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IndustryArena Forum > Mechanical Engineering > Mechanical Calculations/Engineering Design > pls, how to calculate the length of a spiral arch ?
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  1. #1
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    pls, how to calculate the length of a spiral arch ?

    hello please, let's consider this spiral :
    ... angle 0, radius 50
    ... angle 180, radius 75
    ... angle 360, radius 100
    * thus a spiral starting from diameter 100, going to diameter 200, with a single loop

    please, is there a mathematical formula to calculate the length of this spiral, between angles 70* and 123* ?

    kindly
    Ladyhawke - My Delirium, https://www.youtube.com/watch?v=X_bFO1SNRZg

  2. #2
    Community Moderator Jim Dawson's Avatar
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    Re: pls, how to calculate the length of a spiral arch ?

    Jim Dawson
    Sandy, Oregon, USA

  3. #3
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    Re: pls, how to calculate the length of a spiral arch ?

    thank you jim
    Ladyhawke - My Delirium, https://www.youtube.com/watch?v=X_bFO1SNRZg

  4. #4
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    Re: pls, how to calculate the length of a spiral arch ?

    I tried to calculate it with integrals but gave up. Should be easy enough for a student who still has fresh calculus in his head. :wave:

  5. #5

    Re: pls, how to calculate the length of a spiral arch ?

    There are plenty of free cad programs on the net, why not use one of them and draw what you want,then you can interrogate the drawing to get your answer.

    Good luck.

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