The Concert for Bangladesh is seen as a highly successful and influential humanitarian aid project.
The Hirth HM 504 is a four-cylinder air-cooled inverted inline engine .. The 504 was a popular engine for light aircraft of the 1930s-1940s and it was used to power a number of Germany 's trainer aircraft of World War II .. The engine featured a cast magnesium alloy crankcase .. The Hitachi Hatsukaze Model 11 was a Japanese licensed version .. Hitachi Hatsukaze. Hitachi Hatsukaze