Under the operation of the crew, the two piston engines drove the five-bladed torque conversion propeller to start rotating rapidly, and the aircraft slowly taxied to the runway, and Xiao Weiguo and they also returned to the ground control tower. Both the people on the plane and the people on the ground control tower are extremely nervous at this time, because whether the modified M30 test aircraft can be successfully lifted into the air, and whether the attitude in the air can be balanced, this is the most critical issue. As the plane taxied more and more down the runway, everyone's heart hung in their throats.

Finally, after taxiing for a distance of nearly a kilometer, the strange plane broke off the ground and began to climb slowly. Fortunately, there was no bad situation during takeoff, although the attitude of the plane was a little unstable, but through the timely adjustment of the crew, it finally swayed and flew into the blue sky.

The plane is slowly climbing, and it is not yet time to start the wind and thunder turboprop engine, and only when it flies to an altitude of 3,000 meters and enters the state of level flight, will the wind and thunder turboprop engine be started according to the test flight plan. But now it climbs slowly, after all, the plane is much heavier, and the engine power has not increased. But when the turboprop engine on the nose starts, the situation will change, and of course the risks are great.

The plane flew farther and farther, and finally turned into a small black dot and disappeared in Xiao Weiguo's eyes. Now everything is communicated by radio. Every five minutes, the crew reports the flight to the ground.

After more than 10 minutes of climbing, the test plane could be regarded as climbing to a test airspace of 3,000 meters. Now that the weather was still good, the crew members checked the equipment and instruments on the plane again, and after confirming that there was no problem, they sent a signal to the ground control tower requesting the start of the Wind Thunder turboprop engine.

Xiao Weiguo hurriedly ordered the crew members by radio: "Attention to all members of the Wind and Thunder Turboprop Engine Test Crew, the command center agrees to your request." After starting, please pay close attention to the engine data and changes in flight status, and contact the ground command center immediately if there is any abnormality! Please don't deal with any unusual situations on your own! Please answer when you receive it! ”

Soon the captain's voice came back from the radio: "Eagle understands! "The test aircraft of the Wind Thunder engine this time has a code name, which is called the Falcon Eagle.

With the start of the Wind and Thunder turboprop engine, the power of the Falcon test aircraft suddenly increased a lot, and the speed of the aircraft also increased suddenly. From 250 km/h, it was soon increased to 450 km/h, which has greatly exceeded the maximum allowable speed of the M30 transport aircraft, but this is a test aircraft, which is intended to test whether the turboprop engine works properly in the range of 400 to 800 km/h, and to obtain data within its envelope range. Therefore, the speed of the aircraft continues to increase, but because it is the first flight, and it is difficult to say whether the body of the M30 transport aircraft can withstand the load of high-speed flight, the maximum flight speed this time is controlled within the range of 550 kilometers.

The captain's voice came from the ground command center again: "Report to the command center." The Wind Thunder turboprop engine was successfully started and is running normally, now flying at an altitude of 3,000 meters, flying at a speed of 460 kilometers per hour, and the data of the engine and the aircraft are normal! ”

Xiao Weiguo also shouted to the crew through the radio: "Eagle attention, the adjustment of flight speed and engine power, 550 kilometers per hour is the limit, and it must not be exceeded!" ”

Soon. The Falcon test aircraft in the air, under the strong pull of the wind and thunder turboprop engine. Just half of the power output allowed the aircraft to reach a speed of 550 kilometers, of course, two piston engines with more than 500 horsepower were also working, but the power of each engine was adjusted to 300 horsepower, so that the power of the whole aircraft also reached nearly 1900 horsepower! In this way, only one thunder turboprop engine is needed. It can make a 7-ton transport aircraft easily reach a flight speed of more than 550 kilometers! If you give full play to the maximum power, even 600 kilometers per hour is not a problem.

However, it is not possible to turn off the piston engine and use all the power of the turboprop engine. After all, this is the first test flight, and safety is all about safety. Wait until after several test flights and obtain certain test data. It is possible to carry out a test flight with full turboprop power. Of course, the power of the piston engine is still used during takeoff.

When the speed of the aircraft reached the maximum allowable speed of 550 kilometers per hour, the crew adjusted the throttle of the wind and thunder turboprop engine a little, if it has been flying at this speed, it is still very challenging for such a test aircraft, after all, the strength of the fuselage structure has not been improved, but the speed has increased a lot, and such a flight is very dangerous. So the maximum speed of 550 km/h was maintained for only three minutes before dropping to a speed of 450 km/h, although in this way, the plane has already broken the current propeller speed record!

This first flight was indeed too successful! During the whole flight, the performance of the Wind Thunder turboprop engine can be said to be very good, it runs unusually smoothly, there is no failure such as air shutdown or engine overheating, and the Eagle test aircraft can be said to have been modified very successfully! Not only has it withstood the test of gaining more than a ton of weight and flying at a speed of more than 200 kilometers per hour, but it has not happened at all!

After nearly an hour of flight, the Falcon test plane tested a high-speed flight at an altitude of 6,000 meters and a cruise flight of 450 kilometers, and finally completed the test flight of its first flight. The captain then radioed a request to the command center to return home.

Xiao Weiguo's heart has only fallen a little, and now the first flight can be said to have succeeded most of the time, and in the end, it depends on whether the test plane can land normally. You must know that the aircraft has been modified, the aerodynamic shape has changed, and whether it can be carried out smoothly during the landing process, it is still uncertain, everything depends on the crew's skills and luck!

Xiao Weiguo said to the Falcon crew via radio: "You can return home, pay attention to turn off the turboprop engine, and control the flight attitude of landing!" ”

Xiao Weiguo's reminder is also just in case, of course, the crew members are also very careful, this is related to their life safety!

It didn't take long for Xiao Weiguo from the ground command center to see that in the sky at the end of the airport runway, the Eagle test plane was back! At this time, everyone's hearts hung again, and the most critical landing was about to be presented in front of everyone. After passing this hurdle, it can be said that the first flight of the Wind Thunder turboprop engine was a success! (To be continued.) )