- #1

R_Rose

- 16

- 0

What I need to know most is how to calculate the energy that can be obtained from a spring and which aspect gives the greatest increase of energy - such as pull weight vs expansion distance. Also, is there a difference in using a compression spring vs tension - can they both give the same results? I was looking at using a number of heavy duty coil truck springs and a block and tackle which can allow for greater distance of movement of the attached rope to compensate for the great compression strength vs short movement of the spring, so the 8" travel of expansion of the spring will translate to 16" or 24" depending upon what pulley system I use. I need to to know how I can calculate expected energy from the different springs that I use.

Another idea that I've had is to use tension springs and pulleys as needed to make for appropriate travel distances of bolt carraige or throwing arm.

Finally we come to bungees which I've come to respect greatly as they can store an awful lot of energy and for their size and weight can be very useful. I have no idea how to calculate energy available in these cords.

If anyone can help me out, I'd greatly appreciate it! Thanks