The Heinkel HE 18 was a sports aircraft built in Germany in the mid 1920s. It was a two-seat conventional low-wing monoplane. A development of the HE 3, it had a narrower fuselage than the HE3, having tandem seating instead of side-by-side. Also, its wings were braced by a pair of struts on each side, arranged in a V-shape with a single attachment point on each side of the upper fuselage, where the HE 3 had cantilever wings. The wings could be folded flat along the sides of the fuselage for transport or storage, and a choice of wheeled or float undercarriage was available. A roll-bar was available that could be fitted in order to protect the occupants in case of a roll-over on the ground.

General characteristics

• Crew: One pilot
• Capacity: 1 passenger
• Length: 7.20 m (23 ft 7 in)
• Wingspan: 11.10 m (36 ft 5 in)
• Wing area: 17.5 m² (188 sq ft)
• Empty weight: 380 kg (836 lb)
• Gross weight: 600 kg (1,320 lb)
• Powerplant: 1 × Siemens , 57 kW (75 hp)

Performance

• Maximum speed: 150 km/h (94 mph, 82 kn)
• Rate of climb: 2.8 m/s (550 ft/min)

• Taylor, Michael J. H. (1989). Jane's Encyclopedia of Aviation. London: Studio Editions. p. 498. ISBN 1-85170-324-1.
• "The Heinkel H.E.18 Sports Monoplane". Flight: 175–77. 26 March 1925. Retrieved 2008-04-23.