Industry-specific tariff code reference

List of the table of contents of this article:

• 1, Why was Zhi8 almost abolished in those years?
• 2, direct-8's Technical features
• 3, Straight-8 Why not mass-produced in China
• 4、How to adjust the ignition order of v8 distributor
• 5,Industry-specific tariff code reference How much power is the 8-cylinder engine?

Why was Zhi8 almost abolished in those years?

1. Straight-8 isThe imitation of the French SA321 "Super Hornet" helicopter, because the performance problems of the engine cannot be solved for a long time, so the equipment of the straight 8 has not been large. At present, Zhi-8F has only begun to develop again after switching to the PT6B-67A engine produced by Canada's Pratt & Whitney.

2. The reasons are relatively complex. First of all, China's direct-8 project to imitate the "super wasp" has been carried out for many years, but because some key parts cannot be localized, a large number of practical straight-8 models have not been produced for 20 years.

3. Because of the foreign exchange reform, you can check the 1994 foreign exchange reform. At that time, China adopted a linked exchange rate, that is, a fixed exchange rate determined by ourselves, hooked with the US dollar, and then remained unchanged. 1993=7619, 1994=6187.Because the domestic inflation was very strong in 994, the economy stagnated a lot.

4. The landing and water landing device of the straight-8 is composed of a landing gear, a tail support and an amphibious short-wing float. It can ensure the stability of the helicopter during landing, taxiing and stopping. The front landing gear can be turned and is equipped with a directional lock mechanism and an anti-oscillation device.

5. We can all create the same one again. Let's get back to the point. Zhiba is an imitation model, but the imitation at the national level is far inferior to that of Shenzhen. Most of the imitations at the national level are not as good as the prototype, and the cost is much higher than the prototype. Of course, the practicality is also lower than the prototype. This is not The reason for how to list the installation.

6. The main starting point of this improvement should be to reduce the probability of power loss caused by the No. 3 engine inhalation exhaust gas at the rear of the main reducer.Because the intake of the No. 3 engine of the straight-8 series is located behind the exhaust pipe of the front engine, there has always been a situation where the intake of exhaust gas affects the combustion efficiency of the engine, resulting in power loss.

technical characteristics of straight-8

1. In appearance, the main difference between straight-8 and straight-18 is the head. Straight-8 has a circular protruding head (used to install radar and other equipment); in addition, straight-18 will The bottom of the boat has been changed to a flat bottom, which can also be observed from the appearance.

2. The straight-8 helicopter has a large power reserve in the standard state, with good flight performance, long service life, flight safety, easy operation, convenient use and maintenance, and can take off and land landing on the water in an emergency. The Zhi-8 series helicopter still has shortcomings.

3. Straight-8 helicopter is a single-rotor multi-purpose helicopter with tail blade. It has a large power reserve under the standard state, good flight performance, long service life, flight safety, easy operation, convenient use and maintenance, and can take off and land on the water in an emergency. Zhi-8 has a variety of modifications, equipping the Chinese Air Force, Navy and Civil Aviation Departments.

4. The straight-8 helicopter is a single-rotor multi-purpose medium-sized helicopter with tail paddle. It has a large power reserve under the standard state. It has the characteristics of good flight performance, long service life, flight safety, easy operation, convenient use and maintenance, and can take off and land on the water in case of emergency 4.

5. rotor diameter: 190 meters, length: 205 meters, fuselage length: 27 meters, height: 66 meters engine: 3 1550 horsepower turbo shaft engines.

6. Restart the research and development work later. The first prototype of Zhi-8 was first tested on December 11, 1985, and the second prototype was tested in October 1987. In December 1989, the direct-8 of some imported parts was used to complete the technical appraisal. In August 1994, China's localization rate reached 86%, and Zhi-8 was standardized by the national design.

Why is the straight-8 not mass-produced in China

1. The reason is relatively complex. First of all, China's direct-8 project to imitate "Super Wasp" has been carried out for many years, but because some key components cannot be domestically produced After 20 years of delay, there is still no large-scale production of practical direct-8 models.

2. Mi 171 is still in the incoming material assembly stage, and the key technology has not been fully mastered.The key parts in the production of Zhiba cannot be domestically produced, and the French prototype has long been discontinued, and the imported parts are sky-high... Related reports: According to Russian News Network, China has begun to assemble Russian-made Mi-171 multi-purpose transport helicopters.

3. Because of the lack of technical reserves for China's helicopter research and development, in fact, helicopters and fighter jets are completely different things, and China has been blocking airspace for a long time, resulting in only military helicopters being able to fly, while civilian helicopters are blank, so China's helicopter research and development ability is very poor.

How to adjust the ignition sequence of the v8 distributor

1. Adjust the power-off contact gap of the distributor The size of the contact gap not only affects the strength of the spark, but also affects the opening and closing of the contact.If you adjust the contact gap after adjusting the ignition timing, even if it is a small change.

2. The adjustment method of Lechi distributor is that turning the distributor clockwise will make the ignition time later, and turning the distributor counterclockwise will make the ignition time earlier. The three-cylinder distributor has three distributors, and the part that can be adjusted is to turn the distributor to adjust the ignition speed.

3, or 2. There is a mark for timing. There should be a specific point on the crankshaft pulley, with the letter 1 or T. If it's not on the pulley, look at the engine flywheel to see if there are any of these marks.

4. The work order is: 1-5-4-8-6-3-7-2 and 1-5-4-2-6-3-7-8. I hope my answer will be helpful to you. I wish you a happy use of the car.

5, -6-2-5-8-3-7-4 or 1-5-4-8-6-3-7-2 V-type 8-cylinder engine. First, determine the order of the cylinder.

6. Hello: The ignition order of S500 is 6. I hope it can help you. I wish you a happy use of the car! [ For car questions, ask the car master. 4S store professional technician, 10 minutes to solve.

How powerful is the 8-cylinder engine?

R8 is the first supercar with a mid-engine in Audi's history. It is equipped with a 42-liter V8 FSI engine that can output a maximum power of 309 kilowatts and 420 horsepower at 7800 rpm, and can output a peak torque of 430 Nmio at 4500-6000 rpm. Di R8 can accelerate from stationary to 100 km/h in only 46 seconds.

The maximum output power of the V8 engine equipped with a displacement of 4L is 232kW (315hp). The maximum torque is 440N·m/3900rpm. It is equipped with a 6-speed automatic transmission. The fuel efficiency is 7km/L. It takes 0 seconds to accelerate from the stop state to 100km/h, and the maximum speed limit is 210km/h (190km/h in the United States).

BMW m8 adopts a 44-liter 8-cylinder twin-turbocharged engine, with a maximum horsepower of 626 horsepower, a maximum power of 460kw, and a maximum torque of 750N·m. The engine cylinders are arranged in a "V" shape, and each cylinder has four valves. The cylinder head and cylinder block are made of aluminum alloy. About BMW m 8 BMW m8 is a 2-door 4-seat hardtop produced by BMW M series.