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LRC-150 Mobile Spud Assault Unit

Built a combustion cannon? Then post it here! This section is for completed, finished cannons that you have built. Please include pictures and information.
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LRC-150 Mobile Spud Assault Unit

Unread postAuthor: Binder17 » Tue Jun 19, 2007 7:14 pm

A Propane/MAPP golf ball cannon with 6"X17" chamber and 10 foot golf ball barrel. Can shoot a golf ball up to 1500 yards at 580 fps. Has a 4 inch fan blade mounted on an old power wheels motor. Uses the ignition coil out of a car to fire.

Video Links: http://view.break.com/306475

http://my.break.com/media/view.aspx?ContentID=306659
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Unread postAuthor: TwitchTheAussie » Tue Jun 19, 2007 7:18 pm

Mate I envy you. That is a great cannon and a nice quad. Nice one mate are you gonna paint it?
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Unread postAuthor: spudthug » Tue Jun 19, 2007 7:18 pm

i have seen this somewhere on the internet before...

this is one big ass monster combustion...its kick ass!!!! that thing is really loud...what is charging up before u shoot??


wait is this urs? becasue u neever said any specs or anything about it or how long it took u to build it.. so i was jsut wondering..
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4" piston valved cannon-half done..( i spilt my cement...)

Hybrid- 75% done. need to build propane holder and drill/tap sparkplug hole..
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Unread postAuthor: Fnord » Tue Jun 19, 2007 7:20 pm

Wait, is this a hybrid or something? where are you getting 580 psi from?(edit sorry somehow I misread fps as psi)

I doubt you're really getting 1500 yards; I have a gun about half that size that only does 250 or so.
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Unread postAuthor: Binder17 » Tue Jun 19, 2007 7:25 pm

Fnord, that's 580 FPS. It will shoot over a half mile before hitting the ground on a perfect day. NOthing is charging up before ignition, that is the chamber fan mixing the fuel and air. And I have already painted, just no pics yet.
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Unread postAuthor: Fnord » Tue Jun 19, 2007 7:30 pm

(see my edit^)
Sorry I can't watch the video due to dialup. I guess 1500 yards is possible, it just seems kinda far for a golfball to go(wind resistance and all).
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Unread postAuthor: sandman » Tue Jun 19, 2007 7:39 pm

1500 yards :shock:

thats 6 drives for me, lol

im wondering bout your meter, it looks like there is no pressure gauge on the meter itself, but is that a regulator on the MAPP bottle
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Unread postAuthor: Binder17 » Tue Jun 19, 2007 7:59 pm

Regulator is on the MAPP bottle
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Unread postAuthor: Hotwired » Wed Jun 20, 2007 3:48 am

1500m and a half mile ain't really the same thing.

About 700m difference I'd say.

I'd go with the half mile personally, a whole mile is a hell of a long way.
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Unread postAuthor: jackssmirkingrevenge » Wed Jun 20, 2007 4:14 am

i have seen this somewhere on the internet before


On this same forum actually, Why did you re-post it?
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Unread postAuthor: mark.f » Wed Jun 20, 2007 8:45 am

Wait, why did you repost it Karpa?

And the 1500 yards things doesn't hold a lot of water. Even half-a-mile is really too much.

With GGDT as my external ballistics program, using a muzzle velocity of 580 fps and a Cd of between .2-.3, launch angle configured for optimum considering the velocity and drag coefficient, I'm getting no more than 1500 FEET. That's 500 yards or so.
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Unread postAuthor: sandman » Wed Jun 20, 2007 12:26 pm

Hotwired wrote:a whole mile is a hell of a long way.
63360 inches, why i know that, who knows. Anyway i thought i saw this cannon before.
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Unread postAuthor: Binder17 » Wed Jun 20, 2007 4:26 pm

I didn't repost it. I'm just posting it in the showcase section of the forum since I just realized it existed.
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Unread postAuthor: VH_man » Wed Jun 20, 2007 4:45 pm

MarkHFq: remember that GGDT does not take into account the fluid dynamics involved in the flying projectile. the golf ball has little divits that technically should give it a backspin, causing longer range. thats why golfers can hit the ball so far. its not because they hit it really hard, its because of the backspin.......... i can hit 250 yards without putting ANY power into the club (well some, but alot less than i can do)....

plus, 500 yards is quite a bit................. it takes me about 20 minutes or more to swim that far.........., and aobut 2:00 to row that far...........
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Unread postAuthor: SpudBlaster15 » Wed Jun 20, 2007 6:41 pm

Nice looking gun, but your chamber is WAY too big. You would see an increase in performance if you cut it down to 10 inches or so.

I am going to start making a list of people who make ridiculous range claims.
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