How can I design a stable spring launcher for my ISU project?

[rainbows]

i need to design a spring launcher that can shoot a spring given various stretch lengths and angles
here is a somewhat close example

http://www.efreaks.org/pics/2004-03-09_Physics/pages/000_0031.htm"

i don't quite understand how to join the 2 wooden pieces together that would give me the flexiblity of changing the angle upon my leisure.( from 0-90 degrees)..the above example uses hinges but that doesn't seem stable enough..cause they might move with some force...it needs to be stable

 

[dotman]

Hello,

You could use something like a threaded rod, that you turn, and it rotates the platform. Like a C-clamp, except without the C.

Amateur astronomers sometimes use the same idea for cheap camera mounts to track the stars-- they call them barndoor trackers, and its the same idea-- although you would need a bigger range.

Just a thought. You could also use curved metal brackets that the platform locks into with wingnuts or some such contraption.

 

[ogb p]

I understand your need to design a spring launcher for your ISU project. The example you provided is a good starting point, but I can see your concern about the stability of the hinges used to adjust the angle. In order to ensure stability, I would recommend using a more rigid and secure joint, such as a ball and socket joint. This type of joint allows for a wide range of movement while still maintaining stability and precision in the angle adjustment.

Another option could be to use a sliding mechanism with a locking mechanism to hold the spring at different stretch lengths. This would eliminate the need for hinges altogether and provide a stable and easily adjustable launcher.

In any case, it would be important to test and adjust your design to ensure that it can withstand the force of the spring and maintain its stability during launch. This could involve using stronger materials or reinforcing certain parts of the design.

I would also suggest researching and studying other spring launcher designs for inspiration and ideas on how to improve your own design. With careful planning and experimentation, I am confident that you will be able to create a successful and stable spring launcher for your ISU project. Good luck!