Set sail1992

Chapter 361 Domestic Target: State Farm!
Li Gexin frowned and said, "It's feasible, but our engine is a motorcycle engine, so it can't be compared with an aircraft engine, right?"

Even if they are both single-cylinder air-cooled gasoline engines, there are still many differences between motorcycle engines and aircraft engines. The biggest difference is durability: Take the engine of a Suzuki GS125 motorcycle as an example. The speed is 12000 rpm, and the red line speed is 10000 rpm, but for ordinary users, the actual daily use speed will basically not exceed 5000 rpm, and even when it reaches 5000 rpm, it is just the occasional acceleration and overtaking. In seconds, the speed is basically maintained below 4000 rpm, that is to say, basically only the first third of the speed is used.

But piston aeroengines are different. The throttle opening during takeoff and climb is between 95% and 100%, which is basically the degree of full throttle, and this process lasts for several minutes to ten minutes. After the level flight stage, the throttle opening of the engine is also above 65% to 70%. In analogy, it is equivalent to a GS125 whose full speed is above 8000 rpm.

Such a high speed naturally puts forward higher requirements on the strength, reliability and heat dissipation of the various parts of the engine. There are no other aero engines in China other than the 2010-star air-cooled engine, but the technical requirements are higher.

Of course, in addition to high technical requirements, it is also related to the market. There are basically no domestic aircraft using this type of piston aeroengine, and the market is almost zero. Since there is no market, who will spend money to research this stuff?If it is really necessary, two Lycoming or Continental engines will be enough.

Zhang Qihang nodded, he naturally understood what Li Gexin said: "I have considered this issue, and the HT150 in this state is really not good, but my idea is to work with Harbin Institute of Technology to carry out some strengthening and weight reduction designs on this engine. , such as using a stronger crankshaft, using lighter forged pistons and connecting rods...

If this still can’t meet the demand, we can graft an HT150 cylinder assembly on the basis of the HT150, and use two engines to form a 300CC displacement V2 engine. It will be enough at that time, and the power is not enough to make up the displacement. , although the engine is a bit heavier, the big deal is that the maximum take-off weight of the aircraft is increased and the maximum load is reduced, but I think this has little effect... At that time, the V2 engine can be modified and installed on our motorcycles. "

When Li Gexin heard this, Venus popped up in front of his eyes: Can you still play like this?What you said is simple, but do we have the technical ability to make such a fuss?

But when he thought that the HT150 engine was created by Zhang Qihang, Li Gexin had no objection: probably for Zhang Qihang, this is really not a problem, right?Then nodded: "Since the engine is fine, then I have no objection."

However, since the engine is not a problem, how big is the market for this drone?
This question was not only concerned by Li Gexin, but also by other comrades in the conference room. Everyone stretched their necks and ears to listen to Zhang Qihang's answer.

"As for the market, I am very optimistic," Zhang Qihang continued: "But the domestic market I am targeting is not our ordinary people. Although the household production contract has been implemented now, in our village as an example, the per capita land is divided into one mu. It’s not connected together, maybe three points at the east end of the village, half an acre at the west end of the village, piecemeal, there is no need for drones to spray pesticides at all, I guess the common people are reluctant, I am targeting those state-run farms.”

State Farm?

Yes, State Farm!
Zhang Qihang's words made everyone's eyes light up.

The question everyone was most worried about before was: the technical problem may not be big, but the question is whether there will be a market for this drone after it is produced?

But when Zhang Qihang said that, everyone immediately realized: Yes, why did I forget about the state farm?
Huaxia has a large number of state-run farms, especially in the three northeastern provinces and parts of Inner Mongolia adjacent to the three northeastern provinces. Almost all the farms there are large-scale state-run farms with mechanized operations, and in Xinjiang province in the northwest, the country even has a Construction Corps!

Ordinary people don't use drones to spray pesticides, but don't these state farms either?You can often see news similar to "XX Farm uses airplanes to spray pesticides" on TV.

Ok?
Do farms use airplanes for pesticide spraying?

Xie Haiqiang was taken aback, and asked Zhang Qihang: "Don't those state-owned farms use airplanes to spray pesticides? The efficiency of airplanes should be much higher than that of our little guy? Then why don't those farms use it?" Instead of using our remote-controlled small aircraft?"

"That's a good question." Zhang Qihang raised his thumb and said with a smile: "First of all, let me introduce to you the plane that sprays pesticides on farmland in our country. This plane is the Yun-5 transport plane. Carrying 5 kilograms of pesticides and spraying thousands of acres of farmland, the operation efficiency is extremely high, and the pesticide spraying operation on thousands of acres of farmland can be completed in one day. Then the problem comes, since those state-owned farms can use Y-800 aircraft to spray Pesticides, so why use our little planes?"

Yes, why?
Everyone immediately pricked up their ears, waiting for Zhang Qihang's answer.

Zhang Qihang said: "First of all, to use the Yun-5 transport aircraft to carry out pesticide spraying operations, you need to apply for routes and report to the aviation management department in advance. Even in the fastest case, you have to apply today and get approved tomorrow. In terms of immediacy lacking;

The second reason is that the Yun-5 transport aircraft is a fixed-wing aircraft. After spraying once, it needs to return to the airport a certain distance away from the farm to perform refueling, inspection and pesticide filling before returning to the airport again. Therefore, although the efficiency of a single operation of the Yun-5 transport aircraft is very high, the effort of tossing and checking back and forth greatly limits the overall operation efficiency, and it is doomed that the Yun-5 transport aircraft can complete up to four operations per day. [-] mu of farmland work area;
In addition to these two reasons, there is another thing that everyone thinks about which departments have the Yun-5 transport aircraft?If the farmland wants to perform a spraying operation, it has to ask the other party, and the fee is not cheap..."

Speaking of this, Zhang Qihang raised three fingers: "It is necessary to apply and report in advance, the fees are high, and the face is ugly. This is the current situation of manned aircraft spraying pesticides in China, and this is exactly what our drones do. opportunities and advantages."

(End of this chapter)