because copying is always easier and faster than pioneering
Nope retrofit is more difficult than building brand new because you are hampered by existing structure and missing drawing, material spec, component spec. It just like big jigsaw puzzle. It took the chinese 10 years to figure it out. They might have Russian engineer help along the way But the majority of the work is done by themselves. Most of RE take about the same time
RE is not as easy as people think case in point China recover US torpedo Mk 46 and reverse engineer as Yu 7 It took them 12 years to do it! But without basic engineering and dogged determination nothing will be done. India has all the help yet she has not master jet engine production.
Yu-7 (鱼-7) torpedo is the Chinese development of the US
incorporating technologies of the
torpedo. Many domestic Chinese sources have considered Yu-7 torpedo as the Chinese equivalent of US
.
Development |
According to official information released by the Chinese government, several US had been recovered by Chinese fishermen in the 1970s and 1980s, with the most advanced version the recovered in October, 1978 from South China Sea. Decision was given to reverse engineer the American torpedo under the name “Project 109” to produce the badly needed
light torpedo for the Chinese military. 705th Institute (also called Xi'an Precision Machinery Research Institute, 西安精密机械研究所) and Northwestern Polytechnical University were tasked with being the research team, while the No. 872 Factory and No. 874 Factory were assigned as the production facility. Full scale development started in 1984, with over 90 enterprises in the country involved in assisting the four major enterprises to develop the torpedo. 705th Institute (also known as Xi'an Precision Machinery Research Institute, 西安精密机械研究所) was responsible for the shallow water control systems of the torpedo and Northwestern Polytechnical University was responsible for the deep water control systems of the torpedo.
The Yu-7 torpedo is composed of over 5,000 parts and 4,500 instruments, while it had over 80,000 blueprints and its technical documents totaled over 100,000 pages. The first two prototype torpedoes were assembled in No. 874 Factory in December 1984 and were tested in the 750 Testing Range (750试验场) in Kunming in December 1985. By 1989 the Yu-7 torpedo had success