| 1. | Rocket-powered aircraft and spaceplanes have also made unpowered landings.
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| 2. | SpaceShipOne is then drop-released, and briefly glides unpowered.
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| 3. | Four unpowered Pennsylvania Railroad classification system is a " G ".
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| 4. | Added NOTE : The mechanical unpowered steering effort is very heavy.
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| 5. | Newly developed eddy current brakes were installed on the unpowered bogies.
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| 6. | Unpowered boating is permitted on Echo and North-South lakes.
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| 7. | Later the unpowered glider version was put back into limited production.
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| 8. | Unpowered carriages could also be attached and some had control equipment.
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| 9. | It had a very unusual configuration : the missile body was unpowered.
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| 10. | There are also unpowered guided glide bombs not considered missiles.
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