empiezo con los alemanes
Bf 109EF vs Yak-17 Eastern Front 1941-1942" Osprey Duel 65 p15
y sigo con mastondóticas construcciones en EEUU, fotos sacadas de este enlace https://www.theatlantic.com/photo/2018/ ... ls/560660/

Construction of the 40 foot by 80 foot wind tunnel at Ames Research Center in July of 1943. Construction began in late 1941, with the mammoth construction task sorely taxing the resources of the new center. Two and a half years later, in June of 1944, the full-scale tunnel went into operation

Construction view from inside the contraction framing of the 40 foot by 80 foot wind tunnel at Ames Research Center with a blimp flying in the background, in July of 1943

Six 40-foot-diameter fans stand in the Ames 40 foot by 80 foot wind tunnel, each powered by a 6,000-horsepower electric motor, capable of maintaining airflow up to 230 miles per hour. Photographed on June 9, 1944

16-foot high-speed tunnel fan blades ,1943