The altitude of the aircraft is constantly decreasing, Zheng Zongming has to pay attention to the flight altitude on the one hand, control the speed on the other hand, and pay attention to the position of the runway at the same time, so that the flight direction of the aircraft is consistent with the runway. As a result, both hands are performing extremely subtle operations. The ground control tower is also constantly telling Zheng Zongming the relationship between the position of the plane and the runway.

500 meters, 400 meters, 300 meters......

As the altitude decreased, Zheng Zongming had completely retracted the throttle valve to the starting position, and in fact the power of the aircraft had been completely turned off at this time, but due to the huge inertia energy generated by landing, the plane still maintained a high speed of about 130 yards. However, the direction is basically aligned with the runway, the flaps of the main wing have been fully retracted, and the tail wing is tilted sideways in the opposite direction. Zheng Zongming's left hand had already left the throttle valve, holding the operating lever with both hands, trying his best to maintain the current flight state.

At this time, the plane could be seen landing from the sky very clearly on the ground and in the tower, and many people held their breath and waited for the plane to land.

Zheng Zongming was in the cockpit, and he also watched the scene on the ground getting bigger and bigger, and the front of the plane was also firmly aimed at the center line of the runway, so Zheng Zongming's heart was also slightly relieved, according to this state, there should not be much problem with landing, of course, the plane did not land on the ground, there were variables, and Zheng Zongming did not dare to relax.

At this moment, Zheng Zongming only felt that the plane shook suddenly, and it seemed to have encountered a huge impact, although he was wearing a seat belt, Zheng Zongming still violently bumped several times, and the body also made a "rattling" sound. Zheng Zongming knew that the wheel had hit the ground, but fortunately, his hand was still firmly grasping the operating lever, and the direction of the plane had not changed, so Zheng Zongming's heart was also more than half steady, and he immediately pulled the rowing lever.

At this time, all three wheels of the plane had landed, but the speed of the plane was still about 120 yards, and it was not possible to stop immediately. But after sliding on the track for hundreds of meters, the speed became slower and slower, and finally stopped at 800 meters. The crowd erupted in thunderous cheers again, celebrating the success of the test flight.

Liu Guangqing finally breathed a sigh of relief in the tower and took off the hat on his head, only to find that his forehead and palms were full of sweat, but the test flight was finally successful, which also means that the East China government took the first step to fly into the sky, and he not only witnessed this historical moment, but also will be recorded in this glorious history.

However, Liu Guangqing was calmer in the end, and after calming down his heart, he immediately called the Military Commission to report the news of the successful test flight. As soon as Zheng Zongming came out of the cab, he was surrounded by the crowd, and people sent flowers that had been prepared long ago, and reporters who came to interview him took pictures, and Zheng Zongming also cooperated very well to pose a few cool POSS.

As a matter of fact, the news of the test flight of the aircraft has also caused some discussion, and some people believe that the aircraft is a strategic weapon and should be kept secret, so that other countries will not know about the scientific and technological development of the East China Government; but there are also some people who oppose it, because the people of this era have not yet generally realized the tremendous strategic value of the aircraft, and they already have a precedent for the successful test flight of the Wright brothers, which can greatly hedge off the sensation of the successful test flight of the East China Government, and it is also a kind of deterrent to properly publicize their own scientific and technological development, and we cannot always act with the mentality of a weak person。 However, some people have pointed out that although the Wright brothers have successfully tested the flight before, the East China government's prototype has thrown the Wright brothers more than 10 streets, so if it is too high-profile, it may arouse the vigilance of other countries and even leak the secrets of the traversers.

It should be said that these considerations are all justified, so after discussion, the Executive Yuan finally decided that if the test flight was successful, it could be reported, after all, this is an industrial achievement made by the East China government, and publicizing it to the public can boost the morale of the East China government; however, several restrictions have also been made: First, only the [New China News] is allowed to conduct exclusive reports and on-site interviews; second, it can only report the news of the successful test flight of the aircraft, and cannot report the details of the test flight or the situation of the aircraft. Third, they can publish photos of test pilots and staff, but they must not publish clear photos of the aircraft, so as to prevent other countries from copying them. In the end, two photos of the plane flying in the air were chosen, and only a general image could be seen, but the details of the plane could not be seen, so it could not be imitated.

After the test flight, the project team immediately conducted a comprehensive inspection of the aircraft, and Zheng Zongming, Wang Xinping, Liu Guangqing and other relevant personnel are also writing a summary report, and the flight trajectory tracked by the radar is entered into the computer for calculation, preparing for the next step of research and development. The returnees are also relieved to accept the course education arranged by the East China government, and look forward to starting to work in the East China government as soon as possible.

