When you think of submarines, propane tanks don’t usually come to mind, that is unless…you’re talking about Cal Giordano’s Archduke Grand Excelsior. This homemade 32-foot vessel was handcrafted from a discarded 500-gallon propane tank, a recycled industrial buoy, scrap metal, trailer wheels, aand a Johnson outboard motor. Weighing in at a hefty 3,000-pounds, it has a top speed of 10 knots. Continue reading for more pictures.
“The Archduke Grand Excelsior is a semi-submersible, meaning that it’s not capable of going fully under the water, but it can take its single occupant up to 8-foot below the surface, while the rear portion of the craft remains above the water. The vessel dives by adjusting the front bow planes downwards while moving forwards. This forces the cockpit underwater, however it can only stay underwater while moving. If the speed drops below 3 knots then it rises back to the surface,” reports Diseno-Art.