Originally Posted by Jamt
Another attempt at explaining what is going on, without involving angular momentum or whatever that is not necessary.
Look at this terrain feature. The skier/biker/whatever is coming in from the left.
Is it possible to use this feature (in isolation) to speed up? YES No because there are no forces that can push you to the right. You cannot do any magic tricks with parametric oscillation or conserving angular momentum.
How can you all be so obstinately wrong about this?
I can increase speed on this feature by pumping. It is not a myth, it is plain and simple reality. I have done it, I can do it, so can you, it's simple. Not just maintain speed, but increase it; on the way up, on the way down and even sideways if you turn it on it's side, just by pumping my legs in the transition.
Put down your pencil, release your protractor, take off your bifocals, ditch the pocket protector, get out from behind your desk, close the hard bound seventh edition and get your COMs to the skate park.
This thread is making me feel like Superman, I can do what the boffins say is impossible.