need source for long, weak compression springs

[mrnoble]

We are using the springs inside telescoping tubes. We are also considering gas springs, but would need two or more in a stack to compress down to our required height (29") and extend as far as we need them to go (70"). The springs can be weak, as they only will be lifting about 2 pounds of telescopic tubing and a hook. Thanks for your ideas and input!

[Swampdude]

I've used tall sprinkler head popup springs before that sound like they might work for you stacked.

[PAR_WIG1350]

Originally Posted by mrnoble

We are using the springs inside telescoping tubes. We are also considering gas springs, but would need two or more in a stack to compress down to our required height (29") and extend as far as we need them to go (70"). The springs can be weak, as they only will be lifting about 2 pounds of telescopic tubing and a hook. Thanks for your ideas and input!

Really? 70" seems like a lot. If you really need this much extension, I can get you information on how to do it; but I am curious to know what this is for, if you don't mind telling.

[mrnoble]

It's really just about 55" inches from the base of the bot (where the springs will start) to the end of the telescoping arm(s), where a hook will be located. The 70" allows for full extension without losing any force at the end. Happy to share our ideas. We are building two bots right now, one is a "normal" driver/shooter, the other a dedicated climber. Two extending hook "arms", two stationary hook "feet". In theory it works for any height. In practice, we having difficulty finding a few of the parts we want.