Digital afro media, viral videos, the webs top videos, digital afro media, technology blog, top technology blogs, mashable, cnet, digital trends, digital reviews, tech reviews, gadgets, trending technology, how to's, hacks, search engines, SEO, webs top images, stock images,trending cideos, scince and tech websites, science & technology sites, top scince & technology websites, technorati,digital afro media, the webs top viral videos, webs top videos 2013,bria myles big booty,WSHH models,worldstar hip hop models videos,straight stunting magazine, yammi doll videos, nfl2k14 tips, nfl2k14 tips & tricks, nfl2k14 graphics, nfl2k14 features, nfl2k14 gameplay videos, nfl2k14 top moves, world star candy videos,world star candy, world star fights, world star fights 2013,world star fights 2014,big booty models,league of legends, Lol League , league of legends champions, league of legends champions tips & tricks, league of legends Top fails, league of legends , top plays league of legends ,Top 5, Top 3 ,Pro plays , league of legends Epic plays ,epic fails , league of legends funny fails , league of legends funny fails Funny plays, ,funny moments, ,lol moments, ,league moments ,league fails ,league plays ,random moments ,fail moments ,epic moments , league of legends funny fails, league of legends bronze play , league of legends bronze moments, ,bronze fails , league of legends bronze elo ,high elo , league of legends, Low elo, league of legends random top pro bronze plays epic funny lol moments day week episode gameplay, Bronze, silver, gold, platinum, plat, diamond, challenger, bronze V, division 1 2 3 4 5, LCS gamescom plays fails highlights gameplay, carry low elo, league of legends Top mid middle bot bottom support jungle lane, bronze gameplay, funniest, wtf moments, division, mmr, guides, league of legends commentary, champion spotlight, skin spotlight, summoner showcase, traps, bugs, glitches, glitch, commentary, top 10, top 20 league of legend, kill compilation, pentakill, pentakills, penta quadra triple double kill kills, 1v4 1v5, # 192 193 194 195 196 197 141 142 143 144 145 146 134 135 136 137 138 139 Bronze elo fails plays moments , bad worst lucky unlucky unfortunate plays fails, low elo plays, league of legend low elo fails, league of legends streams, league of legends top players,league of legends top players champions,NBA 2k13, NBA 2k13 My Player, NBA 2k13 Leaked,NBA 2k13 Online Gameplay, NBA 2k13 Crew Mode, NBA 2k13 This Week, NBA 2k13 Glitch, NBA 2k12 MyCareer, NBA 2k13 Official Trailer, NBA 2k13 Gameplay ,NBA 2k13 Cover, NBA 2k13 Today, NBA 2k13 Rookies, NBA 2k13 Dunk Contest, NBA 2k13 E3, NBA 2k13 - Illmaculate Trailer, Chris Smoove, Smoove7182954, IpodKingCarter, QJB, Shady00018, Jay-Z, NBA2k, NBA2k13, NBA2k12, Nike Commercials, Mouth Cam 2K13,NBA 2K13,NBA 2K13 My Player,NBA 2K13 My Career,NBA,NBA 2K13 Soundtrack, NBA 2K13 Chris Smoove,NBA 2K13 Dunk Contest,NBA 2K13 Trailer,NBA 2K13 Review, NBA 2K13 Today,IpodKingCarter NBA 2K13,IpodKingCarter NBA 2K13 PG,IpodKingCarter NBA 2K13 SF,NBA 2K13 IKC,NBA 2K13 Association Mode NBA 2K13, NBA 2K13 MyCAREER, NBA 2K14, NBA 2K14 Career, NBA 2K14 MyTEAM, NBA 2K14 Crew, NBA 2K13 MyTEAM, NBA 2K13 Chris Smoove, NBA 2K13 iPodKingCarter, NBA 2K13 MyTEAM Mode, NBA 2K13 Create a Legend Mode, NBA 2K13 CAL Mode, NBA 2K13 QJB, NBA 2K13 Kspadetheprospect, NBA 2K13 MyCAREER Chris Smoove, NBA 2K13 MyCAREER Mode iPodKingCarter,NBA 2K13 Leaked, NBA 2K14 Leaked,worldstar videos,worldstar hip hop fights,worldstar hip hop models,league of legends champions skins, league of legends champions list,Avengers 2, avengers 2 age of ultron trailer, avengers 2 trailer comic con, avengers 2 spoiler,avengers 2 leaked scripts, avengers 2 characters, avengers 2 clips, avengers 2 trailers, The Avengers: Age Of Ultron SDCC Teaser (2013) - Marvel Movie HD, Avengers age of ultron teaser,Voicing ALL League of Legends Champions (EVEN THE MEN!) Video, 115 League of Legends Champions, Voiced Perfectly By One Girl,
Digital Afro Media
North American XB-70 Valkyrie SST
Total Votes (0) (0) Likes (0) Dislikes

Category: Futuristic Concepts


Courtesy NASA

Originally conceived as a supersonic bomber, the North American XB-70A Valkyrie instead became the world’s largest experimental research aircraft, flying from September 21, 1964, until February 4, 1969.

Two experimental prototypes of the XB-70A were under construction when the bomber program was canceled. At the same time there was growing interest in an American supersonic transport (SST), and the Valkyrie seemed a perfect testbed for SST research. The two prototypes were kept alive for a joint NASA-Air Force flight research program.

The Flight Research Center (FRC — later the Dryden Flight Research Center) had several SST studies underway in the early 1960′s. Its Douglas F5D-1 was used for landing studies, a North American F-100C was modified to simulate SST handling qualities, a North American A-5A was used to develop ways an SST would operate in the air traffic control system, and a Lockheed JetStar was modified as an in-flight SST simulator. But the XB-70A was the first transport-sized aircraft capable of sustained, long-range supersonic flight. Its research programs had a significant impact on American SST efforts at the time and could influence the design of future large, supersonic aircraft.

Although intended to cruise at Mach 3, the first aircraft was found to have poor directional stability above Mach 2.5, and it never flew faster than Mach 2.55 in its flight research at the NASA FRC between 1967 and 1969. However, NASA Ames wind-tunnel studies led North American Aviation, Downey, California, to build its sister ship with an added 5 degrees of dihedral on the wings. It handled much better, and achieved Mach 3.08 on April 12, 1966. Two months later it was lost in a mid-air collision during a formation photo flight.

One of the unique features of the Valkyries were the variable outer wing panels. These were left undeflected at subsonic speeds to take advantage of the full wingspan and wing area and to increase the lift-to-drag ratio and improve takeoff and landing performance.

At supersonic speeds, adequate cruise lift-to-drag ratio could be developed with less wingspan, so the outer panels were folded down. Deflected, they reduced drag as the wingtips interacted with the inlet shock wave in the lower surface flow field. Lowering the wingtips also reduced the area behind the airplane center of gravity (cg). This phenomenon was important because as Mach number increased, the center of pressure moved rearward, so less area aft of the cg caused a reduction of trim drag. The outer panels also provided more vertical surface to improve directional stability.

Your Vote

Suggestions From Futuristic Concepts