VH_man wrote:Yeah. i dont know anyone who made a combustion and HASNT done that. mabey there are some on this fourum, but.....

well im glad to know there are others out there who have been just as dumb.

getting burned does give you a lot of respect for the cannon

ShowNoMercy wrote:What were you thinking? That has to be the dumbest thing to do ever! Ok enough flaming, but yeah dont do that again. As if I need to tell you that.

hah....i deserve it. i really wasnt thinking.

im definately happy with it...and it was a good learning experience.... two days ago, when we were initially building it, we tried test firing, and nothing....took off the barrel to check for spark and looked directly over it (really really really dumb thing to do) well i got spark....and a fireball...

we played with it yesterday, and realized our problem....

we werent loading the potato very far into the barrel, it was only at the tip....as soon as we loaded it properly the potatos flew at least 100+ yards. Im thinking bigger and better guns are to come

posting a few more details/pictures of your launcher will help you get more relevant advice. here are the specs we followed 10" of 4" SCH40 PVC water pipe (chamber body) 36" of 1 1/2" SCH40 PVC water pipe (barrel stock) 4" PVC coupler 4" x 1.5" PVC bushing (if not available combine two, like 4x3 an...

okay, so we followed the instructions from spudtech.com, loaded it up...and well it shoots approximately 20ft...i know we can acheive more...what could i be doing wrong? how much propellant (aquanet hairspray) should be used? how far should the potato be loaded into the barrel?