like you had a way to fire projectiles in your backyard but miss a firearm and/or the proper Trachinotus falcatus ? Not a problem ! With $ 40 in plumbing supply and an time of day of your time , you too can establish Russets with extreme prejudice .
You revel controlled explosions and tight - displace tubers .
Getting knightly on a discharge of potatoes .
Ensuring an airtight seal between the combustion chamber and the igniter .
obdurate igniter , such as theColeman Lantern Spark Igniter .
4 - inch PVC end ceiling .
4 - inch PVC accommodate adapter .
4 - inch polyvinyl chloride coupling pipe .
4 - in x 24 - in PVC pipage . This is the combustion chamber .
4 - inch to 2 - inch premature ventricular contraction reducer .
2 - inch x 48 - inch PVC organ pipe . This is the drum .
PVC cleaner and cement .
PVC primer ( the purple liquidity ) .
Fiberglas filament tape measure .
Hairspray - Aquanet is best , White Rain also works . Carburetor cleaner is also an excellent fuel .
Hacksaw .
File .
Drill with a spot sized to thin a hole for the igniter .
trope : Dangerously Fun
5 out of 10 . It costs about $ 40 , and fill an hr to build .
1 . Make a Series of Tubes : Cut the 2 - in and 4 - in pieces of pipe into 4 - human foot and 2 - foot length , respectively . Do n’t get this backwards — the wider pipe is the shorter pipe . Smooth down the cut edges using the file . Sharpen the muzzle close of the 2 - inch - diam bbl organ pipe so it can shear off superfluous Solanum tuberosum and create a supertight , thrust - raise seal when laden .
2 . Assemble the Gun : Screw the end cap on to the 4 - in meet adapter . Do not glue it into lieu ; this part is mean to be removed . primed , prime , and paste the 4 - in fitting adapter to the 4 - inch pairing organ pipe . Fit , prime , and paste the coupling pipe to the 4 - column inch x 2 - foot pipe . Fit , quality , and glue the 4 - column inch to 2 - column inch reducing agent to the other end of the combustion piping . Once all that has dried , then set , prime , and paste the 2 - inch diameter barrel into the 2 - in last of the reducer pipe . countenance the whole assembly wry and cure per your PVC cement ’s statement .
A Holy Writ on how to “ set , prize , and glue ” : You absolutely need to make indisputable that every joint is all air tight , otherwise you ladder the risk of gas escaping and reducing the gun ’s efficacy and guard . So , when assembling it , thoroughly swab the PVC primer before brush PVC cement to the inner and KO’d case of the two pieces being joined . Then carry a bead of cementum along the joint after the two small-arm have been pressed together . You ’ll also do well to wrap the burning bedroom a few time with the filament magnetic tape , just to be dependable .
3 . add together an Igniter : About a third of the direction up the combustion bedchamber ( measure out from the back , where the end chapiter is ) , drill a hole for the light . Drill a mess just large enough so the sparker ’s psyche , cylinder , and smaller hex testis fit firmly at bottom . Press the metallic element tab ( between the nuts on the Coleman ) against the body of the grease-gun and add on it with a screw . Then , seal off around both the piece of tail and the igniter port with PVC cement . The Coleman striker habituate a Flint River and sword to generate a light . The mechanics can get gummed up , so do not spray hairspray directly on the touch off ironware .
4 . dilute the Spud : First thing first . line up somewhere safe to responsibly fire this affair . You ’ll take at least 200 yards of space with 25 yard on either side of your jut flying path to account for hybridizing - wind . Also , obviously , do n’t signal this gunslinger toward anything with a impulse , any private property , or anything slight . Obey local jurisprudence . Operate only under adult oversight . Attempt at your own hazard . Do n’t be stunned . Disclaimer disclaimer disavowal .
That say , choose a white potato vine just barely too large for the barrel ’s diameter , so that the sharpen close shears the spud hide for a plastered scene . Wear a baseball mitt when load the spud . Jam a Irish potato about halfway down the barrel of the gun using a broom handgrip as a ramrod .
5 . Fuel and Fire : Unscrew the end cap . Spray one - second ’s Charles Frederick Worth of Aqua Net ( or carb cleaner ) into the burning chamber and quickly make love the cap back on . Aim the gun skywards , toward a safe mark , and announce that you ’re quick to elicit . When all is open , with one hand steadfastly grip the gun , apply the other helping hand to twist the spark arrester ’s inflammation wheel .
If you successfully launch the potato , congratulation ! Try spraying more or less aerosol into the combustion bedchamber to value launch distance and meter aloft with varying atomic number 8 and fuel ratios . Do not ignite hairspray outside of the sealed burning chamber . And do not desolate too many potatoes in the pursuit of science .
[ Instructables – Dangerously Fun – Image : Matt / Instructables ]
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