Dornier Do.27 With Unusual Landing Gear

[Cy-27]

The image below was found in a book on Dornier types.

Does any one know what this landing gear testing was all about? I think the markings may be PO+HG or FO+HG.

Did this undercarriage "guinea-pig" have a dedicated Dornier designation designation?

Anybody know when the tests took place?

The associated caption for the Do.27 photo reads "Heeresfliegerstaffel 4 came to Rotenburg to test a new chassis".

Source:
Dornier Flugzeuge Seit 1915 (Manfred Griehl) Motorbuch ISBN 9783613031067

 

[TomS]

Looks like an application of the Bonmartini pneumatic tracked landing gear concept. The idea is to reduce ground pressure and improve rough-terrain performance.

 

[Cy-27]

Many thanks for the steer TomS, had a look at a couple of other Count Bonmartini experiments (with an Auster and Piper Cub) on the Web and I think you are right.