The majority of propellers used in the radio control flying hobby have two blades but props with three or even four blades are available.
Two-bladed propellers are commonly used because they are relatively efficient and easy and cheap to produce but sometimes an rc airplane will call for more blades, particularly where a scale look is required.
Adding more blades decreases the overall efficiency of the prop because each blade has to cut through more turbulent air from the preceding blade - in fact a single bladed propeller is the most efficient but these are rarely (almost never!) seen in our hobby although they have been experimented with. Incidentally a single bladed prop has to be balanced with a counterweight on the other side of the hub to the blade, otherwise the plane would shake itself to pieces as soon as the prop was turning!
If choosing a three or four bladed propeller the general rule of thumb is to decrease the prop diameter by an inch and increase the pitch by an inch, but on some models fuselage and ground clearance issues might dictate which propeller size you can and can't have on the model. As with everything, trial and error...
In which case you would be looking for an 11X9.
I am looking at this Prop because it is available as a pusher as well. I am building my second hexacopter. i have used a couple different static thrust calculators but each gives me a different result. I would like to know if i can use this prop on a Turnigy L3010C-1300kv (420w) motor? i will also be using 50amp (60amp peak) speed controllers.
Well, for this price, its the common price for this blades, except where i live, they want 15€ plus 5€ of postage for this one. For that HK can supplie me a set of 3 and sure I'll save some money in the process. MasterAirScrew in Saito .56 for a small warbird, 10k RPM and a beauty both on ground and in the air. Flex enough so it wont break in contact to the ground, but not flex enough to bent while in higher RPM, a perfect disc with no distortion.
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Muy pero muy buena helice. Balanceada y bien presentada. La voy a usar en un OS .55 AX. Saludos, Mariano.