energy, even more. So it will suffer in acceleration.
So in these cases with tall (firsts) gears, converting energy through the clutch will have more energy left for acceleration / getting it off the line, as when you would just dump the clutch. The heavy gearing would consume ALOT, it could even consume so much, it will just stall the engine.
