Koekebakker Pusher Light Dutch Monoplane of 1949 ?

[hesham]

From L'Air 1949,

here is a two-seat shoulder-wing light Dutch Airplane,maybe remained a Project,designed by Mr. Koekebakker in 1949,
powered by one 65 hp Continental Pusher engine,does anyone hear about it before ?.

 

[Apophenia]

Interesting. So, some rearranged surplus wartime Piper Cub components and a new fuselage to create a pusher lightplane. Some vague similarities to ir. Henk Koekebakker's wartime design for the low-winged Difoga 421. The latter Koekebakker designed in hiding at Bergen op Zoom for Frits Diepens during WW2 (eventually leading to the Fokker F.25 Promotor).

Around the same time as your lightplane, Henk Koekebakker and Kees van der Eyk designed the one-off KNVvL-491 sailplane. It was built at Bergen op Zoom around 1951 but transported to Ypenburg for its first flight in June 1952. A high landing speed prevented the KNVvL-491 from being considered a complete success.

FWIW, Henk Koekebakker had been at both De Schelde and Pander & Zonen around the same times as Theo Slot.

 

[hesham]

By the way,there are Koekebakker 471 and 481,also,

Koekebakker 541 1954

Inspired by a New Zealand specification for a crop duster aircraft, Koekebakker designed the 541 and soon after the 541H ("H" for Hopper) for solids drop.

It was a single-engine shoulder decker that would initially be built by the still existing NV Koolhoven.
When he (i.e. Van Driel and Van Ommeren) lost interest, Koekebakker tried to have the aircraft built by Frits Diepen, Aviolanda or Fokker in 1956. It all came to nothing, especially because New Zealand had decided to build the Fletcher FU-24 under license.

https://www.hdekker.info/registermap/kandidaten.htm

 

[Apophenia]

If we are compiling Koekebakker designations without descriptions, you might add 'Koekebakker 591' - listed in the Luchtvaart Kennis index under "Vliegtuigtypes'.

On these machine-translations, please take some care. Phrases like "shoulder decker" are simply not English terms.

But something also gets lost in Herman Dekker's description. In the second paragraph, the Koekebakker 541 design was described as a 'shoulder-winged aircraft which was to be built, initially, by the still-existing NV Koolhoven.' But then, in the third paragraph, Dekker says that "Van Driel en Van Ommeren" lost interest in the project.

To parse that, you need to know that the NV Koolhoven Vliegtuigen factory was destroyed during the war. In 1953, when aircraft construction was resumed, Koolhoven employees were housed in the premises of NV Machinefabriek v/h Van Driel en Van Ommeren - a Koolhoven subsidiary.

BTW, in the hangar with the signage (attached) were Piper Cubs belonging to Van Driel en Van Ommeren ... relevant, I think, to your first post.

-- Image: https://stadsarchief.rotterdam.nl/zoek-en-ontdek/beeld-en-geluid/zoekresultaat-beeldgeluid/?mivast=184&mizig=299&miadt=184&miview=gal&milang=nl&misort=last_mod|asc&mistart=125&mizk_alle=trefwoord:Schiehaven

 

[hesham]

By the way,there are Koekebakker 471 and 481,also,

Difoga 471

After being involved in the design and construction of the Difoga 421 (PH-NAG), H. Koekebakker designed together with Ing. J. Weyer a light sport aircraft that looked somewhat similar.

However, it had one tail boom and would use parts of the Piper Cub (wing, undercarriage and tail section).

The production version, the Difoga 481, would differ in details, but nothing was built at all.

https://www.hdekker.info/registermap/kandidaten.htm