Based upon this new technical information, a general conference of the Army/Navy advisory group decided that a Japanese version of the German engine showed more potential than any of the jet or rocket developments then underway in Japan. Several companies were given the available information on the BMW 003A and instructed to develop their individual versions. The resulting projects were: Ne 130 by Ishi-kawajima-Shibaura Turbine, modified from the G.T.P.R., Ne 230 by Nakajima Aeroplane Co., Ltd., together with Hitachi, Ltd.. and the Ne 330 by Mitsubishi Heavy Industries, Ltd. In the meantime the Naval Air Technical Arsenal, KUGISHO, developed its own version, namely the Ne 20.
By using the fragmentary cross-section conceptual drawing of the BMW 003A, Navy designers laid out the axial flow compressor design for the Ne 20. This engine was roughly three-fourths the size of the 003, and considerable substitutions had to be made in materials. The combustion chamber remained like that of the BMW type, which was annular in design. In scaling down the BMW, the Ne 20 used the same size burners, but instead of sixteen, it used only twelve, thus eliminating additional experimentation by retaining the same flame length, airflow characteristics, etc.
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By using the fragmentary cross-section conceptual drawing of the BMW 003A, Navy designers laid out the axial flow compressor design for the Ne 20. This engine was roughly three-fourths the size of the 003, and considerable substitutions had to be made in materials. The combustion chamber remained like that of the BMW type, which was annular in design. In scaling down the BMW, the Ne 20 used the same size burners, but instead of sixteen, it used only twelve, thus eliminating additional experimentation by retaining the same flame length, airflow characteristics, etc.
Download (rapidshare.com)
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