The main frame of Xingfeng's "Dragon Kicking Suit" has been completed, and the remaining part still needs to wait for the completion of the test of the Mark 2 suit before it can be finalized.

It just so happened that the time was about the same, and Stark immediately skillfully changed into the Mark 2 suit, activated the power system and left the underground garage.

Coming to the sea and entering the blind spot area of the ground radar, Stark said impatiently: "Okay, let's see what kind of limit this thing can reach, first try its speed." ”

"Jarvis, help me check, what is the record of the SR-71 Blackbird reconnaissance aircraft?"

The "Blackbird" aircraft was developed by Lockheed Corporation in 1959 and is a high-altitude and high-speed reconnaissance aircraft, and it is the first aircraft in the world to realize the "double three" plane.

Although it is a product of catching ducks on the shelves, there are still many unsolved problems in itself, and there is no way to carry out large-scale mass production.

But even on a global level, it is definitely one of the greatest wonders in the history of human jet aircraft.

The significance of its existence is no less than that of the Valkyrie, Concorde, A380 large passenger aircraft and Boeing 747, etc., which changed the history of human aviation.

At present, there are three generations of Blackbird series aircraft, which are......

CIA single-seat reconnaissance aircraft, A-12 "Oxcart" and subsequent variants; experimental fighter YF-12; Strategic reconnaissance aircraft SR-71 reconnaissance aircraft of the US Air Force.

These three models of Blackbird fighters were built 15, 3 and 31 respectively.

However, there are only four Blackbirds left that are already in use.

"Sir, the current maximum speed of fixed-wing manned aircraft is 3.5 times the speed of sound, and the peak altitude is 95,000 feet. Jarvis analyzed rationally.

"Records are meant to be broken, come on!" Stark shouted excitedly, and continued to increase the main load thrust of his legs to the maximum.

"Bang!"

An umbrella-shaped white sound barrier appeared on Stark's head, then broke in the blink of an eye in the midst of a bang, moving to the middle of his legs.

"Wow-"

Feeling this powerful push, Stark's brain was affected by the adrenaline rush secretion, and the whole person entered a state of extreme euphoria.

"It's amazing how powerful it is to be able to easily break the sound barrier in two seconds." In the underground garage workshop, Inson looked at Stark in the screen and was stunned.

"No, supersonic speed is not the limit, its speed is still climbing at breakneck speed."

With Xingfeng's words, the speed data monitoring on the display is still increasing rapidly.

468 m/s ...... 520 m/s ...... 632 m/s ...... 800 m/s ......

Less than five seconds passed, Stark's flight speed broke through the 800 meters per second mark.

That is, the speed is "2880 kilometers per hour"!

"Whoa—"

The Mark suit is wrapped in a sonic boom cloud, and its form is completely impossible to see with the naked eye.

"Sir, the current speed has exceeded twice the speed of sound, the temperature of the body is over 400 degrees, and it is climbing at a rate of 100 degrees per second, and it is expected that it will reach the limit of tolerance in 2 seconds, it is recommended to stop accelerating immediately." Jarvis integrated all of the body's monitoring data and fed back to Stark.

"Wow, this feels like a blast."

Stark didn't want to turn into a roast suckling pig, and seeing that he had reached the desired value, he began to gradually reduce his flight speed and draw a perfect curve in the air.

Rush vertically into the dark night sky!

"Now let's challenge the height, 95,000 feet, come on."

Whew-

The Mark 2 suit, which maintained twice the speed of sound, soon exceeded 2,000 meters under Stark's control and entered the lowest troposphere.

"Sir, now that we have entered the troposphere, the current surface temperature is 256 degrees, and the temperature will drop by 7-8 degrees for every 1,000 meters of increase, and it is expected that after 12,000 meters, the surface is likely to start to freeze severely." Jarvis reported.

"Now it's the limit test, whatever it is, keep going!" Stark, who was completely in a state of euphoria, shouted loudly without fear.

Poof-

The propulsion is strengthened again, and the flight speed, which has been attenuated by the upward thrust, begins to increase again.

3000 m ...... 5000 m ...... 7000 m ...... 10,000 meters......

As the Mark 2 suit continued to climb, when the height exceeded 10,000 meters, the exterior of the machine began to face a thin layer of frost on the street.

And this is inside the underground garage!

"The signal has been cut off, and I don't know how Stark is doing now." Inson watched as the screen turned pitch black, and his excitement gave way to worry.

"Don't worry, nothing will happen!" How powerful Mark's suit is, as a traverser, even knows better than Stark.

"Hopefully, may God bless him." With Stark in sight, Inson can only pray for him.

Boom Boom Boom ......

At an altitude of 10,000 meters, the Mark 2 suit dragged the rumbling sound of breaking through the sound barrier, and with the change of time and altitude, the frost on the surface began to turn into a thin layer of ice.

By the time the altitude reached 12,000 meters, the ice had thickened to cover the entire body.

"Higher, higher, baby, come on!" The flight altitude limit of the SR-71 Blackbird reconnaissance plane is 30,000 meters, and now it is only 212,000 meters.

Unfortunately, it backfired!

The altitude came to 13,215 meters, and the temperature of the body reached -156 degrees.

The entire body of the Mark 2 suit is covered with more than a centimeter of ice, which not only affects flexibility, but also affects the propulsion system.

"Crack, tom, poof!"

The power thruster under the sole of the foot emitted a piercing sound, followed by a flash of blue-white sparks, and the jetted flame stream disappeared.

"Squeak~"

Due to the extremely low temperatures, the power transmission system of the Mark 2 suit, as well as all other equipment, also ceased to operate after the power propulsion system went out of control.

It properly turned into a lump of iron flying at an altitude of more than 10,000 meters.

"Ahh

Stark, who was originally charging with a powerful momentum, danced in the air shouting under the influence of the inertia of pushing residual force.

After floating for a short half second, the Mark 2 suit, which had no power support, finally lost to the gravitational pull of the earth and smashed vertically towards the ground at more than 13,000 meters.

"I'm frozen, I'm frozen, the systems are all out of order, Jarvis! Activate the Prepare Assist System and start the machine self-test program to break the ice. ”

The self-test program operates the exterior of the entire Mark suit, which Stark wants to use to remove the ice that has congealed on the surface.

Then, through the preparation support system, the program of the Mark suit is forcibly restarted.