Martec Folding Prop
I have a 2 blade, Martec folding prop on my h34. It has a couple of characteristic that take getting used to. First, both blades don't alway open at low speeds. Unless you rev the engine, sometimes only one blade opens and you get intense vibration. This is more pronounced if the rudder is hard to either side, since the rudder "reflects" water back at the prop, making it harder to open. Also, in reverse, the prop doesn't open unless you increase the rpm a little. After it opens, you can back it off. You have to remember that the boat's forward movement is trying to keep the propellor closed, until you get enough rpm to open it with centripedal force. But I love it! Once you get used to reving a little to open the blades, it's no problem. And compared to the traditional fixed 3 blade prop, well they are like dragging a big bucket behind your boat on a rope. You should get 1/2 knot or more in light winds. It took me a couple of weeks to get used to it, especially in docking, but it's worth it.
