Back at Farnborough during the winter of 1904 the D.1 was redesigned and rebuilt, with a new 25 hp R.E.P. engine and a wheeled landing gear, to re emerge as the D.4.
On Dunne’s own admission this D.4 was more of a hopper than a flier. It did make eight flights late in 1908, but the longest was barely 36 m (120 ft) and the War Office declined further financial sup¬port for his experiments.
Wing area: 504 sq.ft
Weight: 1035 lb all up
All Aero 