A cannon for sending supplies into space

Anyone else think an underwater cannon, sunk 1600 feet below sea level, that can fire a payload into orbit at 13000 miles per hour is awesome? The next attack in the war on the moon won’t be such a failure :laughing:

A Cannon for Shooting Supplies into Space

[quote]John Hunter wants to shoot stuff into space with a 3,600-foot gun. And he’s dead serious—he’s done the math. Making deliveries to an orbital outpost on a rocket costs $5,000 per pound, but using a space gun would cost just $250 per pound.

Building colossal guns has been Hunter’s pet project since 1992, when, while a physicist at Lawrence Livermore National Laboratory, he first fired a 425-foot gun he built to test-launch hypersonic engines. Its methane-driven piston compressed hydrogen gas, which then expanded up the barrel to shoot a projectile. Mechanical firing can fail, however, so when Hunter’s company, Quicklaunch, released its plans last fall, it swapped the piston for a combustor that burns natural gas. Heat the hydrogen in a confined space and it should build up enough pressure to send a half-ton payload into the sky at 13,000 mph.

Hunter wants to operate the gun, the “Quicklauncher,” in the ocean near the equator, where the Earth’s fast rotation will help slingshot objects into space. A floating cannon—dipping 1,600 feet below sea level and steadied by a ballast system—would let operators swivel it for different orbits. Next month, Hunter will test a functional, 10-foot prototype in a water tank. He says a full-size launcher could be ready in seven years, provided the company can round up the $500 million. Despite the upfront cost, Hunter says he has drawn interest from investors because his reusable gun saves so much cash in the long haul. Just don’t ever expect a ride in the thing: The gun produces 5,000 Gs, so it’s only for fuel tanks and ruggedized satellites. “A person shot out of it would probably get compressed to half their size,” Hunter says. “It’d be over real quick.”[/quote]

Canadian Gerald Bull, courted, then spurned by the US, became friendly with Sadam, and ultimately assassinated by the Israelis, came up with a similar idea years earlier.


The idea of building a space gun has been around for awhile (I think it even featured in one of Jules Verne’s stories), but this is the first time I’ve heard of putting it in the water. Does make sense though, since a land-based system would be harder to move to achieve a different orbital angle.

Putting it at the equator makes sense for another reason (beside gaining orbital spin) - no typhoons. A big typhoon could wreck this thing, but within 10 degrees of the equator, typhoons cannot exist.

Not a bad idea, but I doubt that it will be built. Hope I’m wrong about that.