Amazing Vid Froms Some Local Lads,funny As F**k Not Trials!

[Trials boy Joe]

Hey,

Some local lads I know made a potato cannon thats flame powered, this vid is funny as f**k

POTATO CANNON VID

ENJOY :)

Joe

[Phill_Monks]

haha should be well funny

downloading now...

Phil

[Matthews]

Ha yer Joe funni as f**k

To get it into d lake from der is Mileage

[Jaffacakes]

Hahaha

That's awesome!

[David]

lmfao, I wanna make one!!!

[Simon]

Thats a bit powerfull.

Was good until those dickheads ruined it by going to far.

[Danny]

We've considered making one before but they are highly dangerous especially if they get jammed

[mr ailsbury]

aha mint! how exactly did they make that??

[Danny]

Hairspray, PVC Pipe, Cooker Igniter.

[Siders77]

We've considered making one before but they are highly dangerous especially if they get jammed

Bah, don't be such a phag.

Funny as hell haha!

[anzo]

Ive made one of those beasts before, mine was awsome.

I used a metal tube,

Electical ignition wiring and ignition box

petrol in a spray/mist bottle

and potatoes.

Loadsa fun to make and play with

[anzo]

Well, I must thank you for remind me about these little toys, they are awsome. I'm going to make one this weekend me thinks.

[Jason]

Thats a bit powerfull.

Was good until those dickheads ruined it by going to far.

yeh just to clarify, that kid doesn't normally hang around with us. He's some weirdo who came up, and ruined the fun. Very concerned when he starting doing that

[Greetings]

very enjoyable, might make one this summer

[ogre]

For those wanting to make one of them here's an indepth guide i stole from a site. (sorry for the length)

MATERIALS:

Obtain the following items: (qty 1 unless so indicated in [])

10" of 4" SCH40 PVC water pipe (chamber body)

36" of 1 1/2" SCH40 PVC water pipe (barrel stock) Or get yourself a piece of SGTC rifled barrel stock.

4" PVC coupler

4" x 1.5" PVC bushing (if not available combine two, like 4x3 and 3x1.5)

4" PVC FSxFNPT adapter (clean-out adapter)

4" PVC MNPT threaded plug

PVC primer, one with dye in it if possible (purple, blue)

PVC pipe cement, medium body is best

[2] #8x2 1/2" flat or round head allthread machine screws, drive not important

Two feet of 16g or lower stranded insulated wire

Electrical and Duct tape (of course!)

Red button BBQ ignitor/striker, a replacement found near new BBQ's (find one for a grill w/side burner if possible)

EQUIPMENT/TOOLS:

Suggested tools for building the potato launcher:

Hand wood saw (or hacksaw, for cutting pipe, maybe you already got it cut at the store)

Pocket knife

Needle Nose Pliers

Soldering Iron w/PbSn or Pb free solder (or just use tape and hope it works)

Drill motor with bit 0.010" larger than machine screw shank

Appropriate driving tool for machine screw (probably Phillips)

Medium half round file for shaping pipe (or a lathe if you got one)

Rag for PVC cement clean up (disposable)

Step 2: Preparing the materials for assembly

To make sure everything goes together properly and smoothly, proper conditioning and sizing of the materials is necessary. Pay particular attention to the shaping of the pipe ends, as this is a major factor in proper solvent welding with the fittings.

PVC PIPE SIZING

Cut the two pipes to size, 10" and 36" with the saw unless you already did so in the store. Using the file, take off the sharp corners on the inside AND outside of the pipe. Radiusing the inside helps reduce the amount of potato scud that can build up in the launcher, and breaking the outside corner ensures proper solvent welding, if this is not done leak paths may result. Cut ends should be as square as possible. To one end of the 1 1/2" pipe it is suggested that the inside be chamfered about 0.020" and the outside filed or turned down to almost meet the inner chamfer, creating a blunt knife to help size the potato. It will work without out this step, but a lot messier!

PVC FITTINGS

Inspect the fitting for really bad weld lines or possible large dislocations that may result in premature failure. Remove all paper tags or labels by peeling, scraping, even using a bit of primer to clean off the last adhesive. File off any sharp sprues that may hamper your ability to grip the fittings firmly when assembling.

