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Wright J-3 / J-4 Whirwind

 

Wright-J4B
Wright J-4B


By the time Lawrance merged with Wright, it had already developed the J-2, a more powerful version of the J-1 with slightly enlarged bore and displacement. However, Lawrance decided the J-1 was large enough, and the J-2 never went into production; only two examples were built.

Over the next two years, Wright gradually refined the J-1 engine, introducing the J-3, J-4, J-4A, and J-4B. The changes improved the engine's reliability, cooling, and fuel consumption, but the basic design, dimensions, and performance were unaltered.

The J-4 was the first engine to bear the Whirlwind name; previous engines had no name, only a designation.

 

 

 

 

 

 


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