Type a Two seat fighter and trainer seaplane b Two seat fighter and trainer seaplane
Engine 1 BMW VI 7,3 ZU 1 BMW  VI Z
Dimensions Length  11,6 m, height 4,5 m ,  span 16,8 m , wing area  48,48 m2 ,
Weights Empty 2130 kg, loaded  3000 kg, max. take off weight , fuel 700 l  Empty 2050 kg, loaded  3150 kg, max. take off weight   , fuel 800 l
Performance Max.. speed 260 km/h , landing speed  91 km/h, cruising speed  , range 860 km, endurance 4,3 h , service ceiling 5900 m  , climb to 1000 m 2,5 min., to 2000 m 5,1 min., to 3000 m 8,0 min., to 4000 m 12,1 min., to 5000 m 22,1 min., Max.. speed 238 km/h , landing speed 95 km/h, cruising speed  , range , endurance  , service ceiling  4350 m , climb to 1000 m 3,8 min., to 2000 m 9,0 min.
Armament Optional: 1 fixed and 1 movable 7,9 mm MG 08/15
Type Werk.Nr Registration History
a 319 D-1617 DVL
b 325 D-1625, D-IPYF DVS
c 328 D-1688, D-IKAQ DVS
c 329 D-1689 DVS Crashed 17.6.1931
c 330 D-1690 DVS Crashed 13.4.1934
c 331 D-1691, D-ILIQ DVS, Luftdienst. From August 1931 modified to d
d 360 D-1941 DVS, RDL
d 361 D-1947 RDL, DVS Travemünde
d 362 D-1950 DVS, RDL
d 382 D-2095, D-IXAV Luftdienst
d 383 D-2158 DVS
d 101 D-2003, D-IPYV Built by Focke Wulf. DVS
d 102 D-1976, D-IXYZ Built by Focke Wulf. DVL
d 103 D-1966, D-IXOX Built by Focke Wulf. DVL
In 1928, Heinkel developed a three-seat hydroplane HE.9 with a BWM VIu 7.3Z engine producing 750 hp. (552 kW)
The HE.9a prototype (D-1617), it set several world speed records for seaplane cargo.
On May 21, 1929, it set several world records for seaplanes, including a speed record of 231 km/h on a 500 km route with a load of 1000 kg. On June 10, an HE 9 aircraft set a speed record on a 1000-km route with a load of 1000 kg.
A little later, one three-seater HE.9b and four two-seater HE.9c with a BMW VI 6.3ZU 660 hp engine were produced. (485 kW). All of them were transferred to the Deutsche Verkehrsfliegerschule (DVS).
During 1930-31, eight more examples of the HE.9d were produced with the same power plant as the HE.9a and a slightly lengthened fuselage.
Some of the aircraft were also transferred to DVS, and several to the naval base in Warnemünde, for the so-called “Kohler group”, where naval pilots were trained. The last HE.9s were withdrawn from service with training units in 1936-37.

Brief technical description of HE.9c.

The fuselage was a wooden frame with a fabric covering of the body. The crew was in an open cockpit and was protected from the wind by plexiglass visors.
The wing and ailerons were made of a wooden frame with a fabric covering of the body. The plumage was made according to a single-keel design.
The chassis consisted of two large wooden floats. The floats were attached to the fuselage and wings using struts.
The power plant consisted of a V-shaped water-cooled BMW VIa engine with a power of 660 hp. The engine drove a three-bladed constant pitch propeller.