Crossword-Solution: POWERPLANT 10 letters, 13 clues 🏆 scrabble score: 17

This event was so important that it was the basis of the following editorial, published in the July 1931 issue of _Aviation_,[7] which summarizes so well the progress made by the diesel engine over a 3-year period and the hope held for its future: A RECORD CROSSES THE ATLANTIC--The Diesel engine took its first step toward acceptance as a powerplant for heavier-than-air craft when, in the summer of 1928, a diesel-powered machine first flew.

Mead (vice president and technical director, Pratt & Whitney Aircraft Company): Compared with the present Otto cycle engine, the Diesel powerplant weight, including fuel for a long-distance flight, would apparently be less.

Mullinnix (former chief of powerplant section, Navy Bureau of Aeronautics): The advantages of compression-ignition, including reduced fire hazard, more efficient cycle, elimination of electrical apparatus and hence of radio interference, elimination of carburetion problems, and other benefits less evident, would seem to outweigh the difficulties encountered in metering and injecting minute quantities of fuel at the proper instant.

Indeed, working motors of one-half this weight per horsepower [9 pounds per horsepower] have been constructed by several different builders." It is quite obvious that with their general knowledge and the experience they had acquired in designing and building a successful shop engine for their own use, they had no cause to doubt their ability to supply a suitable powerplant when the need arose.

Often they were of the complete powerplant unit, including radiator and water and fuel, with no clarification.