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or lift jets but ruled out lift jets. Problems associated with lift engines include high fuel consumption, extra weight (which is simply dead weight when the engines are not needed for lift), and taking up fuselage volume that could be used for fuel or other systems. It was decided that
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variable-geometry wings provided comparable advantages in take-off performance without as many penalties and the
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capability to combat aircraft. The Soviet Union did concurrent testing of versions of combat aircraft using
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An alternative to the lift jet for vertical thrust is the lift fan used on the STOVL
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An operational military aircraft which used lift engines was the Soviet
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An early experimental program using lift engines was the
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and
Western nations considered lift engines to provide
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Yak-38 Forger with 2 lift engines behind the cockpit
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198:version of the U.S. Joint Strike Fighter.
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96:December 2023
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