After Wei Minsheng's transformation, this hot air balloon, oh, should be called a hot helium balloon, if only one person is taken, you only need to simply heat the air in the hot air balloon airbag to lift off, saving a lot of fuel, plus additional carrying capacity and changes in the shape of the airbag, there are more choices for fuel. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Since the original flame vent of the hot air balloon is enlarged, and after being propped up with aluminum alloy, a relatively stable space is formed, so it is not necessary to use the way of flame spraying.

It is entirely possible to install a stove on the basket with an air inlet on the basket and a pipe to connect it to the air inlet of the stove.

The fuel for the stove is charcoal, after all, the dry charcoal itself is lighter, and the wood tar is removed during the dry distillation process, so there is almost no smoke and less residue after combustion.

The most important thing is that this charcoal has no technical content, and it can be fired by building a kiln at will, and the remaining scraps of the wood processing plant in Huaxia Villa can be used, saving Wei Minsheng from worrying about this fuel.

The hot air from the fire grate is fed through a large pipe into the balloon's cladder opening, which acts as a source of hot air.

In order to reduce the weight of the stove, the stove is not designed with the usual insulation, but is designed with two furnaces, one large and one small, and the charcoal is burned in a small overhead furnace in the middle, without contact with the large furnace outside.

In this way, after the cold air from the outside enters the furnace through the air intake, it produces a high-temperature gas through the small furnace barrel in the middle, which is almost concentrated in the middle of the heating pipe several meters high due to the action of inertia during the ascent.

The gap between the two furnaces forms another annular medium-temperature inlet channel, and although the hot gas generated in this channel is not as hot as the gas produced in the middle small furnace, it has several essential functions.

The first is to form a thermal insulation layer to avoid the temperature of the outer cylinder of the furnace from being too high and prevent the personnel working on the platform from being burned.

The second is to avoid heat loss, although the gas temperature in this channel is not very high, only less than 100 degrees, but it is also far higher than the temperature of the outside gas, and it can also produce upward buoyancy, and it is better to send the air bag than to let it go.

Third, the medium-temperature gas and the high-temperature gas in the middle are fed into the airbag at the same time, which is like adding a thermal insulation layer to the high-temperature gas, which further reduces the heat loss of the high-temperature gas in the airbag pipeline.

Fourth, cold air can be used to cool down the outer cylinder and further reduce the temperature of the outer cylinder.

The specially designed stove has a temperature of only a few tens of degrees on the outer cylinder, so it can also provide some heat to the observers on the hanging basket, after all, the wind is strong in the air at a height of nearly 100 meters, and it is still a little cold after staying for a long time.

A damper is also designed on the cold air intake pipe, which can easily control the air intake volume, indirectly affect the size of charcoal burning in the furnace, and achieve the purpose of controlling the rise and fall of the hot helium balloon.

Although the hot helium balloon has been done and has achieved the design purpose of Wei Minsheng, if this thing is not pulled by a rope, it is easy to rise and easy to descend, but it will be troublesome to return to the place where it was raised.

Then the lookout will become a drifting platform, and it will go with the wind.

Therefore, Wei Minsheng used the hooks on the high platforms at the four corners of the farm to fix them with ropes to prevent the lookout platform carried by the hot helium balloon from flying around.

In this way, the length of the rope on the four high platforms can also control the lifting height of the hot helium balloon, and in special circumstances, when the people in the hanging basket cannot control the lifting of the balloon, the four high platforms can also be forced to pull the balloon down at the same time with the rope.

Another advantage of using four ropes to secure the hot helium balloon is that Li Yan can also turn the observatory into an aerial firepower platform in the event of war.

Whoever needs support near the high platform, only need to tighten the rope of that platform, and then pull this lookout platform to the vicinity of that high platform, where Li Yan can take out pebbles or canisters with gasoline through the shared space at a height of hundreds of meters and throw them into the intruder's ranks.

At a height of nearly 100 meters, throwing anything can kill people, not to mention hard pebbles or crockpots, and the crockpots filled with gasoline can not only kill people, once the splashed gasoline catches fire, it is really sticky and injured, and it will die next to it, and the canal outside the farm, which is only more than a foot deep, does not have enough space to hide, and it cannot extinguish the fire on the body.

Since the hot helium balloon has four ropes, it is best to land in the middle of the farm, and not too low, otherwise the ropes may be hung on top of the farm's mobile house.

Therefore, in the middle of the farm, sixteen mobile houses were used to build a four-story platform, and each floor of the mobile houses was fixed with bolts, and the height of the platform reached more than ten meters, which was much higher than the city towers in the general city.

The platform is covered with a layer of wood that acts as a platform for the helium balloon, so that the surrounding platforms and platforms are much higher than the rest of the farm, and the rope holding the basket is not affected by the other buildings in the farm.

When Wei Minsheng watched the hot helium balloon he designed and made himself rise from a distance, a flash of inspiration flashed in his mind: "Damn, isn't this a flying saucer?" It's even more like this if you're using a jet of flame as a powertrain. ”