Started to read a book called Motorcycle Dynamics, which dives into the physics of handling bike in quite a details. That brings me back to the Geometry -post where I mentioned the steering axle and fork main offset. Offset can be used to adjust the trail, but it has some other implications as well.
One thing offset does is that it reduces the up and down motion of the front when turning the handlebar. Since the steering is not in upright position the center of the front wheel lowers. The plot is an example of calculations with 32 degree caster angle (angle of steering axel from vertical line) and 32 cm wheel radius.
Calculations assume still some silly stuff like dimensionless wheels and hence no roll at all. Plus I'm severely hangoverish from yesterdays party at the garage so I'm not promising anything of this is 100% correct
So what? Good question, I've no clue about what all that means. But at least pumping front up and down is not nice for handling since it makes it heavy. If there is 150kg of weight on front wheel you will be pulling that up and lowering down in every turn.
No comments:
Post a Comment