making some North shore stuff and need some help- Mtbr.com
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  1. #1
    rockin the mid-west
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    New question here. making some North shore stuff and need some help

    Im making a 4' drop and dont know how tall to make the transition.also how far away from the drop should I set it. thanks. plus I will post some pics when its rideable.
    Last edited by madtownfreerider; 10-21-2004 at 09:11 AM. Reason: oops
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  2. #2
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    i dunno man, 4 inches is a pretty big drop. Id say maybe the landing should be 6 incehs away
    Quote Originally Posted by Mouse
    what were is gnarcal

  3. #3
    rockin the mid-west
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    what

    no man its 4 feet not 4"
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  4. #4
    rockin the mid-west
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    New question here. ?

    would 2' do it for how tall it should be come on guys I need some help
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  5. #5
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    mmmm

    -drop == 4ft. ->1.21m
    -hypothetical velocity==15mph or 6.7m/s.
    -time?
    -x?
    -g==9.81m/s squared

    time= square root of 2y/g---sqrt(2*1.21)/9.8=.49s

    x= Vxot--6.7m/s*.49s=3.283m

  6. #6
    rockin the mid-west
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    New question here. ok but im not big on math

    Quote Originally Posted by Jettj45
    -drop == 4ft. ->1.21m
    -hypothetical velocity==15mph or 6.7m/s.
    -time?
    -x?
    -g==9.81m/s squared

    time= square root of 2y/g---sqrt(2*1.21)/9.8=.49s

    x= Vxot--6.7m/s*.49s=3.283m
    ?????????????????????????????????????????????????? ?????????????????????????????????????????????????? ??????????????????????
    more help
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  7. #7
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    -drop == 4ft. ==1.21m
    -hypothetical velocity==15mph or 6.7m/s.
    -time?
    -x?
    -g==9.81m/s squared

    time= square root of 2y/g---sqrt(2*1.21)/9.8=
    x= Vxot--6.7m/s*.49s=3.283m

    So if you are going 15mph you will land
    10.76 feet away from the 4 foot drop. The position of the transition
    will be determined by how long and at what angle you want the incline to be. I havent build much north shore stuff but i would say you want the transition to be like 1.5 to 2 times the length of your bike. 25-30 degree angle.

  8. #8
    rockin the mid-west
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    Wink thank you

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  9. #9
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    it depends mainly on how fast you are going to be going so you can just calc it again for what ever speed your normallly going on your trail

    If i decide not to be lazy ill make a program in java for making drops and jumps that you can dl off my site.

  10. #10
    rockin the mid-west
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    New question here. that would be sweet

    ya if you have the time that would help alot also whats your web page?
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  11. #11
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    writting now be done eventually
    Last edited by Jettj45; 10-21-2004 at 01:14 PM.

  12. #12
    eci
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    build the drop 6 feet off the ground, build the landing 2 feet off the ground. make the gap 3 feet from the bridge to the landing Kapiesh??

  13. #13
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    it's 4ft just drop it..... seriously trial and error.... rake the dirt clean in front of the drop and getting cruising at the speed you will be going on average and just drop it...4ft even to flat is pretty minimal... when you land it, do it again and check to see where your landing...at that point build up if you want a tranny or gap........

  14. #14
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    Quote Originally Posted by Felpur
    it's 4ft just drop it..... seriously trial and error.... rake the dirt clean in front of the drop and getting cruising at the speed you will be going on average and just drop it...4ft even to flat is pretty minimal... when you land it, do it again and check to see where your landing...at that point build up if you want a tranny or gap........


    yea that works if its a small drop but you cant do that for all.

  15. #15
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    Quote Originally Posted by Jettj45
    yea that works if its a small drop but you cant do that for all.
    your exactly right, but the poster asked about a 4 footer....

  16. #16
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    Quote Originally Posted by madtownfreerider
    no man its 4 feet not 4"
    I know, i was just bustin ure bubbel for writing 4" instead of 4' not the difference in apostrafes.
    Quote Originally Posted by Mouse
    what were is gnarcal

  17. #17
    eci
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    you loose a fair amount of momentum if you build 4' to flat, if you build it 4' to tranny you can keep you momentum up for the next drizzop.

  18. #18
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    yes, honestly when i build them i just guess i was just real bored so did math

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