In 1948, far a light freighter, SAI-Ambrosini modified the wartime Lombarda A.L.12P freight carrying glider to take two 225 hp Alfa 115 four-cylinder air-cooled engines. They also fitted a simple wide-track, fixed, tail wheel undercarriage and re-designated the aircraft P.512.
The lines of the AL.12P have been retained along with the swivelling forward fuselage section which hinges on a vertical axis for loading.
The P.512 is a high-wing monoplane. The wing is wooden monospar with plywood covering and fitted with aerodynamically balanced differentially-operated slotted ailerons. The fuselage is a woken semi-monocoque of elliptical section.
The tail unit is of wooden construction covered by fabric. Elevators and rudder contain trim tabs, the rudder adjustable in flight; the elevator on the ground.
The forward section of the fuselage, containing the pilot’s compartment, hinges to starboard, simplifying access to the pilots’ compartment and enabling bulky objects to be loaded easily. Two doors, 3 ft 6 in by 2 ft 3 in are placed either side of the fuselage forward of the wing leading edge.
Engines: two 225 hp Alfa 115
Wingspan: 70 ft
Length: 46 ft
Height: 11 ft
Wing area: 546 sq.ft
Empty weight: 4410 lb
Useful load: 3527 lb
Loaded weight: 7937 lb
Wing loading: 14.5 lb/sq.ft
Power loading: 17.6 lb/hp
Max speed SL: 155 mph
Cruise 70%: 143 mph
Min speed no flap: 60 mph
Min speed w/flap: 53 mph
ROC SL: 970 fpm
Climb to 3280 ft: 3 min 39 sec
Climb to 23,000 ft: 75 min 8 sec
Est ceiling: 24,000 ft
Service ceiling: 21,200 ft
SE ceiling: 6900 ft
All Aero 