Okay, my turn to nit pick...
Quote:
|
Originally Posted by Dezmo
yes and no....lighter wheels help because they take less force to change direction (to induce precession) but the important point is, they still create gyro forces....for this reason there is a lower limit on how light a wheel can be.
|
So what is that limit? Do you really think that a wheel/tire/brake combo that weighed, say, 2 lbs. would make it so you couldn't turn the bike? How about 1 lb.? 3 ounces?
Yeah, that was for PSK. He got everything right except that...
Quote:
|
See my previous post about not actually moving the wheel, but putting force thru it.
|
Okay, how much force are you talking about? Personally, I can get a motorcycle to flick over to full lean at 50mph by barely pushing on the inside bar. So how much "gyroscopic" force could I possibly be introducing into the system?
Quote:
|
so tell me, if it JUST gravity, how do you hold a lean angle or correct it? by making the bike lean the other way? your tire is waaay over there now, you cant get weight onto the other side of it....precession is the ONLY way you can do this.
|
You hold your lean angle by keeping the tire contact patches at the correct point in relation to the CoG. If you want a little more lean, you steer the front tire a little further away from the corner. If you want to stand it up a little, you steer the front tire toward the inside of the corner.
If you want to flick it from full right lean to full left lean quickly, you give it a nice firm push on the left handlebar. That causes the contact patch to move from the left side of the bike to the right side, and the rear tire contact patch naturally follows.
The center of gravity of the bike simply moves straight upward, and then back down as the bike changes direction.
This is why I used my downhill skier as an example earlier. To you, it's apples and oranges, but it's the same principle at work. Both things - a skier and a motorcycle - need to lean to turn. With both, the idea is to get the part that's connected to the ground to be on the outside of the turn. The skier moves his skis underneath him, and the motorcycle rider moves his tires underneath him. SAME THING.
Quote:
|
who said the other gyros on the bike help turning? they are what is keeping the bike upright in the 1st place. If anything, they resist the change of direction.
|
I dunno, somebody up there said something about engine internals having more of a gyroscopic effect on things than the wheels. I just wanted to get that aspect out of the way, because it's a moot point.
Quote:
|
Gee, I thought that it was "harley davidsons are the best motorcycles in the world"
|
Okay, 2nd biggest fallacy...