While the 'Baby' began production, Porte designed a new form of flying boat hull, and tested it on a modified Curtiss H4 (No 3850). The resulting aircraft was at first titled the Porte 1, and later officially designated Felix-stowe F.1.
Span: 22 m (72 ft) (upper), 14 m (46 ft) (lower)
Length: 11 m (36 ft 2 in) (hull only)
Maximum speed: approx 125.5 km/h (78 mph)