1. 
   VSTOL
   Aircraft capable of taking off and landing either vertically or using a very short length of runway (see STOL). Vertical takeoff requires a vector-control system that permits the thrust of the aircraft engine to be changed from horizontal to vertical for takeoff and back again to horizontal to permi...
   Found op http://www.talktalk.co.uk/reference/encyclopaedia/hutchinson/m0031868.html
   
   

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