be infinitely easier to see if made in a large diameter, and could be mass produced with little effort.
speaking of which.. has anyone ever built a PVC projectile with extendable fins?

I've been thinking about something like this for a long time! I haven't thought about it enough to start ...

Ok, Sooo... I made a prototype.

<table><tr><td><a href="https://picasaweb.google.com/lh/photo/AQhXKKBuFnHihrjbdDjz6tMTjNZETYmyPJy0liipFm0?feat=embedwebsite"><img src="https://lh4.googleusercontent.com/-ouORlXgGte0/T48z_QoDTVI/AAAAAAAAAAo/VSwP82MLwPA/s144/ring%2520airfoil.jpg" height="54" width ...

Those tools would have been helpful but there are other options for the short on cash and resources but long on patience Wink

I'll look into that, and I have a TON of experience with with patience :D

So, should I make the fin length as long as the body length, or like 1 1/2 times the body length ...

Thanks for the link! I didn't even know that they made those! I really want to test this theory, but I don't have a lathe, or a mill... I could probably figure something out though.

I'm going to be working on a larger scale than bullets, I have a few pneumatic launchers, the barrel of one is 1 ...

I saw this new blade-less fan from Dyson, it uses the Coanda Effect to multiply the air going into it to up to 15 times the volume going out of it.

The design uses an airfoil shape wrapped around into a circle, and then uses pressurized air coming from a small opening around the rim of the circle ...