1990 年 38 巻 437 号 p. 328-331
Recently, expectation to linear-motor-cars grows up considerably in several countries. However its energy efficiency has scarecely been discussed, until two recent papers appeared in Asahi-shinbun. This paper improves the logic of comparison. According to the present author's opinion, the transportation-efficiency of the linear-motor-cars considered now to be used between Tokyo and Osaka is very close to that of airplanes.