Koolhoven FK 33
2 + 10 seat airliner
3 Armstrong Siddeley Puma
3 Junkers L5
Length 17.45 m, height 4.75 m, span 24.85 m, wingarea 100 m2
Empty 3000 kg, load 2000 kg, max. flying weight 6000 kg
Max. speed at 2500 m 190 km/h, cruising speed at 2500 m 175 km/h, range
1050 km, endurance 6 h
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.