Koolhoven FK 33
Type
2 + 10 seat airliner
Engine
3 Armstrong Siddeley Puma
3 Junkers L5
Dimensions
Length 17.45 m, height 4.75 m, span 24.85 m, wingarea 100 m2
Weights
Empty 3000 kg, load 2000 kg, max. flying weight 6000 kg
Performance
Max. speed at 2500 m 190 km/h, cruising speed at 2500 m 175 km/h, range
1050 km, endurance 6 h
 
Type
Werk.Nr
Registration
History
   
H-N, H-NADD, D-1250
Construction started end of 1924, first flight in June 1925 , the top engine was not fitted. Just after start one of the
engines failed, the pilot was able to turn back to the airfield. In August minor damage. Registration H-N, from 8th
of October H-NADD.
Entered service with the KLM end of 1925.Used on the Amsterdam - London and Paris - Malmö routes. One
emergency landing 17/12 1925 caused by fog. Did not performe well and KLM sold it to Aero GmbH, a
Hamburger company working with advertising. Taken over 3rd of May. Registered in October as D-1250.
Emergency landing 25th of July 1928. Repaired, crashed again in Bremen, repaired again and flown to
Waaalhaven in the Netherlands and made a crash landing. Sold in June to Bäumer Aero GmbH. At the same time
changed engines to Junkers L5, the middle engine got a 3-bladed prop. Instead of the 4-bladed. In September 
the lights were changed to loudspeakers. Taken over by the Firma Michelsen & Spiesen in July 1931. The
engines were dismantled and sold. In February 1932 stricken from the german register. Probably scrapped
Source: Flugzeug Extra Nr 1 ( Hazewinkel and Frost)
Koolhoven FK-33 sportmg its new German registration
Clearly shown is the close proximity ot the fuseiag to
ground. Note the ladder leading to the dorsal engine
three-blade propeller.
Well shown in this shot ol D-1250 while flying for Hamburger Aero GmbH is the advert illumination tacility under the wings.
D-1250 followting one of its numerous crash-landings. In this one at the Dutch aérodrome of Waalhoven the undercarriage was totally destroyed. Note dorsal engine cover.