The two engines located until this moment are in two museums in Budapest, Hungary. The water-cooled engine at the Museum of Technology and the air-cooled one at the Museum of Aviation.

-As a curiosity we see that on the air-cooled engine there is a cylinder with a welded sleeve for water-cooling. Possibly a fix.

-The intake manifolds are very different. The water-cooled one has asymmetric distribution and the other one is more regular and at the rear.

"Delfosse water-cooled"

-The air-cooled engine is the one that has 105 x 130 mm piston diameter by stroke with a displacement of 3.2 lts. and gives 24 CV at 1,400 rpm. It is from the year 1911, or close to that.

"At the Museum of Aviation"

-According to the literature accompanying this engine at the museum itself, it is an engine manufactured by Delfosse in Germany. (Németorszag). It also says: cylinders in Y, when they really are in fan-shape.

-In the installation on the Cudel airplane of Osgyán Pál it is a water-cooled engine being originally cooled by air.

-As the modification is quite rustic, it is possible to think that the engine, having already a cylinder in this situation, is in the modification phase.

From Appendix 7: We found a group of Deflosse engines, six fan-shaped engines, and 3 rotary radials. All of them prior to WWI.

"Delfosse 5-cylinder rotary"

-The air-cooled rotary Delfosse were:
-The 30 CV with 3 cylinders.
-The 5-cylinder giving 50 CV.
-The 7-cylinder giving 70 CV.

-The fan-shaped engines were:
-The 24-30 CV with 3 cylinders.
-The 30-40 CV with 3 cylinders.
-The 35-45 CV with four cylinders.
-The 50-70 CV with four cylinders.
-The 50-60 CV with 6 cylinders.
-And the 80-100 CV with six cylinders.

"Delfosse fan-shaped"

From Appendix 9: We discovered a 3-cylinder fan-shaped Delfosse at the Stockholm Museum (E-V, AEHS).

“Front and top-rear views”

-With the Anzani formula, the long intake manifolds stand out.

-Found a cross-section side view for the Delfosse 7-cylinder rotary radial engine. Possibly it is the 70 CV.

"Cross-section for the Delfosse mentioned above"

From Appendix 10: New photograph for the three-cylinder engine of this brand. The brand's name is written at the front of the engine.

”Delfosse fan-shaped engine”

-Now we have another radial, new in the A-Z file.

"Delfosse radial"