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"I don't have an e-mail address. As much as I admire the Internet I suffer literally agoraphobia, which in it's original sense means a fear of the marketplace. I do not want to receive three hundred e-mail messages per week from strangers…"
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| Jump Harness | ||
| A device small enough to be worn as a backpack, that gave booster power for jumping. |
Heinlein does not give any real details as to how this is accomplished. I think the use of the device serves a literary purpose, though; a simple word like "jump" goes well with the teen "cherubs."
| "Cherub here!" A youngster in his teens came dashing up. He was dressed in short full robe, tights, slippers and pigeon's wings. Boone ordered "Fly up to the Sanctum office and tell the Warden on duty that I want another pilgrim's badge at the Sanctuary gate right away. The word is 'Mars.'" "'Mars,'" the kid repeated, threw Boone a Scout salute and made a sixty-foot leap over the crowd. Jill realized why the robe looked bulky; it concealed a jump harness. |
| Technovelgy from Stranger in a Strange Land,
by Robert Heinlein. Published by Putnam in 1961 Additional resources -
|
Heinlein is not the first author to use the idea; I think that the creators of Buck Rogers also used one in the 1920's.
Here's a nice illustration and quote from Final Command, a 1949 story by AE van Vogt:
Barr descended more slowly. He had come deliberately, seeking atmosphere and impressions. As he stepped to the ground, a flying robot whisked past only a few hundred feet up. Then another, and a dozen more. He stepped to the sidewalk, and watched them, stimulated.
They were hovering now around a tower several hundred yards along the street. Cautiously, weapons visible and ready, they dosed in on the upper reaches of the lower. Across the street, other robots— also wearing their flying attachments— swooped up to the top of a many-storied building. Like most business structures, it bad entrances at each office where robots, going to work could land.
German engineers created the "Himmelstürmer" (Skystormer) towards the end of WWII. This device allowed jumps of up to 180 feet in length, with a height of about fifty feet.
After the war, the device was turned over to Bell Aerosystems. Wendell Moore, an engineer with Bell Aerosystems in 1953, is credited with the first workable rocket belt. Moore then called the device the un-romantic name of Small Rocket Lift Device, or SRLD. This was the type of jetpack used in the James Bond film Thunderball.
(Flying attachment from 'Final Command' by AE van Vogt)
(Bell Aerospace Rocket Belt)
Among the many technical difficulties encountered in real life were a lack of stability in flight and the weight of the propellant.
It's probable that Heinlein took the idea from the Jump Belt, created in 1958 by Garry Burdett and Alexander Bohr of the Thiokol Corporation. Compressed nitrogen gas was used for propulsion; two nozzles at belt level (directed downwards) produced enough thrust to jump higher and run faster. Like Heinlein's jump harness, it was not a true flying device.
For a modern version of a device like this, take a look at Swiss Rocket Man.
Compare to the individual flyer from Asteroid Pirates (1938) by Royal Heckman and the copter harness from The Star Beast (1954) by Robert Heinlein.
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Additional
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Tech news articles related to Stranger in a Strange Land
Tech news articles related to works by Robert Heinlein
Jump Harness-related
news articles:
- Jetpack From New Zealand Takes Off
- Megachurches Catch Up To Heinlein
| Nifty Folding Electric Bicycles! |
| Boring Company Drills Asimov's Single Vehicle Tunnels |
| Boring Company Vegas Loop Like Asimov Said |
| SpaceX Rocket Shuttle Point-To-Point On Earth |
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