IGNITION SYSTEM

Cut the wire into two equal lengths. Strip and twist each end about 3/4" back. Taking the BBQ igniter, upon inspection you should find a plug on the tail end (one electrode site) and close inspection should reveal a very fine wire embedded in the side body of the igniter, close to the button lip.(if you have a 2 pole ignitor -- side burner type -- this step will be much easier) This fine wire is attached to the igniter nearest the button, as the wire is just pressed into this slot which might be about 3/4" long. Carefully extract the other end of the wire with the knife, removing all but the last 1/4" or so from the slot. Carefully twist this wire to one end of one electrode wire stripped previously. Immediately solder this connection together taking care to not break or extricate the fine wire from the plunger body. Cool with spit (really!), dry, and tape this joint back against the body with electrical tape, using enough to immobilize the wire with gentle tension.

Take the wire supplied with the igniter, the one with the plug that fits on the base, and cut leaving about 2" from the plug end that will fit into the base of the igniter. Strip and twist this stub to the other electrode wire, soldering, and taping over the solder joint. You now have an igniter to make a 'remote' spark. Try it holding the two free electrode wire ends about 1/4" apart--don't touch them! (your BBQ igniter may be a bit different, the idea is to get both electrodes away from the igniter, so you don't make a big hole in the launcher combustion chamber.)

Step 3: Assembling the Launcher

Now you get to stick all the stuff together, using pipe glue and tape and more solder if you like! Just don't breathe too much pipe glue solvent...it'll make you nuts!

I Chamber Assembly:

Prime both ends of the 4" pipe, also priming the 4" bushing, both 4" coupler sockets, and 4" slip on the adapter. DO NOT get any primer on the adapter threads! Immediately apply pipe cement to the three primed 4" fittings, then LIBERALLY to both ends of the 4" pipe. Start both the coupler and adapter fittings on the pipe, start the bushing in the coupler, then right the assembly with the threads up, pressing it together with body weight while twisting about 1/2 turn. Hold this position for at least 30 seconds. The pipe ends should bottom each about 1 1/2" inside the fitting socket. If they both do not bottom, either apply more force IMMEDIATELY somehow to get it to, or you are screwed and have to throw it out--start over with that. If the fittings and pipe are properly conditioned this should not be a problem. Wipe up any spilled glue with the rag, but leave a good bead at the external pipe/fittings line. If any glue got on the threads get it out of there as fast as possible! Any glue on your hands should just be left to dry and then peel it off. Using solvent to remove it will just increase your exposure to it.

II Electrode Installation:

Wait about 10 minutes for the glue to set. Using the proper size drill bit, put two radial holes 90deg apart about 1/2" back from the front edge of the adapter fitting--the plastic here is about 1/2" thick as well. Drive in the two machine screws nearly all the way, leaving about 1/8" between the screw head base and the plastic. The ends may touch or be far apart--the electrode gap will be calibrated after the electrode wires are connected.

III Barrel Introduction:

Prime one end of the barrel and the 1.5" socket on the bushing. If one end of the barrel was chamfered to a knide, prime the square 'regular' end of the pipe. Apply glue, liberally to the pipe, and press together, again using a 1/4 turn motion to bottom. Hold for 30+ seconds. After releasing place the unit upright for several minutes, to let the glue set a little more. Solvent welding is more of a curing than a drying process. Solvent is lost, hence the term drying, but the action of the solvent effectively cures all those individual plastic parts into one continuous physically joined piece of plastic. Properly done, solvent welds are always stronger than bulk pipe.

IV Wire it Up:

Tin the two free ends of the electrode wires if possible. With each end bend it around the screw shank, just below the head, in a clockwise manner (you may need needle-nose pliers if the wire is heavy). After the wire is at least 3/4 turn around the shank, tighten the screw, pretty good, biting the wire into the plastic a little. Liberally apply electrical tape, rubber tape, or silicone RTV to the exposed metal areas, as they will shock you all day long if not insulated properly. Before taping tug on the wires a little to make sure they are firmly gripped by the screw head.

