The W-6 Aqua I was the first version, a 4-6 seat utility flying boat which had two 125 hp Lycoming O-290-A series engines. Registered NX74141 it made the first flight during 1946 and was extensively tested at the Philadelphia Seaplane Base.
Span: 36 ft 6 in (11.13 m)
Length: 29 ft 6 in (9.00 m)
Height (on land): 12 ft 0 in (3.36 m)
Wing area: 215 sq.ft (19.9 sq.m)
Weight empty: 2,200 lb (1,000 kg)
Loaded weight: 3,600 lb (1,635 kg)
Max speed: 135 mph (217 kmh)
Climb: 1,250 ft (281 m)/min
The W-6A Aqua II was possibly modified from the Aqua I, and had several major changes such as re-contoured nose section, a modified vertical tail and fin assembly and a tricycle undercarriage, making it an amphibious flying boat. The Aqua II was powered by two 225 hp Lycoming O-435 engines and it made the first flight in 1949. No further work on either the Aqua I or II was undertaken.
(Reports that later the boat hull of the Aqua II was used in the homebuilt Collins W-7 Dipper, flown August 28, 1982 as N25WC, are incorrect. The Collins Dipper project was converted from a damaged Cessna 150 and had a new boat hull fitted below the fuselage. The boat hull was designed by the Aqua designer Meredith Wardle and was about 92% in size of the Aqua II boat hull.)"