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Two days later, the Ministry of Railways issued a rough technical standard for gas turbine locomotives, which was exactly the same as what Li Yuanling had described, and only then did Ervin Robertson believe that the gas turbine room had a deep impact on the procurement of gas turbine locomotives by the Ministry of Railways.

The negotiation between the two sides began to speed up, and Li Yuanling also formally proposed to introduce Rolls-Royce's gem vortex engine to participate in the power core competition of the Ministry of Railways' gas turbine locomotive.

The "Jewel" turboshaft motor is a twin-rotor turboshaft motor developed by the former Bristol Siddeley Company in Britain, and the "Jewel" turboshaft motor was developed in response to the needs of the "Bobcat" medium-sized multi-purpose military helicopter.

When the "Lynx" helicopter was first designed, there were originally ready-made American turbine engines available, but in order to protect their own interests, the British and French governments decided that Bristol Siddeley would develop a new engine and take care of most of the work, with a small part of the French company Turbomeca undertaking 25 percent of the workload.

Development of the Jewel scroll shaft motor began in January 1968, deliveries of the Jewel 41 military production engine began in January 1976, and two years later, in December 1979, the Jewel 41 civilian scrollshaft motor received the British Civil Aviation Authority (BCAA) airworthiness certificate.

After Rolls-Royce merged Bristol Siddeley, the jewel scroll shaft motor has developed into a series of scroll shaft motors across the military and civilian fields, with a power range of 6ook and 9ook and seven or eight modifications.

Not only did Britain and France equip more than 9oo gemstone series motives in the military and civilian fields, but the gemstone series was also exported to Italy under the code name R1oo4. Powertrain for the Italian A129 helicopter.

Liang Yuan chose the gem series among the many turboshaft motors, although it is related to the Spey motive from Rolls-Roy, but it is also very related to the gem is a very excellent vortex shaft motive, and the gem vortex motive is one of the few aviation equipment that is close to the Soviet-style motive among the motives developed in the West.

The gem vortex shaft motor is unusually pungent and durable in practical applications, and can withstand all kinds of violent operations of the driver, the overload of the motor can even reach 1.5 times of the rated power, and the whole machine is also exceptionally good in terms of maintainability and reliability, and the overhaul of the ordinary Cheng dù only takes 1o minutes, and the overall disassembly of the motor takes less than a day to overhaul. The high temperature parts of the motor have a rebuild life of 15oo hours. The refurbishment life of medium and low temperature components has exceeded 3ooo hours.

At the beginning of the development of the gem motive Bristol Siddeley company used a large number of mature technology, although the technical level of the gem is not very high, far behind the United States Black Hawk helicopter used T7OOGE7O1 scroll shaft motor, but a large number of mature technology brought by the cost advantage. So that the jewel vortex shaft motor was sold for 2o3o dollars. Only about one-third of the cost of the T7OOGE7O1 scroll shaft motor. It can be regarded as a rare cabbage price motive in Western equipment.

For Liang Yuan, the technical difficulty is slightly higher than that of Spey Airlines, the price is low, and the performance is stable and reliable. The turboshaft motor that can be digested in a short period of time is simply ideal, and as for the limited potential of the turboshaft motor of the gem series in the future, Liang Yuan did not consider it at all.

It was easier to copy the simple ones when the toddlers in the gas turbine room began to copy the homework, and it took nearly 3o years for the republic in the previous life to understand the T7ooge7O1 vortex shaft motor used by the American Black Hawk helicopter, and this kind of big pit beam would jump into it.

When Li Yuanling proposed the introduction of the jewel vortex motive, in the face of Li Yuanling's confidence, Erwin Robertson was more than suspicious, because the Qinghai-Tibet Railway is too high altitude, sparsely populated, in case of accidents rescue or self-rescue is quite difficult, so in order to ensure safety, according to the Ministry of Railways' plan, the traction head in and out of Tibet must at least be reconnected with two planes.

Therefore, after the completion of the Qinghai-Tibet Railway, at least 2oo traction locomotives are needed to meet the passenger and freight needs in the early stage, according to the power of the gem vortex axle motor 8oo kilowatts, each traction locomotive needs to be installed with at least four units, which means that at least 8oo gem vortex shaft motors are needed without calculating spare parts.

The huge order of 8oo turboshaft motors is enough to make several major power manufacturers willingly develop a new turboshaft motor in response to the requirements of the Ministry of Railways.

Li Yuanling did not hide it, and directly pointed out the fact that Hong Kong Yuanjia, the parent company of the gas turbine room, was the financier behind the gas turbine locomotive project of the Ministry of Railways, and Ervin Robertson thoroughly singled out, and issued a certificate that the two companies belonged to the affiliation, and emphasized that it was because of the strong recommendation of his teacher that the gas turbine room chose Rolls-Royce as a partner.

After contacting Erwin Robertson, who had caused and acted as a cause, he realized that the Hong Kong company named Yuanjia planned to use the gas turbine locomotive to squeeze into and even lead the upgrading of China's railway system equipment.

In the face of this sudden huge order, Ervin Robertson fell into an irrepressible ecstasy, although Li Yuanling emphasized the fact that there is still a need for bidding in the future, but as a subsidiary of the financier's own owner, it is possible to lose to other companies, and what Rolls needs to do now is to meet the requirements of this little-known room as much as possible under the premise of ensuring Rolls-Ro's own interests.

In the face of huge interests, the progress of negotiations between the gas turbine room and Rolls-Royce began to increase abruptly.

On October 15, Hainan Lingshui Airport, light breeze and sunny.

Still in the position of more than a month ago, Ning Lei and Geng Qinghua stood outside the bunker with binoculars, looking at the A7 attack planes that were taking off one by one at Lingshui Airport in the distance.

"Ning Lei, yes, it looks like you've really done it. Geng Qinghua stared at an A7 attack plane that was climbing with satisfaction.

"Chief, when are we going to go?" Ning Lei stood with his back straight behind Geng Qinghua's side.

"Light can go up to the sky but it can't be done, and when it will be dispatched depends on how well they perform in the exercise. Geng Qinghua waved his hand and said.

After more than a month of high-intensity training, the pilots of the A7 attack planes of the Republic Navy and Air Force finally obtained the qualifications to fly alone; after conducting a number of exercises on individual planes and in formations, Ning Lei sent a report to the General Staff and proposed that the A7 attack plane formation already had a preliminary ground attack capability.

Geng Qinghua, who received the news, flew to Hainan Lingshui Airport on a special plane the next day to test the ground attack level of the pilots of the Republic's own A7 attack planes.

On the simulated exercise site representing Nanzi Island of the Twin Reefs, 12 permanent fortifications made of reinforced concrete have been built in a messy manner, and inside the bunker outside the exercise site, a staff member is adjusting a radio station to communicate with the airport tower.

A few moments later, all 12 A7 attack planes took off and left Lingshui Airport and assembled in the scheduled airspace.

"Chief, the fleet has been assembled, please instruct. A combat staff officer ran out of cover and saluted.

"Okay, carry out the next part of the exercise according to the predetermined plan. Geng Qinghua waved his hand decisively, turned around and walked towards the inside of the bunker.