BENTON B.III, IV, V, VI and VII biplanes

   The Benton B.III was a conventional tractor biplane with warping wings, powered by the same NEC engine as used on the earlier types. The machine was modified progressively to become the B.IV to B.VII, the most radical change being to introduce hinged trailing edges to the wings, operated by the pilot, to provide camber-changing flaps.
   The B.III and its successors were flown successfully between 1912 and 1914 for distances of about a mile from the field at Chalvey. The final version survived in the hangar there until it was scrapped in 1919.