@eofpi.bsky.social

@eofpi.bsky.social

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A diagram from a 1964 report labeled "figure 2 - evolution of a tip driven cruise fan from a tip turbine lift fan" showing exhaust from a turbojet engine being used to drive the tips of a either a vertical lift fan or a forward-facing cruise fan.
Comparison of fixed wing and folding wing variants of the Grumman F4F wildcat fighter. The folding wing variant allows fitting almost three fighters into the wingspan of the fixed wing variant.