Thank you my friends, it is always supportive to read such nice feedback, but I have to say also thanks to Small Stuff for such great engine kits!
AirscrewThis time I had a little rebound ...
According to the Datafile drawing I sanded a wooden airscrew, here with the one from the kit and the back plate.

The hole in the back plate was much bigger as the engine axle. I turned a sprue to matching diameter drilled carefully a small conical whole until it matches the Le Rhone axle. The distance to the bonnet could be adjusted by moving the Plat on the sprue.

Then I found some discussion on a finished model (long time ago in another forum) and the following pictures shows, there is no wood grain visible! Further the blades seems to be much bigger compared to the drawing, so Eduard seems to be right.

Quelle: wikimedia.org
So I dropped the idea of the wooden one - back to plastic! Primed already.

Later I decided to add 4 nickel silver wires to the front side of the blades, which holds the bullet deflectors on the back side. This is a interesting detail! I had to sand carefully to clean from CA.

Painted with Alclad and brown. After every painting layer I polished the wires, to avoid a lower layer gets visible later.

With orange and brown
Clear-color layers it looks now like dark painted wood.

On the back side I added the PE plate, but cut the flat connection to the deflectors and replaced them by round thin nickel silver.

The front side with red color and spallings.

After the mounting (luckily with wood glue!) the wires do not look good, running to tilted to the deflectors. So I removed the wires and after cut put them below the PE.

Now all fits! The screw is on the pictures at 1 o'clock, so the deflector is not in front of the gun barrel.

The bullet deflectors are an interesting detail, which avoids to destroy the blades, but it only works with the french copper bullets. The Germans tried that with steel bullets - different result

Cheers,
Frank