Not only is it good, this situation is simply too shocking, the bows and arrows used by the officers and soldiers in Zigui City to defend the city are only more than 100 meters at most, and from the distance just now, it is at least more than 300 meters, which is three times the distance.

With this golf stone cannon, on this mountain beam, the tree house guest house, the plaza and the artificial waterway under construction outside the mountain can be included in the range of this stone cannon.

After a long period of training for those archers, an archer who can shoot a pot of arrows in a row is basically unable to open the bow, but from the operation just now, everyone has no strength at all, and if this continues, even if the stone projectiles are fired all morning, there seems to be no pressure feeling.

The bow and arrow can also be blocked with armor, this pebble is much heavier than the bow and arrow, such a high speed, even through the armor can smash people half to death, it is really injured if you rub it, and you will die next to it.

With such a sharp weapon to protect the villa, if a row of such things were installed on this mountain beam, no amount of troops in the world would be enough to smash it.

Through this simple experiment, Wei Minsheng has determined that his idea is feasible, if all the parts of this stone cannon are replaced with steel and connected with bolts, it will be more convenient and more durable when assembling.

It is simply too simple to use steel pipes to make shelves, buy a car of racks and fasteners on a construction site, and make dozens or hundreds of shelves with leftover materials, the key is that these things are not controlled resources.

Bearings and various types of shock springs are easy to find at car dismantling companies and repair shops, and even new springs can be purchased online at will, so there is no shortage of them at all.

Only this pendulum is not ready-made, but it is also very simple, now temporarily make a few wood, and then let Liu Mengling and them use seamless steel pipes with a diameter of 20, 30, 40 cm to order a batch according to their own drawings.

The pendulum made of steel pipes is welded with a thick steel plate at one end, and a cover that can be opened and closed at the other end, which is sealed with a screw.

When you need to increase the weight, you can fill the steel pipe with earth and stones, and when you need to transfer it, you can empty the soil and stones in the steel pipe to reduce the weight.

Different weights can use stone projectiles of different qualities, as well as cover different strike distances. A pendulum alone, in the real world, no one knows what it is for.

Wei Minsheng looked at the first stone cannon again, and felt as if he still owed something? After observing for a long time, it turned out that if the pendulum wants to get a larger swing arc and obtain greater kinetic energy, it is necessary to use manpower to repeatedly do work on the pendulum, and the time is wasted more, can it be improved again?

Sitting next to the stone cannon, looking at the pendulum swaying back and forth on the shelf, Wei Minsheng suddenly remembered that the manpower generator he had asked Liu Mengling and them to process before was similar to the structure of this stone cannon, except that one was a generator and the other was a pendulum. Can you also make it look like that, change the one-way gear into a lock pin, fix a large disc in the middle of the steel pipe that can be rotated, and fix an iron rod on top of the disk?

In this way, the pendulum is fixed next to this disc, and when the steel pipe drives the disc to rotate, the iron rod on the disc will block the swing arm and raise the pendulum forward.

When the center of gravity of the pendulum turns over the top of the steel pipe, under the action of gravity, the pendulum falls freely, and after hitting the pebbles below, the remaining energy makes it oscillate back and forth under the steel pipe.

As long as the steel pipe can keep rotating, when the iron rod on the disc blocks the swing arm again, it will repeat the action of the pendulum hitting the flying stone.

If the two sides of the disc are staggered and set up with a lock pin, you can control the left and right pendulums at the same time, and when one pendulum falls, the other pendulum is raised again, which is equivalent to a double-barreled cannon, which greatly reduces the firing time of the stone projectile.

Following this line of thought, why not install a few more pendulums on the shelf, if the manpower can't turn the steel pipe, install gears on the steel pipe, and use an electric motor acceleration and reducer to control the rotation of the steel pipe.

In this way, only one person needs to control the motor switch, and the others only need to place pebbles on the wooden trough, and one stone cannon becomes a multi-barreled cannon, which can almost achieve the effect of continuous firing.

If you increase the distance between each set of pendulums, set a gap on the edge of each wooden trough, and connect a PVC pipe out, you can stand behind the stone cannon and place a round pebble or concrete prefabricated stone projectile in the wooden trough, and two or three people can operate one of these golf stone cannons after proficiency.

If you set up another mechanism on the gap that can be opened and closed, when the pendulum is raised upwards and is about to pass the apex, open the mechanism, and a stone bullet in the PVC pipe rolls into the wooden groove; When the pendulum falls, the mechanism falls, blocking the stone bullets behind it, isn't that like a magazine? It's fully automatic.

In order to increase the flexibility of the stone cannon, the wooden trough can also be made to rotate around the pendulum to control the angle at which the pebbles fly out, so that it can only hit far away but not close, and almost the entire range of the fire range is under the control of the stone cannon.

If a base is added to this stone cannon that can rotate freely, it will be a firepower platform capable of controlling a radius of 300 meters.

Since there is no heat, deformation and wear of the barrel of this stone cannon, as long as the stone bullet can keep up, it is not impossible to reach one stone bullet per second.

With such a high firing frequency, it is simply the best weapon to deal with dense crowds, and from the point of view of the target of the attack, this stone projectile will not be used much, about a catty is enough. It can be imagined that this pound of pebbles flying from 300 meters away is not something that ordinary people can bear.

If you make some miniaturized pendulums, add a base that can rotate 360 degrees to the shelf, install it on a general van, and then load the cobblestones of the half carriage, it will be a mobile attack platform.

Add some steel plates in front of the truck, which can ram the enemy's various siege equipment and various military formations, and the distance of two or three hundred meters to the left and right and the rear is the fire coverage of this golf machine gun.

Due to the use of pure energy conversion methods, there are no ammunition restrictions for thermal weapons, so this "shell" is also from a wide range of sources, as long as there are rivers, where there is a lack of pebbles. And these pebbles can be reused, so there is almost no chance of running out of ammunition.

Thinking of the good prospects of this machine gun, Wei Minsheng greatly increased the number of small-diameter pendulums, and increased the ordering and procurement of gears and reducers and other accessories.

When the time comes, there will be enough machine guns, and on both sides of the Yangtze River outside the city, several high platforms will be built with concrete at intervals of two to three hundred meters, and a machine gun will be installed on each high platform. A few strong lights are installed around the high platform, and no matter whether it is day or night, it can completely control this section of the Yangtze River.

Some infrared detectors can also be installed on trees upstream and downstream of the waterway, which, together with wireless video surveillance, form an early warning system.

Hum! When the time comes, no matter what the ships of that country want to pass through here, they will have to ask us if they agree.