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#1
14th November 2011
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Terbang menggunakan Jet Pack
Sekilas tentang Jet Pack : Quote: Sorry sebelumnya, ane males translate. Jadi agan2 translate sendiri aja y.  Quote: What Is A Jetpack? There is some confusion over what a jetpack is/ was/should be. Basically it comes down to a disconnect between what is science, what is engineering and what is �common usage�. Many engineers, particularly in the aviation industry, make distinctions. A gas turbine powered� prop is not a jet but uses gas turbine calculations. Whereas a gas turbine powered fan (turbo fan) they call a �jet� in actuality it could more correctly be called a �gas turbine powered ducted fan�. To most people a device that you strap on your back which burns fuel, makes noise and you fly around in, is a �jetpack�. The majority of people call the Bell Rocket Belt a �jetpack�. Actually it is not what an engineer would call a jet, it is a rocket. However, by the science definition, the coherent stream of steam coming out of the nozzles is a �jet of steam�. So why call our device a �Jetpack�? Well, by both common usage and science it is a jet. We already have jet ski and jet boat. I do not believe that an aviation engineer will be able to convince all those owners to start calling their devices a �water pump propelled boats�. In the end we found that 95% plus of people call it a jetpack when they see it, so why fight that ? If you have a very narrow view of what a �true jetpack� is (i.e. that it is a pure jet) then none have ever been built. The closest would have been the Bell jet belt, but again this was not a �true jet�, it was bypass ratio gas turbine powered. In fact I cannot think of any �true jets� in the GA industry, most are Fanjets. Perhaps now you see that the �correct answer� is far more complicated and debatable, so much so that normally it is not worth even starting the discussion, because the �correct� answer relates to opinion not fact. Susah ngebayangin Jet Pack tuh kayak apa y?? neh ane kasi fotonya buat agan :   ***  ***  ***  ***  ***  ***  ***  buat agan-agan mo nyobain , mo beli ato sekedar liat-liat Quote: http://www.martinjetpack.com/ Sebelumnya mohon  semoga ga  klo udh terlanjur jangan di kasi   Terkait:
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