Ok so u might be wondering thy yet another potato gun design here on indestructibles. Well this is not ur typical spud launcher but its also not the most advanced granted it will evolve into one by the time its finished.
This gun is less than half the sive of the final gun with only a 1" barrel ( the finished project will have a massive 3" barrel), but thats ok because its only realy for test perpouses. Test perpouses? U might ask, and the answer would be most defiantly due to the fact i have never seen all the "advancements" that will be in the final gun. Heck i haven't seen some of the mods im trying to cram into this one gun.
First off u will notice it has 2 combustion chamber let that sink in for a sec....... yes its a crazy cool idea... little harder to make work. but that is what this wos fore after all. im not going to lye and say this is the most BA potato cannon ever but i will say it has the potential to be one of the most extreme guns ive seen. (yes even this small prototype) I can say this because launching from just one chamber i can put grapes thru my chain link fence and about 50 yards onto a wooden fence and make them dissapear.
The reason i say only one chamber is because i have had issues getting constant fuel supply to both chambers usually ill have one chamber way rich and the other spot on. i have had a few test fires with both chambers firing correctly and when they do the lack of barrel is disturbing. (with the 2' barrel it still produced a 1' flame out the end with just one chamber about dubble as u would expect with both chambers) so with all that sad i have the instructions for the small prototype here i will be building a larger one with all the components of the big one next ei, metered propane, chamber fans, support system, and a full length 0.6:1 c:b barrel. all this will be to see just how impossible for me or possible the full size gun will be before i actually make it.
With all that sad if yall do make this gun please share ur experience with me and maby we can make this a nice little potato launcher that can be made for under $50 (so far ive spent only $30 on mine)
Step 1: Parts List
ok so u have shown a little intrest in this project so now ill let u know the causts and parts list
all these parts were sorced from my local home depot prices are ea. (and total per part w/ total at the end)
1 - 1" non threaded t 0.62 (0.62)
2 - 1" threaded 90 deg elbow 1.21 (2.42)
2 - 2" cuppelings 0.86 (1.72)
2 - 1" non threaded 90 deg elbow 0.48 (0.96)
2 - 2" close out caps 0.82 (1.64)
2 - 2" close out cap adaptors 1.18 (2.36)
2 - 2" flush mount 1" adaptors 1.78 (3.56)
2 - 1" * 24" pvc pipe 1.67 (3.34)
1 - 2" * 24" pvc pipe 3.70 (3.70)
1 - battory opperated grill ignitor (walmart) 17.65 (17.95)
i origonaly sorced a solid state grill ignitor from home depot but before i even had the spark gaps adjusted the cheap thing busted so i ran to walmart witch wos closer and cheaper and sorced a battory opperated one for the replacement caust amlost of the solid state one from home depot
its important to try and use solid core pvc i cant stress this enouf ive made about a dosen high power spud guns from this stuff and never once had a fracture or miss hap due to falure of the pvc