Homemade Flame-thrower

8/3/2019 Homemade Flame-thrower

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Flame-thrower Rifle

Designed by Paul Rainwater

These plans are presented for educational and informational purposes only. This device is

not a toy but an incredibly dangerous personal defense weapon. The builder assumes all

responsibility for its construction and use thereof.

Several important details should be pointed out about this devices construction. The

"propane fitting" on DWG 6 is the only part that requires machining. It is advised that a

can of 'Coleman' brand propane be provided to the machinist that is going to do the

work. The "propane fitting" is designed to screw onto 'Coleman' propane bottles. The

propane is used as a pressure source for the gasoline tank. The dished endcaps for the gas

tank are glued onto the PVC tank pipe using PVC glue. The regulator is a "Coilhose

Pneumatics" 0-150 psi regulator with 114"ports. There are two ball valves used which

are "B&K" brand ball valves with 114"ports. As for the ignition coil, almost any 12 volt

ooilwilld~ -

Operation: Fill the gasoline tank 90% full and replace access plug. Ensure that the

propane supply valve is closed. Screw a can of propane onto the "propane fitting" very

quickly in order to minimize propane loss. Back off the regulator (counterclockwise).

Slowly open the propane supply valve and monitor the pressure gauge on the regulator. It

should read zero psig; if it doesn't, then back off the regulator until it reads zero. Once

the propane supply valve is fully opened, slowly rotate the regulator (clockwise) until the

gauge reads 40 psig. The gasoline tank is now pressurized. Check for leaks using a soap

solution and fix any that are found. Once the gasoline tank is bled in, press the button in

the forward handle and squeeze the handle lever. If all systems are working, a 40 ftflame should be expelled.

Refill procedure: Close off the propane valve and crack open the gasoline refill plug until

a healthy leak is heard. Bleed the tank down to 0 psig and remove the gasoline refill plug.

Fill tank with gasoline and replace plug, Open propane valve and repressurize tank.

Shutdown procedure: Close off the propane valve and crack open the gasoline refill plug

until a healthy leak is heard. Bleed the tank down to 0 psig and back off the regulator.



Main P arts L ist

(1) 4" sch40 PVC pipe 24" long

(2) 4" sch40 PV C dished endcaps

(1) 18" long 1/4" copper tubing

(1) 36" long 3/8" copper tubing

(2 ) 'B&K' brand 150 psi 1/4" ball v alv es

(1) 'Coilhose P neum atics' 0-150 psi 1/4" regulator

(1) 36"_long1l2"x 1/8" 5 t 1 . F la t s to ck

(1) 36" long 1I2"x 1/4" stl. F la t s to ck

(1) 36" long li2"x 1/8" a lum . F la t s to ck

(1) 36" long 1/2"x 114" a lum . fla t stock(1) 18" long l"x 114" a lum : F la t stock

(1) 18" long 1/4" st1. R ound stock

(1) 1/4" b ra ss p ip e 5 1 12 " lon g w ith th read ed e nd s

(1) 114" b rass pipe 5" long with th re ad ed e nd s

(1) 12" long brass tubing .125"i.d. . 155"o.d.

(2) 114" b rass female pip e e nd cap s

(1 ) c ompre ssio n sp rin g 2" lo ng 3 /4 " d iam ete r 1 0 lb s/in ch sp ring co nsta nt

{l) 3"10ng 1 1 2 " s t1 .Round s to ck

(I) 90° e lb ow 114" m ale pipe / 3/8" compression

(1) straight 1/4" m ale pipe / 3/8" compression

(2) 1 14 "male pip e p lu gs(3) straight 114" ma le p ip e 1114" compression

(1) 2" long 114" pipe w ith threaded endS ,> ,

(1) 5" d iameter h ose c lamp

(1 ) Mome ntary p ush bu tto n sw itch

(1) 9v olt d oub le p ole rela y

(1) 12volt ig niti on coil

(1) .1 m f 200v capacitor

( 1) aut omo tiv e i gn itio n "cond en se r"

(1) 9vol t ba tt ery

(1) 12volt c amcorde r b atte ry

(1) 1 2" lo ng 3 /4 " 8 t1 .EMT e lec trica l c on duit(1) 12" long 2 112" n om . T hin w alled pipe (chain link f en ce pos t)

(1) 0-150 psig pressure gauge w ith 114"m a le port

( 2) 1 14 -20bo lts x 1 112"long

(3) 1/4-20 bolts x l" long

(3 ) 1 12 -2 0 locknuts

(4) 112-20 nuts

(15) var io us s cr ews



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Homemade Flame-thrower

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