
Originally Posted by
1950landy
As kids we had fireworks guns made from galv water pipe threaded one end with screw on cap with small hole for tupans bunger wick to come through . we would drop a marble in the other end & light the wick . Marble would go through two sides of a 44gal drum . We were young & stupid back then .

I had a potato gun also , you would push the front of the gun into a potato & it would fire a plug of potato about the size of a rubber on the top of a pencil , think it worked on water pressure because it was also a water pistol. All I know if you got hit with the potato pellet it hurt & left a bruise.
The spud gun
Works with air pressure but also can shoot water
We used to get cast ally ones, also remember the plastic ones similar to these
Potato Gun | Mad About Science
We also built our own
100mm to 60mm reducer, screwed cap on the 100mm end, about 1 meter of 60mm pipe on the other
Gas igniter in the 100mm end
Spray in some carby clean, load a spud (or lemon)
Push it down the tube (compression 
)
Click the ignition and BOOM
Watch the flying potato go through the neighbours fence (run and hide)🤭
(Good idea to wrap a rag around the big end in case of rupture, don’t, I repeat don’t use oxy acetylene, guarantee rupture, even though it makes the spud fly a couple of hundred metres through the air
)
Oh yeah
Don’t tell the kids 


Gav
1985 110 Dual Cab 4.6 R380 ARB Lockers (currently NIS due to roof kissing road)
1985 110 Station Wagon 3.5 LT85 (unmolested blank canvas)
Bookmarks