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

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

1. ## pls, how to calculate the length of a spiral arch ?

hello please, let's consider this spiral :
* 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   Reply With Quote

2. ## Re: pls, how to calculate the length of a spiral arch ?  Reply With Quote

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

thank you jim   Reply With Quote

4. ## 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.   Reply With Quote

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.  Reply With Quote

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