Engineer Rhodiola went on to introduce the design concept of this copycat missile.

Because this cruise missile does not have to make a large flight maneuver like an ordinary aircraft, the design thrust-to-weight ratio is about 0.25, that is, the maximum take-off weight of the missile is about 200 kilograms.

Of course, you can also choose foreign model commercial machines with a higher thrust-to-weight ratio and more expensive prices.

The engine uses aviation kerosene, and the fuel consumption is about 0.8 liters per minute when fully loaded, and after actual testing, the data of foreign model enthusiasts are directly adopted, and the maximum actual working time of the engine is about 1 hour. In this design, the fuel tank capacity in the body of the bomb is about 80 liters. The flight speed is 200 km / h.

This engine is produced in the United States or Denmark, the price is less than 3,000 US dollars, I heard that domestic manufacturers also want to produce, the price is expected to be half of the imported products.

Engine cost: 45,000 yuan.

Second: the shape of the missile body/aerodynamic shape because the missile is not an airplane, there is no need to consider too much maneuvering flight, the shape of the missile body is as simple as possible: the use of cylindrical projectile body + head fairing, the purpose is to maintain high structural strength in the case of the most economical materials, and at the same time conducive to the installation of internal equipment. The design has a diameter of 35 cm, a total length of 180 cm, and an internal volume of about 0.35 cubic meters.

The purpose of using a straight upper monoplane wing with ailerons is to simplify the design and manufacture and provide a relatively large lift-to-drag ratio. The purpose of using ailerons is to facilitate maneuvering and control, which is commonly used in making models and is more mature).

The design wingspan is 1.8 meters, the chord length is 0.5 meters, and the wing area is 0.725 square meters. The V-shaped composite tail structure is adopted, because this structure has a good foundation in the model aircraft, the control and control are more mature, and the stability is also better, so the use of two tails instead of the traditional three, both as the rudder, but also to control the attitude.

The benefits are twofold: simplifying the structure and avoiding the influence of the engine's airflow. The engine is symmetrically installed on both sides of the missile body, and the center is in a backward position, which has the advantage of not bothering to design the air intake tract and tail nozzle, and keeps the distance between the two engines as much as possible, which is conducive to the engine heat dissipation and avoids the interference of heat on the guidance and servo in the missile body.

The whole projectile body is made of aluminum alloy keel, buy aluminum alloy profiles, riveted structure. The skin is made of Plexiglap or carbon fiber, the latter being much more expensive but much lighter for the same strength.

The layout of the cylindrical missile body from front to rear is: airspeed tube, missile computer compartment, sensor compartment, elastic wing servo, throttle governor, fuel tank, warhead, tail servo.

Materials used include:

1: 6 model servos, two wings, one tail, unit price: 80 yuan, a total of 480 yuan 2: a V-shaped tail proportional distributor, unit price: 140 yuan.

3: Two throttle proportional governors, unit price: 100 yuan, total: 200 yuan.

4: Two oil pumps, using car wiper pumps, unit price: 20 yuan, a total of 40 yuan.

5: A number of aluminum alloy profiles, a number of skins, a number of hardware parts, various adhesives, sealants, paints, hardware parts, and a number of standard parts.

The cost of the projectile body is less than 5,000 yuan.

Three: guidance, control part.

In fact, the design of this part is the most interesting, the whole system includes hardware, software two parts, first talk about the hardware part.

The missile computer is responsible for two aspects of work, one is guidance, the other is control, using the design idea of a standard micro industrial computer.

Advantech 2601 motherboard, 5X86-133 CPU, 32M memory, 4 COM ports, 1 8-bit ISA socket, and even an integrated graphics card and sound card, the size is only equivalent to a 3-inch floppy disk, plus a 256M electronic disk, a D/A converter for controlling the servo, and the weight does not exceed 1 kg.

The total price is around 5,000 yuan.

The missile adopts a powerful joint guidance method of GPS + terrain + inertial guidance.

GPS: JJTech's OEM receiver board, 12 channels, RS-232 output NMEA-0183 format data, the size is equivalent to a PCMCIA card, the weight is about 50 grams, plus the antenna is 200 grams. The price in Chengdu is 600 yuan.

Terrain: Industrial miniature radio altimeter, vertical range of 300 meters, RS-232 output, including probe weight of about 300 grams. The price in Beijing is more than 2,000 yuan.

Inertia: industrial miniature gyroscope, with magnetic compass, RS-232 output, weight of about 200 grams, Beijing price of more than 1500 yuan.

All of the above equipment use 5V power supply, the total current is less than 30 amps including the servo, considering the total working time of 1 hour, using 28 1.25V/45, the lithium battery pack for the laptop computer is selected for power supply, and the cost can also be pressed below 50 yuan.

After listening to the introduction, Li Baoqiang was dumbfounded, this is simply a copycat cruise missile, and it is so cheap, he is very interested: "The final price? How much? ”

Bai Rhodiola said proudly: "If you don't calculate the research cost, the cost is 100,000 yuan, and if it is mass-produced, the cost can be further reduced." ”

"The cost of research and development must be taken into account, in this way, if it is sold to the outside world, the price will be increased by 200 percent, 30,000 yuan a piece, I think the market must be hot, this is only 50,000 US dollars, cheap and big, absolutely sought-after!"

Li Moyang rubbed his hands excitedly, and his brain was filled, the land of Africa, uh, no, the war-torn countries of the third world in the world, the orders are like a tide, counting the money and counting the cramps in your hands.

Rhodiola Bai Tian, Wang Xiaolong and several other key workers also became excited when they heard Li Moyang say this, who would have thought that the copycat cruise missiles that were concocted by such a few people would have such a good prospect, it was too disadvantageous.

Li Baoqiang thought for a while, and his eyes lit up: "Just do it!" You have done a good job in cost control, but you don't have to be too petty, everything is based on combat effectiveness as the ultimate goal, what we want is not a fun model aircraft, but a reliable weapon. Let's go and experiment with this cruise missile now. ”

Bai Rhodiola nodded in agreement: "Any weapon is successful after thousands of failures, and I can't guarantee that there will be no mistakes in the process of testing." ”

"It's okay, let's try it now, without a warhead, just when we're playing with a model airplane." Li Baoqiang smiled boldly.

Wang Xiaolong is a pity: "My kind of spike missile, there is no solid fuel, it can't be experimented, alas~~~"

"There will be bread, don't worry, produce it first, I want to find a way to do solid fuel, if it doesn't work, export it first, and it's better to get fuel when it comes abroad."

PS: Military enthusiasts can give it a try, I'm not responsible for being invited to tea