In Plane View: Supermarine Spitfire Mk. VIIc
The flattening of the Spitfire's 12 exhaust pipes increased the speed of theescaping gas. This provided a small but significant increase in thrust, adding almost 5 miles per hour.
Image Number: WEB10808-2008
Credit: Image by Carolyn Russo, National Air and Space Museum, Smithsonian Institution
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