[Rian-the-Risen]

Hi, im currently working on a weird hybrid between a crsosbow a slingshot and a tennisball throwing machine with a lot of idler pulleys and gears and suff.
Since im an engineer i want to calculate everything and the last piece that is missing are the tubes.
Does anybody have some values for the constant factor of stiffness (Federkonstante) especially for the different tubes available in the shop?

Can someone help me with this or advise me in a way?

Thanks

 

[Knallfrosch]

With tubes you mean Thera tubes? Or other tubes?
Maybe contact the Manufacturer directly for such technical details?

 

[JoergS]

Hook's law does not apply to rubber, unfortunately.

 

[Rian-the-Risen]

Im talking of the Dankung tubes available in tha slingshotshop,
thought somebody knew more

I know hook's law doesnt really apply here but since im looking forward to use rather strong tubes and use a pulley kind of system, i will have a lot of rubber which i can draw out without expanding the length of the rubber more than 150% id say.
Doesnt Hook's law apply approximately here?


Source: https://kwesiacquah.wordpress.com/ 14:55, 26.06.2016

 

[Greent]

hook's law does not apply to rubber, unfortunately.