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- Apr 2, 2006
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royabulgaf said:Can anyone advise me here? It would seem that there is no way to hide the rotor. Is there any real point in making a "stealth" coptor?
overscan said:Sure. Also if you can use composites for the rotor they may be largely radar transparent.
mz said:I think ducted fans are really heavy for the lift they produce.
It's kinda counterintuitive how you get high T/W either with open rotors, because they effect a large mass of air, or afterburning turbojets (high fuel consumption in the latter case though, even higher T/W and higher fuel consmuption with rockets btw) because their exhaust velocity is high, but there's a "valley" in between. Or so I think.
The tipjet/CC concept emerged from CDRKNSWC, previously known as David Taylor Naval Research Center (DTNRC), based on extensive research and development of stopped rotor VTOL concepts, CC airfoils, and airflow management systems over the past 30 years. (...) The DTNRC's tipjet concept is 12,000 pound Vertical Launch and Recovery (VLAR) Unmanned Aerial Vehicle (UAV), and its success may provide a breakthrough in ship-based aircraft capabilities because it is designed to carry a 2,000 pound payload at 35,000 feet altitude for 12 hours. Investigations into critical aerodynamic and pneumatic issues have been performed using subscale wind tunnel model of the rotor/wing system. These tests were done primarily for hover, and they included performance assessment of the Circulation Control rotor, the reaction drive system performance, and the integrated lift/drive system performance.
Thanx alot Stargazer.Stargazer2006 said:MMIRA was simply the first name of the K-1200 or K-MAX.