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A Method for Reducing the Temperature of Exhaust Manifolds (1931)
NASA Technical Reports Server (NTRS) · leaf 13
N.A.C.A. Technical Note No.390 Fig. 3 Fig.3 Right side of Pratt and Whitney "Wasp" engine with air-inducting exhaust manifold.NASA Technical Reports Server (NTRS)
Internet Archive · NASA Technical Reports · Public domain (US government work). Free to use for anything.
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