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#22
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Oshkosh: Kiwi launches $130,000 jetpack: Up, up and away
On Aug 5, 9:38 am, Lou wrote:
showing hubby flying off to work. Here it is, http://www.aa1car.com/blog/popular_m..._car_cover.jpg It's delayed until next year, one or two snags... Ken After reading that article I started saving up for a 1967 flying car. Well all I got to show for it is a fat bank account and nothin' to spend it on. Did you know that there was only one of these built and that it still flies today? Unfortunately no one has a picture of it but I understand that it is responsible for 90% of the crop circles that happen to corn fields. Lou It's a flying Segway, stand on it and lean... http://www.aviastar.org/helicopters_...r_platform.php Ken |
#23
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Oshkosh: Kiwi launches $130,000 jetpack: Up, up and away
On Aug 5, 2:15 pm, jeremy wrote:
Ken S. Tucker wrote: After reading that article I started saving up for a 1967 flying car. Well all I got to show for it is a fat bank account and nothin' to spend it on. I have a long list if you need one :-) JJ If you talkin' this machine, http://www.aviastar.org/helicopters_...r_platform.php I'll become a stock holder+ help out with engineering! Ken PS: lets build a flying car! |
#24
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Oshkosh: Kiwi launches $130,000 jetpack: Up, up and away
"Ken S. Tucker" wrote in news:77bba8d4-003f-4f01-
: On Aug 5, 9:38 am, Lou wrote: showing hubby flying off to work. Here it is, http://www.aa1car.com/blog/popular_m..._car_cover.jpg It's delayed until next year, one or two snags... Ken After reading that article I started saving up for a 1967 flying car. Well all I got to show for it is a fat bank account and nothin' to spend it on. Ah, that accounts for your life of luxury on a window washer's salary. Bertie |
#25
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Oshkosh: Kiwi launches $130,000 jetpack: Up, up and away
"Ken S. Tucker" wrote in news:87a8f015-2863-4408-
: On Aug 5, 2:15 pm, jeremy wrote: Ken S. Tucker wrote: After reading that article I started saving up for a 1967 flying car. Well all I got to show for it is a fat bank account and nothin' to spend it on. I have a long list if you need one :-) JJ If you talkin' this machine, Wow, you even type hillbilly. Bertie |
#26
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Oshkosh: Kiwi launches $130,000 jetpack: Up, up and away
John Smith wrote: I did not personally hear anyone booing, but I will tell you that it was a very disappointing performance. It was a very over hyped event. The name "jetpack" is a gross misnomer. It is two ducted fans, similar to a project and device that flew in the US several years ago. It was funded with DARPA money. The prototype was offered for sale after the initial test flights. Wish I could recall the name. It reminds me of the old days of Oshkosh with its unproven performance statistics, high price, and ambitious but speculative claims. I am trying to understand how the engine they have developed will produce the claimed 200 HP. MythBusters built a similar device last year and failed to achieve the lift necessary for flight with off the shelf components. The machine(s) you're thinking of that DARPA funded were Trek Aerospace's SoloTrek and Springtail. Those machines did fly (see video on their website, www.trekaerospace.com), but funding dried up once they achieved DARPA's goals. The MythBusters machine was built loosely to plans purchased through Popular Science or Mechanics Illustrated. Unfortunately, the seller of those plans only ripped off Trek's concept and had not a clue to what was needed to actually get airborn, let alone to achieve stability. The stability issue will also plague Martin's Jetpack. All hovering aircraft are unstable. The lower the moment of inertia (mass), the quicker the machine can get into trouble. These personal hovercraft are very light! And very unstable. The Hiller Flying Platform had mechanical gyros to help stabilize it. The Trek machines had on onboard computer with electronic gyros (a few steps up from that used on the Segway and RC helicopters). If Martin's Jetpack doesn't have anything like that, it will in the near future. The deadman's zone will be a real problem. With no forward flight speed a standard BRS parachute can save you from 75'. The chutes that "pop" open should be ok from 40-50'. The aircraft structure should save you below 5-10'. Unfortunately, the deadman's zone, 10-40' high, is just where the military wants to use these machines; and just where they'd be the most fun to fly, darting between trees. Trek was looking at a twin-engined version. With one engine out you couldn't maintain level flight, but you could descend under control. What Mr. Martin has achieved, on a shoestring budget, is very impressive. He's still got a long way to go before he has anything practical. The fact that he's taking deposits is the truely sad part. |
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