A preliminary study of techniques for performing the transition between wing-borne and jet-borne flight was then made. Although computation limitations precluded transitions to speeds below 40, kt, some valuable information was gained. In particular, a number of transitions were performed success¬fully, and without great difficulty, while following an I.L.S. beam. As a result of these tests, it is believed that jet VTOL aircraft with adequate stability may have a greater potential than had been anticipated for operating in poor weather, without the complicated flight-director systems and automatic controls that have generally been thought to be necessary.
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