The MB.320 is a development of the post-war MB.314. Powered by two Continental E.185 engines of 185 hp driving Piaggio mechanical variable pitch or Aeromatic automatic constant speed propellers.
The cantilever low-wing has a NACA 2300 section and wooden single-spar covered by plywood, fitted with differential slotted ailerons and flaps. The fuselage is built in three sections with a detachable metal e cone and woo centre and rear with plywood skins. The centre section contains the cabin and baggage compartments. The wood tail section has trim tabs in the starboard elevator and rudder. The undercarriage is retractable with the fully swivelling nose wheel retracting backwards into the nacelles.
Sound proofed and air conditioned, the cabin seats six, two pilots side-by-side, and four passengers. A baggage compartment is aft of the rear seats.
Introduced in 1949, the MB.320 was produced in limited numbers.
A manufacturing licence was acquired by Societe Francaise de Constructions Aeronautiques Lignel, which planned manufacture as the VEMA-51. This licence was not taken up.
In addition to various Italian commercial concerns, three were sold to East African Airways.
Engines: 2 x Continental E-185, 185 hp
Wingspan: 42 ft 7 in
Wing area: 226 sq.ft
Length: 28 ft 4 in
Height: 10 ft 6 in
Empty weight: 3670 lb
Loaded weight: 5511 lb
Max speed: 186 mph at SL
Cruise: 156.6 mph
Min speed: 65 mph
ROC: 925 mph
Climb to 6500 ft: 5 min 5 sec
Service ceiling: 24,930 ft
Range: 665 mph
Seats: 6
All Aero 