Results 1 to 9 of 9
  1. #1
    mtbr member
    Reputation:
    Join Date
    Jan 2004
    Posts
    67

    Start or launch ramp and speed?

    How much speed will a launch ramp generate, if it is just - of cource it also depends on the riders ability to accelerate.

    a) 2 meter tall and 4 meter long?
    b) 3 meter tall and 6 meter long?

    The surface will be made out of wood!

    Any experience with something like this?

  2. #2
    Unpredictable
    Reputation: Ridnparadise's Avatar
    Join Date
    Dec 2007
    Posts
    1,527
    Calling CMC4130, but you may have to add more detail Esben - are the ramps flat to a drop, upsloping to a kicker (acceleration being negative), downsloping to a steep tanny, after a downslope, flat or other??

  3. #3
    I need skills
    Reputation:
    Join Date
    Jul 2004
    Posts
    987
    the launch ramp will not generate any speed.

  4. #4
    mtbr member
    Reputation:
    Join Date
    Jan 2004
    Posts
    67
    The surface is flat after the start, So it is just a very simple roll in.
    Attached Thumbnails Attached Thumbnails Start or launch ramp and speed?-start-.jpg  


  5. #5
    Unpredictable
    Reputation: Ridnparadise's Avatar
    Join Date
    Dec 2007
    Posts
    1,527
    Quote Originally Posted by cjohnson View Post
    the launch ramp will not generate any speed.
    I'm no physicist, but 9.8m/s2 minus friction adjusted for angle of descent (eg 3m in 6m) and tires, rider confidence (approach speed and brakes) and assorted other issues including the effect of opposing cosmic rays; this sounds pretty cool to me. Time to launch.

    And, by the way, I agree the launch ramp cannot generate any speed

  6. #6
    Happy, in the woods.
    Reputation:
    Join Date
    Nov 2008
    Posts
    244
    The curve/shape of the ramp will have a major impact on the speed of the rider exiting the ramp. I'll try to get some picture around to illustrate this better. Gimme a couple days.
    Abba Zaba, you my only friend....

  7. #7
    mtbr member
    Reputation: cmc4130's Avatar
    Join Date
    Jan 2008
    Posts
    1,300
    Quote Originally Posted by Ridnparadise View Post
    Calling CMC4130, but you may have to add more detail Esben - are the ramps flat to a drop, upsloping to a kicker (acceleration being negative), downsloping to a steep tanny, after a downslope, flat or other??
    heh heh cool !

    i have a thread over on ridemonkey about roll-ins: Roll-ins

    what are you using the roll-in for? are you going to hit a jump right after it?

  8. #8
    Unpredictable
    Reputation: Ridnparadise's Avatar
    Join Date
    Dec 2007
    Posts
    1,527
    Quote Originally Posted by cmc4130 View Post
    heh heh cool !

    i have a thread over on ridemonkey about roll-ins: Roll-ins

    what are you using the roll-in for? are you going to hit a jump right after it?
    I think those ridemonkey ramps are pretty much what all of us ride daily

  9. #9
    mtbr member
    Reputation: cmc4130's Avatar
    Join Date
    Jan 2008
    Posts
    1,300
    Quote Originally Posted by Ridnparadise View Post
    I think those ridemonkey ramps are pretty much what all of us ride daily
    The pics of the smaller ones at skateparks I posted are ones that guys ride almost daily and the backyard ones as well !!

    Original poster should decide whether he wants to crank a couple times across a platform THEN down the slant.... Or whether he wants to roll in from a standstill. If you do that the roll in MUST be taller--a 3 or 4 foot tall roll-in will not do much.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •