With this test result as a basis, on the fuse made by everyone's joint efforts, Yuan Fang added a precise mark, for example, if it burns one centimeter per second, the fuse of ten centimeters can burn for ten seconds and then detonate the bomb, then, a bomb dropped at an altitude of one thousand meters, if the bomb lands in ten seconds, it will take ten centimeters of fuse, of course, this is a hypothesis, a longer fuse will be needed in actual combat, after all, after ignition, you also need to adjust the direction of the bomb and other preparations, These also take time and consume the fuse, but with this marking, the bomber will have a clear reference to wait for the fuse to burn to the standard length before dropping the bomb, which will reduce the error and allow the dropped bomb to detonate within the strike range.

According to the weight of the bomb and the time of falling, Yuan Fang even accurate the scale to ten meters, that is to say, as long as the bomb thrower calculates the flight altitude and the altitude of the ground at that time, and subtracts the two to obtain the real distance between the airship and the ground, and determines the corresponding scale on the fuse, the explosion time after the bomb lands can be effectively controlled. For example, the flight altitude is 800 meters, the altitude of the ground is 200 meters, and the distance between the airship and the ground is 600 meters.

After teaching the female soldiers to make the fuse, Yuan Fang once again became the shopkeeper and hid in the room alone and began to study other things.

Artillery, has been basically successful, it stands to reason that it will take a period of time to test, to determine that it is absolutely safe and then equipped, but the time is not enough, and Yuan Fang also has enough confidence in the artillery he made, and has strict specifications for the amount of gunpowder filled when using, as long as he does not come to death by himself, under normal circumstances, there will be no fatal accident such as exploding, so Yuan Fang decided to start air combat training, that is, to equip artillery into fighters, and conduct in-flight actual combat exercises.

Such an exercise is very dangerous, after all, it is the first time, and it is a new type of fighter, no one knows what kind of impact the recoil of the artillery will have on the fighter, and it is very likely that an accident will lead to the tragedy of the crash, so this time it is still voluntary, whether it is the pilot or the artillery. What Yuan Fang didn't expect was that no one left because of the danger, and they all chose to stay, and Ding Bu strongly demanded the first test flight.

In the afternoon of this day, Yuan Fang put down what he was doing and took Sang Rou and the others to the airport on the island, Ding Bu, who was dressed in a flight suit, was ready, and the mechanic who had been working with him was doing the last inspection before takeoff, in the fire cabin, the two guns had been fixed on the deck, and the artillery volunteers did the final debugging to check whether the gunpowder, shells and fuses were firmly fixed.

Yuan Fang patted Ding Bu on the shoulder and instructed: "You must be careful, wait for the fighter to fly more than two thousand meters before starting the fire test." ”

There is also a reason why Yuan Fang asked for this, two thousand meters, once the airship can not withstand the recoil of the artillery and the fuselage is damaged, this altitude will have enough reaction time for everyone to parachute and escape, if it is too close to the ground, it is difficult to say.

Ding Buli saluted, put on the sunglasses that Yuan Fang had given him before, and strode onto the fighter jet under the gaze of everyone.

Yuan Fang was still a little uneasy, and explained to the four artillerymen in the fire cabin: "Wait a minute, there will be an airship dragging the target around you, you must pay attention to aiming at the target, don't hit our airship, and also, you yourself also pay attention to safety, once you encounter danger, jump immediately and parachute, understand?" ”

Four of the finest artillery volunteers answered the call. After closing the hatch, Yuan Fang stepped aside, watching Ding Bu drive the fighter into the air slowly, and Hongyi couldn't wait to say, "Brother, let's take off quickly, otherwise we will miss it." After speaking, he pulled Yuan Fang and ran to the airship next to him.

Yuan Fang smiled bitterly and got on the airship with the red clothes, Sang Rou and the others followed closely, Situ Muran and the adjutant had been waiting for a long time, and he would not let go of this kind of excitement.

The airship lifted off, not only Yuan Fang's airship, but also other pilots and artillerymen took off in the airship to follow in order to observe and learn at close range, in addition, the ten airships responsible for towing the target and the small boat responsible for airspace safety. Dozens of airships took off, and the momentum was quite huge, and the soldiers who remained on the ground looked up at the sky, envious one by one.

After flying more than ten miles west away from the long roundabout, Yuan Fang gave the order for the exercise to begin, and the fighter piloted by Ding Bu slowed down, and the ten target airships dispersed, flying to a higher position in the three directions in front of Ding Bu, to the left, and to the right, and then opened the tail hatch and threw out the target pulled by a rope.

The so-called target is actually a big pocket, the pocket expands after a ride, the size is about the same as an ordinary boat, for safety, or Yuan Fang really does not trust the accuracy of the artillery, deliberately lengthened the towing rope to 500 meters.

Everything was ready, the exercise began, and with the flagship's order, the target airship began to fly at full speed according to the established route, first, the airship in front moved sideways, and Ding Bu piloted the fighter plane to catch up at a faster speed, slowly reducing its speed when the two sides were about three kilometers apart, and maintaining the same speed and distance as the airship in front.

Ding Bu tried his best to aim the nose at the target, in the fire cabin, the front baffle was pulled apart, strong wind poured in, the airship shook a little, Ding Bu controlled the fighter to keep it steady, and ordered loudly: "Aim, prepare to shoot." ”

In the time of a breath, the sound of preparation came from the fire capsule below, and Ding Bu kept course and gave the order to shoot.

Two loud noises came from the fire compartment in succession, and the fuselage shook violently, but Ding Bu, who had been prepared, was still startled, and hurriedly manipulated the fighter to move slightly left and right to unload the reaction force of the artillery.

Looking at the target in the distance, the two shells flew in a straight line for a period of time and then changed to a parabolic operation, and the artilleryman's ability to predict was not bad, but the accuracy was a little worse, and one shot began to fall before it reached the target target, and the other shot had a higher angle and crossed the target.

The main purpose of this exercise is actually to test whether the fighter can withstand the recoil of the artillery, and the hit rate of the artillery is not something that can be improved in a day or two, but also needs to be practiced day and night.