Heinkel HD 27

The HD 27 flew in 1925 and carried mail until 1928, when it was destroyed in a tornado. No more airframes were built, but the HD 27 formed the basis for the HD 39.^[1][2]

Data from ^[3]

General characteristics

• Crew: one
• Capacity: two mail compartments
• Length: 8.80 m (28 ft 10 in)
• Wingspan: 12.40 m (40 ft 8 in)
• Powerplant: 1 × Liberty L-12 V-12 water-cooled in-line piston engine, 300 kW (400 hp)
• Propellers: 2-bladed fixed pitch propeller

Performance

• Maximum speed: 178 km/h (111 mph, 96 kn)
• Cruise speed: 155 km/h (96 mph, 84 kn)

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 499.