XB-70 SUPERSONIC STRATEGIC BOMBER MACH 3 FLIGHT TEST FILM 71152

this supersonic research plane has already taken a number of steps toward Mach 3 2000 miles an hour at 70,000 feet it's completed phase one a flight test pushed well past the speed of sound its structure has survived a severe proof loading program most recently it's sustained supersonic speed for over one hour first flights are always significant but this one was especially solved a totally new aerodynamic design was involved materials and processes never before used we're getting their initial try coming up at 10 seconds 5 4 3 2 break release now acceleration was rapid liftoff occurred under 5,000 feet normal climb was set after feeling out the controls the gear handle was placed at up the gear went through the first cycle folding the bogies into the second then stopped an alternate plan with gear down kept the plane in flight for over 1 hour both pilots comments and the data obtained showed low speed handling qualities to be very favorable a break had locked the two rear tires blue and started burning but the forward two wheels supported the loan there was no difficulty in bringing the plane to a safe straight-line stop two weeks later the plane was out on the Edwards runway for the second takeoff the plan for this first series of flights was to establish subsonic handling qualities then move up to Mach 1 and beyond with the gear safely up they leveled off at 16,000 feet and ran a long series of stability and flutter checks then climbing toward 35,000 feet a warning light blinked on a hydraulic system had lost pressure now normal precautionary procedures were used the gear was lowered immediately an approach was set for Rogers dry lake touchdown was normal drag shoots and breaks decelerated the plane to a routine stop a week later the third flight most of the low-speed handling qualities were known now with confidence speed was pushed up to point nine five and a data series recorded then afterburners were lit and the xb-70 moved past the speed of sound to mach 1.1 three times it made the jump from sub to supersonic 15 minutes were spent above Mach 1 there was also minor loss of paint where the paint was applied to thick flexing of the structure loosened it and it peeled off the b70 was into supersonic testing just 21 days after first plate another major area of interest was folding the wingtips the tips fall down to increase directional stability this is equivalent to increasing the vertical tail area but without the attendant weight and drag penalties moving the tips down also reinforces compression lift effects and shifts the center of lift forward to minimize trim drag with tips down to 25 degrees full afterburner was selected and speed increased from point nine five to mark one point four almost halfway to the goal three times the speed of sound phase one testing was completed in 34 days with 55 minutes logged above Mach 1 total flight time over 5 hours next on the schedule was a complete proof loading lifting controlling and stabilizing surfaces were loaded to their limits deflection was as predicted and the surfaces met all requirements of high speed flight after thorough proof loading the plane was ready for flight five the start of phase two tests the aim of this series is to move steadily toward Mach 3 and 70,000 feet the bulk of data will be taken above Mach 1 procedure first lures the tips to 25 degrees accelerate to Mach 1.4 then move them fully down 65 degrees with the plane shaped for high-speed throttles were advanced and Mach 1.6 was reached a new high for b-70 performance the sixth mission was at heavyweight 450 7,000 pounds at takeoff data was taken during climb to test altitude at 35,000 feet a hydraulic system showed a pressure drop requiring immediate lowering of the landing gear and returned to base the touchdown on the lakebed was at the heaviest landing weight recorded 370 thousand pounds pressure loss was traced to a leaking hydraulic line flight seven was especially significant at four hundred ninety four thousand powers the takeoff was the heaviest today total time a law was one hour and thirty seven minutes with sixty two minutes of sustained supersonic flight much of the sixty two minutes was spent above Mach one point four tips down three tips look real steady flight with wingtips down is now becoming routine and the tips move to full down early in the test as speed goes up chase planes can only stay with the flight for short periods most of the time it cruises alone I in turn sister I can see it he forgot about another ten minutes a top speed of mach 1.8 seven was recorded and in altitude fifty thousand feet was reached in addition to new speed and altitude eyes much stability and control day with as the plane streaked out over the desert test rain so that's three sisters good ways from yell if you get to chase down here after decelerating engines were shut down and restarted there were two restarts made at Mach one point for another was made at a lower speed mr. jean-marc i-16 old travel comin tidal Inlet ducts bypass doors and ram air scoop were successfully operated on this one hour 37 minute flight the xb-70 a maintained supersonic speeds for one hour on the 24th of March the xb-70 a took off at a weight in excess of 500,000 pounds this liftoff weight was the heaviest get recorded by any aircraft as the aircraft reached Mach 2 the Inlet ducts were started for the first time starting the inlets is accomplished by adjustment of the ramps and bypass doors to position the shock in the throat of the inlets at an altitude of 56,000 feet a speed of Mach 2.14 was reached during this flight supersonic speeds were sustained for 1 hour and 14 minutes another new record 40 minutes were at Mach 2 or above at the end of flight number 8 test time totaled 1042 minutes 3 hours and 49 minutes of which were at supersonic speeds future missions are planned to steadily increase speed and altitude moving thousand miles at 70,000 feet

Channel: PeriscopeFilm

Views: 338,019

Keywords: Periscope Film, Stock Footage, Edwards Air Force Base (Military Post), North American XB-70 Valkyrie (Aircraft Model), XB-, Supersonic Speed (Film Subject), Cold War, Rockwell B-1 Lancer (Aircraft Model), Strategic Bomber (Aircraft Type), Bomber (Aircraft Type), Plane

Id: qzAWfFJqaQc

Length: 9min 36sec (576 seconds)

Published: Mon Mar 09 2015

Reddit Comments

[u/RussianChicks]

Was that the bomber from mission 1 of ace combat zero?

[u/[deleted]]

Remember having to deal with six of these in 6.

[u/Violinnoob]

6:50 The lighting here makes it look like a 90's anime

[u/galm1cypher]

It reminds me of the "secret"XB-70 from breaking arrows