I need something loud

[bornl33t]

I need something loud. If possible directional but an explosion would be fine also. I would like it cheap so train horns are a little out of my price range and it needs to be at least semi legal. I'm not going to go discharging my 30-06 in the back yard. Lets see how creative everyone is...

[Ando]

Dry Ice and a water bottle.

You can throw it what ever direction you want.

[teufelhunden]

Newborns?

[xero28]

http://www.google.com/search?q=bicycle+air+horn&hl=en&client=safari&rls=en&prmd=ivs&source=univ&tbs=shop:1&tbo=u&ei=-irYTPepB4nmsQP1oqCNCw&sa=X&oi=product_result_group&ct=title&resnum=1&ved=0CC8QrQQwAA&biw=1263&bih=743

Bicycle air horns. You pump them up and they last a few seconds each shot. I've never had one, but a guy I went to college with did and used it in our classroom once. Plenty loud in my opinion.

[cyberave68]

A car battery and a AIR/trian horn. Should run you 60 or so total at Pepboys or just about any auto store. Connect some wire and a switch to the horn and there you go...

[Frizzle Fry]

When I was a kid, I had a spent 75mm shell casing... We used to bring it up to the lake in NH and wreak havoc with it. Basically, you point it at a house a half mile down the lake, toss a lit cherry bomb in, and it goes off like a cannon, rattling the windows of the house at which you point it. The nice bit is, it's barely heard by the people behind you.

I'm not sure what you're using it for, or just how legal it is, but it's both directional and an explosion.

[TheePsycho]

c02 bottle plus the horn that attaches to the bottle is pretty loud.

or this http://www.farmandfleet.com/products...t%3dcar%2bhorn

[WUNDERWAFFEN]

Search Air Raid Siren on ebay. Theres a whole list of them from hand cranked to electric & from $50 and up.

[SCpoloRicker]

Are you married?

[kumijia]

my friend and i were screwing around with a empty 1 liter soda bottle and a model rocket engine. I guess we thought it would launch like a rocket, we were about 15 at the time. we just drilled a small hole in the cap so we could light the engine with cannon fuse. Well it didn't launch the bottle, but it made one hell of loud bang about 8 seconds after it was light. the seam of the bottle split wide open, and i couldn't hear for about 2 minutes. Watch thou, cause once the bottle burst, the engine did fly around hazardously. LOL

[MoeMag]

Oxy acetylene filled balloon. Start small. Work your way up.
/thread

[IrishRedneck86]

yeah oxy/acetylene balloons are gonna be the best bang for your buck if your looking for loud and explosion but not very directional but as stated start small then go bigger cause a little def goes a long way and try not to be really close when you set it off cause depending on the size it can give you a concussion from the shock wave.

my friends and I used to have so much fun with these scaring each other until one guy went to big and knocked himself out and lost his eyebrows and some of his hair.

[Drix]

Can we put one of these balloons inside the 75mm shell?

[IrishRedneck86]

yeah I suppose you could it would make it directional but again be careful of the size not to mention how much pressure can that shell take anymore and you would have to figure a way to pop/ignite it cause we used to take the balloon on a pole end and use a long tig rod that we got red hot to light it off

[Frizzle Fry]

not to mention how much pressure can that shell take

Considering that they were designed to be packed with explosive propellants, plugged air-tight with a solid projectile about 3" in diameter and 10" long, then basically exploded in the direction of your target (multiple times if necessary), I would say there probably isn't too much of a risk involved. That said, if there's any worry, you could try a 105mm shell; they're pretty cheap at Army/Navy stores.