Today I made the first test runs. As planned I removed the originally prop nut and replaced it by the centering sleeve. Before mounting I balanced the prop and found it well balanced - no surprise, since the hub is CNC milled and the blades have the same weight. Well, the prop turned, , tracking of the blades is perfect. As expected the hub gets pretty hot, after a few minutes run you cannot touch it anymore. Since I have used GFK propellers before (Biela) I do not expect any problems. Nevetheless I will ask Mr. Ramoser about his opinion. Next step ist to adjust the correct pitch, that will need some test flights. The blades are very thin, similar to APC, so I hope for high rpms and maybe slightly more pitch than the APC provide.
Below some pics of the original setup with spinner nut, which turned out to be too short for the crank of the RCV.
Next is the mounted prop with centering sleeve and the RCV lock nut.
And last is a pic of the blade, seen from the side. The tips of the blades are bent forward, for whatever reason.

The weight of the blades+hub is 104 gramms. Togehter with the prop nut its a 140 gramms, another reason to skip the prop nut.

So what do you guys think about aluminium propeller blades? Beside the shiny and very scale look I do believe it would perfectly aid cooling of the RCV.

regards
Andi