Yep, that was easy one. BV 222 was largest flying boat to achieve operation status and the second largest flying boat of the ww2...
Blohm Und Voss Bv222 "Wiking"
Manufacturer: Blohm Und Voss Type: Long-range transport / maritime patrol and reconnaisance aircraft
Powerplant: Six 746-kW (1,000hp) Junkers Jumo 207C inline diesel engines.
Weights: Empty 30650kg (67,572lb); maximum take-off 49000kg (108,027lb)
Performance: Maximum speed 390km/h (242mph); service ceiling 7300m (23,950ft); range 6095km (3,787 miles)
Dimensions: Span 46m (150ft 11in); length 37m (121ft 4 3/4in); height 10.90m (35ft 9in); wing area 255m2 (2,744.89 sq.ft)
Armament: Bv 222C-09 (production series): three 20mm MG 151 cannon (one each in forward dorsal and two over-wing turrets), and five 13-mm (0.51-in) MG 131 machine guns (one each in bow position and four beam hatches.)