Hardly Ideal

You say "inflict", I say "delight"
 
This might sound primitive, but... have you considered just putting globs of hot glue on it?

I say "inflict" because I'm not sure how many friends are as insane as me.

And no way I'm trusting hot glue with this. Not only do I want something reversible, but it's let me down in way less kinetic applications.

I have some new hardware on there now. It's a bit of a Frankenstein still, but . I think I can actually use this!


No official numbers for the speed and it's pretty inconsistent, but I'm pretty sure this thing easily hits 100fps.

So, performance-wise, I love it. It feels like it could be commanding in open spaces and it's just plain fun.

 

But one of the problems I've had for the longest time is structure. I have the damnedest time getting the parts to stay in place in a way that's sturdy, but also reversible (I'd like to still be able to shoot arrows from this on occasion). I've thought about using hose clamps, but with all the different axes I need to join... maybe I can drill through the clamps and screw a pair of them together? With a layer of camping mat foam in between to cushion the parts?

What bothers me about Discord and other small groups like that are how they're difficult or impossible to search for. Reddit could turn up fairly well, but even a robust chat channel is just too ephemeral.

In case you don't follow every single Reddit post, we'll be trying a Target Tuesday remote competition tomorrow. Read more about it here: https://www.reddit.c...ve_this_a_shot/

Given that your group is concerned about injury with custom projectiles (and reasonably so), have you considered using craft foam for fins instead of cardboard?

 

Also apparently angling the fins a little bit creates spin, which is good for stability. Might be worth giving it a go.

 

Side note, have you seen MTB's video on making titan rockets? Might be a good source of inspiration, even if it doesn't fit the goal of interchangeable ammo.

 

They're all made completely from craft foam and pipe insulation, so the injury risk is pretty low. I don't think I ever considered cardboard; too thick, and it wouldn't make for as good of a seal on the barrel.

 

Some of the first ones have been made with tilted fins to induce a spin. But if KSP is anything to go by, excessive spinning hurts performance, so it's a little tricky making sure it doesn't go too far.

 

And yeah, I did stop by MTB's stuff on the way here. I considered hollowing out pool noodles with a Forstner bit on a drill press to get the inner diameter of the missiles to match the Titan's stock 40mm, but that seemed like an awful lot of work compared to wrapping foam.