And at this time, the fleet responsible for reconnoitring Vladivostok finally returned to Qingdao. This reconnaissance mission took a total of 32 days, not only completed the reconnaissance mission on the line from Vladivostok to Shuangchengzi, and made friends with a local tribe, but also carried out a comprehensive survey of the west coast of Japan and the waters of the Tsushima Strait on the way to and fro, so it can be regarded as an overfulfilled task.

On 28 March, the flotilla composed of the Kunming and Huaihua ships sailed into Jiaozhou Bay, and at this time, the Kunming ship received an order from the Admiralty that the People's Army Navy was carrying out a submarine trial mission in the waters of Jiaozhou Bay, and asked the Kunming ship to participate in this mission, turn on the hull sonar on the bow of the ship, and monitor the submarine's whereabouts. On the bridge of the Kunming ship, I also saw the shadows of the three warships Sanya, Qingzhou, and Yizhou from a distance.

The manufacture of submarines is a key project established after the official establishment of Qingdao Shipyard, and the level is still above the Qingzhou-class protective cruisers, along with the battleships. Moreover, the submarine was completely built by the East China government, and German engineers and technicians were not involved, of course, Germany at this time did not have much experience in submarine manufacturing, and it actually did not help much.

However, due to the shortage of skilled workers, the development and manufacturing of submarines progressed very slowly at the beginning, and at first only a wooden-hulled submarine was built, and no power was installed, but was towed by surface vessels to go to sea for testing.

However, after the completion of the two self-built Qingzhou-class protective cruisers, a part of the experienced technical workers were dispatched to support the construction of the submarine, which greatly accelerated the development and manufacturing of submarines, and successively produced two small experimental submarines with a displacement of less than 300 tons, which was the second experimental submarine with a displacement of 275 tons, which could dive underwater for 4 hours, and also installed a * launch tube, which could carry two * , the performance has reached the actual combat standard, and a lot of data experience has been accumulated. Only then did the formal design and manufacture of practical submarines begin.

In fact, this is also the regular size of submarines before World War II, because submarines rely on the electric power of on-board batteries to drive underwater, but the battery technology of this era is still quite backward, and the submarine can sail underwater for a short time, in World War II, the famous German U-boat can sail underwater for no more than 2 days. Moreover, because the speed of the submarine underwater navigation is extreme, generally only 5-6 knots, and the fastest is not more than 10 knots, so when the submarine is sailing normally, it is sailing on the surface, and only when it enters the war zone, or when it finds an enemy ship and needs to hide its whereabouts through the enemy's controlled waters, will it take stealth.

The cigar type or elongated drop type is suitable for underwater navigation, but in this era, this type of boat type does not have much value, so the submarines of this era are basically boat type. And now the traversers can only obey the technological level of this era.

Although the traversers have not designed ship-type submarines, they are not bothered, because they can directly use the mature scheme in the old time and space, and this time the scheme used is still German, that is, the U-boat.

In fact, the U-boat is a general term, because in the First and Second World Wars, the number of the submarine used by Germany was composed of the initials and numbers of the German Untersee-boot (submarine), hence the name;

The model adopted by the East China government was the Type VII (Type 7) submarine, which was also the most built Type 1 submarine in Germany during World War II, and derived three improved models, resulting in a total of 694 submarines.

The designed submarine is 62 meters long, 5.5 meters wide, 4 meters draft, surface displacement of 520 tons, underwater displacement of 635 tons, equipped with a 75 mm caliber main gun, a 50 mm rapid-fire gun, 3 * launch tubes, two in the bow and one in the stern, carrying a total of 6 rounds*; the power is two diesel engines, two electric motors underwater, the maximum speed is expected to be 12 knots, the underwater speed is 6 knots, the maximum depth is 100 meters, and the underwater continuous navigation is 7 hours. The crew was 35 people, of which 4 were officers.

The new submarine was built in 1904 and underwent its first sea trial in December, but the East China government classified the development of the submarine as a top secret, after all, this is the real weapon, so not many people know, even if it is a crossing soldier, not everyone knows.

In January 1905, the submarine underwent its second sea trial, both of which were a complete success, with generally satisfactory performance, and today the submarine-launched* test will be carried out. At this time, the Kunming ship returned, because the bow hull sonar and electronic equipment of the Kunming ship are the most advanced among the warships, and it is the most suitable for monitoring submarine-launched, so the Central Military Commission urgently asked the Kunming ship to participate in today's test.