Durchschnittliche Verbrauchermeinungen: 80/100. Die Menge der bewerteten Testberichte für dieses Produkt ist zu niedrig, um einen zuverlässigen alaScore zu errechnen.
Courtesy: NASA Langley Research Center, Dryden Flight Research Center NASA's high-risk, high-payoff Hyper-X Program is ready to attempt its greatest challenge yet - flying a "scramjet"-powered X-43A research vehicle at nearly 10 times the speed of sound. Officials have set Nov. 15 or 16 for the flight, which will take place in restricted US Naval airspace over the Pacific Ocean northwest of Los Angeles. This will be the last and, by far, the fastest of three unpiloted flight tests designed to explore an intriguing alternative to rocket power for space access vehicles. Supersonic combustion ramjets - or scramjets - promise more airplane-like operations for increased affordability, flexibility and safety for ultra high-speed flights within the atmosphere and for the first stage to Earth orbit. The scramjet advantage is that, once they are accelerated to about Mach 4 (four times the speed of sound) by a conventional jet airplane engine, it is believed that they can be flown in the atmosphere up to about Mach 15 without having to carry heavy oxygen tanks as rockets must. Also, rockets tend to produce full thrust or nearly full thrust all the time; scramjets can be throttled back and flown more like an airplane. The scramjet concept is simple: Accelerate the vehicle to about Mach 4 by a conventional jet engine, then start the scramjet engine (which has few or no moving parts) by introducing fuel and mixing it with oxygen obtained from the air and compressed for combustion. The <b>...</b>