V Electrode Calibration:

Setting the gap is next. The two screws may be in a variety of relative positions, depending on how straight and aligned the holes were drilled. Wearing leather gloves, you now want to somehow create about a 1/4" gap between the screws. This gap does not have to be measured from the very tip of the screw, and the spark will find the shortest route possible. Bend only one screw if possible, and dont bend it around a whole bunch back and forth, or it will get work hardened and break sometime. DO NOT test the spark device yet, as there are still PVC solvent fumes all over the place. Just wind sufficient tape around the ignitor body to fully insulate all metal parts from your hand when you grip it. Lash it to the side of the chamber if you like with electrical or duct tape, just don't press the button yet!

Step 4: All put together...now you wait

IT IS HIGHLY RECCOMMENDED THAT YOU WAIT AT LEAST 24 HOURS FOR THE GLUE TO FULLY CURE AND SOLVENT TO DISSIPATE.

Many of the unfortunate potato launching accidents occur due to over anxious constructors/operators getting a little trigger happy a little too early. Keep in mind that the solvent fumes are extremely flamable. A few notable events include people chemically/thermally removing a majority of the hair on their head, or rapidly separating the supposedly single piece of PVC plastic back into its purchased components (or even smaller pieces!) Just wait...it'll be worth it.

In the mean time this is a great opportunity to gather what you may need when you do start running this device. On the top of this list is certainly a bag (or two...or three...) of good fresh potatoes. Never use old sprouting, skunky potatoes, this is just bad form! Buy a bag for $2 and relish in their crispness! Also a fuel, probably starting with hairspray, the old mainstay. Traditionally the 'Aqua-Net' brand has yielded to best results, but it will be mighty hard to find those folks who grew up on that. Once you get more experience you might graduate to propane...but wait a bit. A good location is also required...don't use this device in the middle of your subdivision out of your garage or you are guaranteeing that old grandpa down the way will call the cops!

Step 5: Using the launcher

Again, find a suitable location to deploy your potatoes, as the device can get quite loud with a good fuel load. Out in the sticks is best, but just not downtown!

1. After waiting the necessary time for the solvent vapors to dissipate, now you can test the ignition device. Depressing the plunger briskly should produce a good spark to jump across the screw threads. If all connections were made correctly and the gap is about 1/4" it should spark every time (or at least 9 times out of 10). If it doesn't check your connections, maybe set the gap a little closer (never less than 1/8") but get it to work, or potatoes are going nowhere (unless you throw them--boring!)

2. When a reliable spark is verified, test fit the threaded plug into the adapter. It shold engage the threads at LEAST TWO TURNS. If not, check for crud in the threads, and if clear, obtain a 60deg triangle diamond file, and size down the plug threads a little. The threads are at a 60deg angle, so careful filing about the first few threads is ok.

3. With the cap off, load a potato! With the chamber on the ground, place a potato over the muzzle of the launcher, and press it down with your palm, shaving off the excess, creating a cylindrical potato plug. Make sure the potato contacts the wall firmly all around, or it will not fire or not that well. Loading the potato sideways is acceptable, as it creates a more stable projectile anyway. Ram the potato down to within 2" of the breech of the barrel, using a smaller diameter PVC pipe or broomstick. Don't push it too far or it will fall out into the chamber...and just be subject to a short baking cycle.

4. With the spud firmly seated in the breech, pick up the launcher and holding with one hand, dispense a few seconds of hairspray directly into the chamber. Don't use too much; it will just make a mess. Quickly close by screwing on the end cap hand tight, do not use a tool to tighten to two turns or you will likely never get it off again.

5. Call out "Fire in the hole!", point the launcher in a safe direction, and depress the BBQ plunger. That potato you rammed down there should exit at a quite rapid rate with a sizable report, and depending on where you aimed and at what angle you pointed, it went anywhere from 6 inches to ~200 yards from the muzzle. Pretty cool. If you clicked the ignitor a few times and it didn't work, you are not alone, check out my next section.

6. If it worked, great! Remove the end cap (this may require a tool), vent the spent gasses getting a fresh load of air, and repeat as necessary!

[aaron-i'anson]

Well funny stuff how do you make them?

[Simon]

Er, are you blind?

[Dr Greenthumb]

Well funny stuff how do you make them?

Oh dear lord.......

Should have gone to specsavers.

[Fishy]

Lmao, f**king funny video there, and i thought firing acorns at cows with a home made catapult was dangerous, (however harsh this may seem, it only hurts the cows a little bit, as it is more the shock of having an acorn fired at your ass that hurts the most)

(Bungy cord and a bit of wood)