| 1. | The first conversion to horizontal flight took place on 5 November 1954.
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| 2. | The GL-10 performed transitions between vertical and horizontal flight in 2015.
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| 3. | The nozzles point rearward with the lever in the forward position for horizontal flight.
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| 4. | Parviainen achieved approximately 30 seconds of horizontal flight with no noticeable loss of altitude.
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| 5. | Rockets would assist the aircraft to transition to horizontal flight.
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| 6. | When fuel was added, the auxiliary combustion chambers acted as primitive afterburners providing horizontal flight.
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| 7. | The first transition from hovering flight to horizontal flight took place on 20 September 1963.
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| 8. | E1 was powered only by the Pegasus engines, and was designed to test horizontal flight.
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| 9. | Two prototypes were made, both flew, made successful transitions to and from horizontal flight, and landed.
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| 10. | On 6 April 1960, the first in-flight transition between vertical and horizontal flight was successfully conducted.
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