I now have this interesting configuration. Which I decided to name the Wob+ (The Backwards +Bow).
The operation is similar to Carrtoon's creation, but I'm avoiding using too many plumbing parts. I did have to switch to a different spring from the one used in the +Bow because it had to be a larger outer diameter and it had to have a lower compression load rating.
The plunger rod is SCH40 PVC pipe with a 12-inch thinwall PETG barrel nested inside of it.
Blaster length: 16" (when not primed)
Plunger Chamber ID: 1-3/8"
Spring load: 10 lbs
I need to figure out a better way to make the plunger head. Right now I would have to make it out of solid PVC rod lathed to size, but I'll start reading up on different options.
I'll make a prototype after I finish working on a much sillier project.
Edited by CaptainSlug, 26 February 2008 - 12:35 PM.