Are you saying you don’t know the answer yourself Moggy? 😀

Hmm, early style windscreen and wings but four blade prop? Is this a combination of parts thrown together for a movie?? One of the MarkAddies perhaps?

It does look a bit suspect somehow, I’m not ruling out the possibility that it’s a model/GRP replica.

Had a crap day yesterday. Can you tell?

No. Let’s see a photo of the dents in the Rearwin from where you kicked it. Then we’ll believe you! 😀

I think we’re trying to say the same thing Hamtech! Indeed any single-shaft turbine or piston is started in fine pitch as the drag from a feathered prop would mean too much resistance for the engine to overcome. In a turbine this would show up as excissively high TIT readings (or EGT). A piston engine would need a lot of fuel and a large starter to get it cranking enough to start. First off that means an extremely large starter (weight penalty) and a lot of electrical power to get it moving. The large amount of fuel will mean high cylinder temps, also bad on a cold engine.

Still you want to design your prop system in such a way that in case of failure the prop moves to the feathered position without any additional needed machinery or power. In small pistons this is usually done through a spring in the prop hub with oil pressure driving the prop to fine pitch during normal flight. A low pitch lock which engages below a certain RPM ensures that the blades don’t move to feather when shutting down. The system probably is pretty similar on most turboprops.

… as I mentioned in my post above :rolleyes: