tag:blogger.com,1999:blog-4700625253696133124.post7792196367020817565..comments2024-02-25T03:22:25.321-05:00Comments on Homemade Defense: X2 Advanced Technology HelicopterUnknownnoreply@blogger.comBlogger2125tag:blogger.com,1999:blog-4700625253696133124.post-74977353475390737912009-12-12T20:28:53.176-05:002009-12-12T20:28:53.176-05:00Thanks for the info, Man you should write your own...Thanks for the info, Man you should write your own blog. Seriously, you clearly know more about this than I do. I just read that shit about the rotors on wikipedia.Kevlarhttps://www.blogger.com/profile/01162202811648412537noreply@blogger.comtag:blogger.com,1999:blog-4700625253696133124.post-74504458199005046882009-12-09T13:32:10.448-05:002009-12-09T13:32:10.448-05:00Just wanted to clarify your comment about the adva...Just wanted to clarify your comment about the advancing tip speed limitation for most rotorcraft. For normal helicopters, the primary level flight speed limitation is just the drag of the airframe and rotor increasing far faster than one can produce forward thrust with a rotor. This explains the "compound" nature (the prop on the back) to direct more energy to pure thrust than one can produce with the rotor disk alone. You'll also notice how "clean" the X2 is, including faired rotorhead to reduce drag. The tip speed issue comes into play at higher speeds than most helos can achieve under normal level flight conditions. The contra-rotating rotor does two things to avoid this, first, it slows down at very high forward speed to reduce the tip velocity (to keep it subsonic) in comparison to the aircraft speed and second, since there is always one side of the two rotors moving forward, it prevents assymetry of lift produced by the retreating side of the rotor disk. <br /><br />. . . and I quite agree, the X2 has huge potential. <br /><br />Another interesting thing about it, it is being developed by company funds only - probably a reaction to Pentagon "suits" who are constantly trying to "Sovietize" and centralize US rotary wing industry. Of course, with DoD civilian "experts" directing it all from the 3rd floor of the Pentagon - this drives our military guys and industry insane - so, it forces the company to forego DoD funding, extends development time, slows innovation, but we have to do it that way, to avoid getting F'd with and having OSD dweebs screw it up.Anonymousnoreply@blogger.com