MECHANICAL ENGINEERING HERITAGE NO.8
YANMAR Small Horizontal Diesel Engine, Model HB
The Yanmar small horizontal diesel engine, ‘Model HB’ is a diesel engine that was successfully designed for downsizing and commercialization for the first time in the world. Around 1930, among compact internal combustion engines, oil engines were at the height of their prosperity. Magokichi Yamaoka, the founder of Yanmar, was captivated by the superior energy efficiency and safety of a diesel engine he saw at an exhibition in Leipzig, Germany, and he made great efforts toward the development of compact diesel engines.
After overcoming various technical problems, he successfully commercialized the ‘Model HB’, which was without parallel in the world, in December 1933.
The downsized diesel engines were widely employed as power sources in various industrial fields, including agriculture, and contributed to mechanization and modernization not only in Japan, but also various countries around the world.
- Hours open:
- 10:00–18:00 (Entry closes at 17:00.)
- Admission fee:
- 600 yen for adults, 300 yen for junior/senior high schoolers. Free for elementary school children or younger (only Yamaoka Magokichi Memorial Room free).
- Days closed:
- Mondays (the following day if falling on a holiday)
- 6-50 Sanwamachi, Nagahama-shi, Shiga 526-0055
- 5 mins. on foot from Nagahama Sta., JR Hokuriku-Honsen