The shock will yank the hook out of the bait.
PeteS, Did you use the cannon in your post above with a 48" 1.5" barrel ? And you used a 0.8:1 ratio with a 7oz plug and got 600' ?
Is your sprinkler valve modified on the inside for more volume ?

If I go with a 54" barrel, what ratio would I use to push an 8oz slug out that much barrel ?
Still working on cannon design and volume of chamber.

Jackssmirkingrevenge, Nice, A spring loaded ball valve, could work. As far as air dump speed for a 1.5 barrel, what valve would you use ?

Cool (punn intended again).

Yea, dont use a line on it. I think it will be close enough for a test. After the shot, you may have some suggestions on what you would do to make a cannon to launch out 500' or so.
What are you going to use for a projectile ?

Yea, give it a shot (punn intended) See if it will launch 8oz and how far it will go. I looked at sprinkler valves at lowes and it looks like there is not much volume flow inside it compaired to a 1" brass ball valve. Will the modified 1" sprinkler valve dump the volume of air as fast as I can flip ...

Thanks, Have you seen some of the bait launcher videos on youtube? Do you think your type of cannon will launch about 8oz of bait and sinker (in a sabot or frozen) out 500'?
Is a sprinkler valve fast? And how do you modify it?
Also, How much tank to barrel for that kind of weight?

What psi do you think? Is 40 psi enough?

jrrdw, The potato sabot could work or I could make a mold to freeze the bait and sinker in water that would melt away. I think I would need an 1.5" bore for sinker and bait dia. I'm thinking about a 1.5" (1.875 od) pvc 5" long inside a 4" pvc pipe kinda like what is in that video. Thoughts? mark.f, ...

Sorry it takes so long to reply because I am new and my posts need to be approved through a moderator be for posting. As for size of bait, I use a 6 oz pyamid sinker and a crab, small fish or sand fleas. The small fish is about 2" tall and 6" long. It could be stuck into a 1 1/2" bore. Also I just t...

Is one quieter then the other? Dont need to draw attention on the beach. Also, do you know if it is legal to use gas or air cannons on the beach in Florida?

I hope I am asking this in the proper area. I have no clue on how to build or how your air guns work but I want to make an air cannon to send send my fishing bait out 500' or so. I am tired and to old to wade armpit deep into shark waters to cast my line out as far as I can. I saw a few youtubes on ...