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Originally Posted by Dezmo
Scott, you have the right idea, as the wheel is pulled the other way as the bike leans, but its being pulled by.....gyroscopic precession (gasp)
I really dont see how difficult this is to understand, it should be clear to anybody with a basic grasp of HS physics.
Now, do I think gravity does nothing to a turning bike? of course not, it helps...theres no denying that, but the predominant force making the bike lean is gyroscopic. If you took away gravity (and somehow still held the bike down) or took away the gyro force (by having some magical device with 2 identical objects spinning in opposite directions in the same physical space) the bike would still turn using the other force involved.
Mille: I'm no engineer, I cant solve your problem (that and I really dont care). But if Aprilia (or rotax) came up with it, surely somebody else can figure out how it works. OK, so its extremely complicated math, but its not voodoo 
and counter-rotating brakes? maybe he is onto something, maybe he is full of shit, but either way its too heavy and complex for any gains it might have |
Sorry don't agree. Gyroscopic force HELPS a wheel stay vertical [CORRECTION, wants it to stay in it's original plane]. It is the mass of the wheel greating an outward force due to energy imparted into it by it being spun.
Basically it is the centrifugal force ... like when you spin a top, it wants to spin horizontally until the energy disipates. The top wants to go horizonal because its contact (pivot) point is in the middle and friction must be even in all directions (path of less resistence) around this pivot thus the axis becomes vertical
This force makes it harder to lean the wheel, it does not cause the wheel to lean.
BTW: You cannot pull the wheel out from the bottom on a bike, as the tyre is gripping the road. Instead the weight on the inside of the wheel over comes the gyroscopic affect and thus forces the wheel to lean ... hence the turn starts.
BTW: Weight on the inside of the bike is not just about gravity, it is the rider MOVING the centre of gravity of the bike and rider combination. Naturally if the rider stays in the middle the CoG is in the middle and the bike wants to stay upright.
Pete