[WWI] SPAD 13 Internal fitting

Diego Fernetti dfernet0 at rosario.gov.ar
Wed Apr 18 06:58:05 EDT 2007

> Were any allied aircraft that advanced

Perhaps the airplane structures were more conventional, generally speaking, 
but in the USA some manufacturers were starting to experiment with steel to 
make an airplane (and it flew, even if post 1918).
On the allied side, there was a great development in the design of engines, 
being the Hispano-Suiza one of the best "discoveries" that allied aircraft 
manufacturers made. Funny, it was an engine invented by a Swiss engineer and 
first produced in Spain, both neutral countries!
Which speaks a load about neutrality in wars.

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