| 1. | The lifting force is caused by the downward stroke of the wings.
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| 2. | In addition, the harness may provide lifting force to simulate free-body flight.
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| 3. | Both effects, the reduced downforce and the extra lifting force, reduce the load on the main wing.
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| 4. | This provides the rest of the upward lifting force required to support the weight of the tower.
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| 5. | Haenlein received an education as a lifting force decreased, so the range of the airship had been limited.
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| 6. | Lifting force of the remaining hydrogen reduced to 1300 1400 kilograms, while the balloon weighed an estimated 2, 120 kilograms.
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| 7. | When this happens, it results in an increase of both primary and induced drag, and decrease of lifting force or thrust.
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| 8. | "Each vortex is a low-pressure area that kind of sucks the wing upward, creating an extra lifting force, " he said.
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| 9. | In some cases the lifting force is provided by magnetic levitation, but stability is provided by a mechanical support bearing little load.
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| 10. | The relatively low pressure that exerts the lifting force against the piston is about the same as the air pressure in automobile tires.
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