I try to use the correct specs for the aircraft and define them in the MFC VA System:
Specifications (DHC-2) de Havilland Canada DHC-2 Beaver :
(
https://en.wikipedia.org/wiki/De_Havilland_Canada_DHC-2_Beaver)
Data from The Encyclopedia of World Aircraft,[68] BAE Systems[1]
General characteristics
Crew: 1
Capacity: 6 passengers, 2,100 lb (953 kg) useful load
Length: 30 ft 3 in (9.22 m)
Wingspan: 48 ft 0 in (14.63 m)
Height: 9 ft 0 in (2.74 m)
Wing area: 250 ft2 (23.2 m2)
Empty weight: 3,000 lb (1,361 kg)
Gross weight: 5,100 lb (2,313 kg)
Powerplant: 1 × Pratt & Whitney R-985 Wasp Jr. radial engine, 450 hp (336 kW)
Performance
Maximum speed: 158 mph (255 km/h)
Cruise speed: 143 mph (230 km/h)
Range: 455 miles (732 km)
Service ceiling: 18,000 ft (5,486 m)
Rate of climb: 1,020 ft/min (5.2 m/s)