On that occasion he had strapped two rocket engines onto the sides of his Harley Davidson.
Liquid-fuelled rocket engines work by mixing the fuel (in this case kerosene) with liquid oxygen at high pressure.
At one point, we entered an enormous three-chambered room full of men and women working on towering rocket engines.
Building that larger missile would require major advances in metallurgy, rocket engines, guidance and propulsion, and probably foreign assistance.
The giant rocket engines that propelled mankind to the moon have been retrieved from the bottom of the Atlantic Ocean.
It now wants everybody who handles high-power rocket engines to have a federal explosives license and a bunker to store them.
In this way, things like rocket engines, satellites, Mars-exploring rovers, space suits, and water purifiers on the International Space Station become part of everyday life on Earth.
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That's about the fastest that current rocket engines can propel a spacecraft, and it's far shorter than the 253 days Curiosity took to get to Mars in 2012.
The rocket engines remain property of NASA and the U.S. government, and Bezos wrote that he would like to pull the engines to the surface and then have NASA put them on display at a museum in Seattle.
CNN: Amazon chief plans to recover Apollo engines from seafloor
Jeff Greason, the president of XCOR Aerospace, a company that makes rocket engines for suborbital craft, worries that the X Prize, with its attached conditions, may not in practice lead to the right sort of craft being built.
It depends on hypersonic gliding maneuvers, the largest supersonic parachute ever deployed, eight hydrazine rocket engines firing in sequence and an elaborate system of tethers called a "sky crane" that are meant to lower the landing craft gently to the ground.
Unexpected high temperature inside one of the Falcon 9 rocket's engines prompted an automated shutdown less than a second before liftoff.
Blasting off from Florida's Cape Canaveral into overcast skies following a flawless morning countdown, the 157-foot Falcon 9 rocket's engines performed as expected.
The two-stage Falcon 9 rocket uses nine engines to generate 855, 000 pounds of thrust, and is capable of carrying more than than 7, 000 pounds of cargo.
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The rocket launched without a hitch following a flawless countdown that came three days after a faulty valve on one of the rocket's engines forced a last-second postponement.
The concept calls for a two-stage rocket that would be powered by engines burning liquid oxygen and kerosene.
Those worries assume that all of the rocket's nine first-stage engines, as well as its second stage, will burn and shut off on cue.
But the U and 2.1b Soyuz variants use different engines in this segment of the rocket, so no immediate parallels between the two incidents can be drawn.
Amazon.com founder and CEO Jeff Bezos has unveiled plans to recover the F-1 engines that powered the Saturn V rocket carrying Neil Armstrong and the Apollo 11 mission to the moon.
CNN: Amazon chief plans to recover Apollo engines from seafloor
Flying at roughly 30, 000 feet, the craft would climb sharply just as it released the rocket, which would use a cluster of four or five engines to boost itself into orbit.
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It envisions a behemoth mother ship with twin, narrow fuselages, featuring six Boeing Co. 747 engines attached to a record 385-foot wingspan, plus a smaller rocket pod nestled underneath.
WSJ: Microsoft Co-Founder to Build Massive Jet for Space Launches
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