Heavy rains fell at the end of July. Dayan is still stranded in Funing County.

For this reason, Lu Huiqing jumped to her feet anxiously. Because objectively speaking, in fact, no one wants to be "helped on the horse and given a ride" by the old leader, which will reduce Lu Huiqing's sense of existence and live in the shadow of the leader.

According to the laws of the Great Song Dynasty, the power of governance is of course in the hands of Lu Huiqing. But the reality is so strange, once the Great Demon King stays here, no one will listen to Lu Huiqing, and Lu Huiqing himself will not dare not listen, this is politics, and it is also the aura of a real leader.

Since the darkest moment came, military, political, people's morale, and so on, they all felt that the dark clouds were covering, and once again invited the idler's big demon king out of the mountain to command, and after winning the war against bandits, Wang Yan's prestige in the army, among the people, and among the border people has reached the peak, the high position of the altar.

Damn, it's the folk themselves fooling themselves now, and with the cooperation of various stall literature, the momentum of the big demon king is really not a joke.

The Great Demon King can't be driven away by law and technology. Wang Yan's sick note was fabricated by Lu Huiqing himself, and with that accurate style, there was no letter from the door of the Chinese book to deny it, which means that Wang Yan has no problem continuing to ink here.

It rained all the time, and a group of big-headed soldiers held umbrellas, and Wang Yan rushed to the machinery factory accompanied by Lu Huiqing and the main leaders of the county government.

In addition, the editor-in-chief of the "Industrial Development News" personally participated in the report, because today is a memorable day, without affecting the original steam engine production capacity, today is the day of the first test run of the second generation of new steam engine.

This plan was set in times of war, and public relations was carried out simultaneously.

In the assembly workshop, the design structure is completely different from the previous generation of steam engines, the size is much smaller, placed in the center of the test site, and the relevant technicians are surrounding the final inspection and finishing work.

Overall, this Dongdong is still stupid and coarse, but it has been greatly improved from the previous generation. Wang Yan and Lu Huiqing approached curiously to take a closer look, although they didn't know what the inside looked like, but the surface was much cleaner and fresher than at the beginning, and the matching and combination of many parts were much smoother. This represents better coordination of the entire unit.

This is the progress of craftsmanship.

Lao Luo, the chief designer of the second-generation machine, walked out, stretched out his hand and gently stroked the machine and said: "Xiao Wang, in addition to the progress of the process, there have been breakthroughs in materials during this time, so the appearance can not be seen all, but the inside, proud of the progress of the process, the update of materials, more integrated parts, greater strength and fatigue resistance." Therefore, according to the design requirements of the safe scheme, the horsepower of this machine will not increase much, but the service life will definitely make great progress. ”

"In the past, among the steam engines sold by our factory, the frequency of warranty and maintenance was relatively high, and it was more difficult. It can be expected that the quality of this generation of steam engine will be better after sale, and the after-sales maintenance pressure of our factory will be reduced, which can bring about a reduction in costs. Lao Luo Dad summed it up.

Wang Yan didn't speak, Er Ya and Little Bell bit their fingers and looked at the machine curiously.

Lu Huiqing responded on his behalf: "It's still not obscene enough, last night the county looked at the design process and technical indicators of the second-generation aircraft overnight, and it only reached the humble 47 horsepower, which is several percentage points worse than the design requirements of 50 horsepower." The manufacturing cost is reduced by 10% according to the design requirements, however, it is only about 5 percentage points lower than the previous generation of steam engines. Therefore, the county said that it will continue to pay attention to this matter, and everyone still needs to work hard. ”

couldn't just give Lao Lu a stage, so Wang Yan didn't speak, expressing his acquiescence to Lu Huiqing's rhetoric. But in fact, I am very happy in my heart, such a result is already very good, how can it be very standard to meet the planned indicators? It was really perfect, and Wang Yan should have suspected that they were hiding something.

It is said that in the constant temperature workshop, there are errors in everything measured with calipers, so how can the plan really meet the standard?

This is just the first machine, the beginning of a new architecture, there are a lot of things that can be mined, and in the follow-up various magic changes, it is expected to dig this machine to more than ninety or one hundred horsepower, if it really reaches one hundred horsepower, then railway transportation will really become a feasible solution.

Otherwise, the first generation of steam engines is too stupid and thick, and it is very large and heavy, and the thrust-to-weight ratio is too low. Even if the magic change is at the end, it is only about sixty horsepower. These 60 horsepower should be used in fixed situations, such as mine conveyor belts, large cranes in city walls, and pumping systems, which are barely okay, although the cost is high, but it can be stably output and release manpower.

But to be used for the locomotive is unqualified, after Ye Wushuang's R & D base repeated tests, even if the current train structure strength requirements are not high, you can consider in addition to the key parts of the wood instead, but the weight will also be very heavy, plus the stupid thick unit thrust-to-weight ratio is too low, so the first generation of steam engine can also run, but Ye Wushuang's test data is: can only take one carriage, pull about five tons of materials, run at a more economical speed of seven knots, and the car needs to follow a lot of people, if you encounter uneven terrain area, As long as the slope of the fourth degree is exceeded, someone needs to come down and participate in pushing the train.

It's just so cold, with a special five-ton load and a speed of about seven knots, do you still need to prepare a strong man to participate in the cart?

In addition to being too inefficient, this also adds too much difficulty to the site selection and design of the railway. These are all systems that pull each other.

But despite this, when the second-generation steam engine was not on the way, Ye Wushuang still followed up the development and testing of the train. There is only one reason, the existing transportation effect is not dependent on the river, otherwise even the speed of seven knots is faster than the ox cart, even if the load of five tons, it is more efficient than the traditional ox cart, and it can also release manpower and cattle and horses to a certain extent.

Looking at it now, although the design of the second-generation steam engine is a conservative scheme, as long as the magic change reaches the end, the volume and weight are reduced with a significant increase in horsepower, which is already a jump like a doubling of the thrust-to-weight ratio. It is possible to carry two carriages at a speed of 15 knots to lift the load. And the operating life of the unit will be longer.

Thinking of these big ducks makes my heart warm, it's not that it's not obscene enough, it's already very powerful. This is not yet calculated, just the progress brought about by the steam engine.

But in fact, it is not just the steam engine to improve, with the progress of technology and materials, the axle will become more efficient, with the increase of design experience, the weight of the car body will be reduced, the strength will increase, and as the core technology is slowly excavated, the conversion efficiency of the transmission system can also be greatly improved.

So these multiple bonuses are weighted and calculated, and now Wang Yan dares to let out wild words, and the transportation revolution will begin within three years. Fifteen knots is a very reasonable pace, much faster than a caravan that doesn't eat, drink, or sleep. If you climb up further, unless there is a breakthrough in the thermal efficiency of the machine, the gains outweigh the losses, and the steps are too big to pull the eggs.

According to the principle of aerodynamics, from fifteen knots onwards, a lot of power is consumed by the speed and climbs geometrically. If you reach a speed of several hundred knots, 99 percent of the power is used to overcome air resistance, and at most only 2 percent of the power is used to carry the load.

The so-called 60-horsepower machine with a five-ton load seems a bit awesome, and a minivan in later generations has more horsepower than this. So it's about exchanging speed for load, and getting the maximum load by reducing the speed.