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Roll-ins

cmc

Turbo Monkey
Nov 17, 2006
2,061
6
austin
i wish i could say i remember how to do this stuff:

ap = agsin(theta) This formula calculates the acceleration of the object as it slides down the incline. In situations without friction it would be the actual acceleration of the object. In situations considering friction, the acceleration of the object would be less than this value.

http://id.mind.net/~zona/mstm/physics/mechanics/forces/inclinedPlane/explanation/inclinedPlaneExplanation.html


http://www.sparknotes.com/testprep/books/sat2/physics/chapter8section3.rhtml


rollercoaster simulator:
http://www.funderstanding.com/coaster
 
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cmc

Turbo Monkey
Nov 17, 2006
2,061
6
austin
That would be fun to learn stalls and airs on too.... and no way to get hung up.
exactly.

something about 70's skateparks with the lack of coping and lack of edge (rolled-over lips) seems to work for bikes better, except for grinds of course. .

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cmc

Turbo Monkey
Nov 17, 2006
2,061
6
austin

cmc

Turbo Monkey
Nov 17, 2006
2,061
6
austin
Hmm I'm really jonesing to build something in my yard. A 6-8 foot roll in would really help.


If you're rolling in to immediately hit a normal sized jump (4' tall X 10'-12' long) you may want to try something taller than 6 or 8. Go for 10 or 12 !

I'm saying this because my friends just build an 8' tall roll in and it didn't quite work the way they planned. They had to extend the platform for some run-up and put in a roller before the jump.

Also, Ramp Ranch bikepark (R.I.P.) had a roll-in for a box jump (you can see it on the right, in the back) that I think was 10' or 12' tall. That worked really well.

 
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