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whats the difference

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25 Sep 2018 14:05 #17810 by Jacob Winfield
whats the difference was created by Jacob Winfield
hello I was just wondering out of interest what is the difference between a 3 and 2 bladed propeller

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25 Sep 2018 14:08 #17811 by Mike Seale
Replied by Mike Seale on topic whats the difference
Approximately 50% more blades on the 3-bladed prop
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25 Sep 2018 14:18 #17812 by Mike Seale
Replied by Mike Seale on topic whats the difference
A 2-bladed prop is usually a little bit more efficient than 3. It's also easier to manufacture which means it will be cheaper to buy. And it is easier to balance a 2-bladed prop.
A three bladed prop will be smaller in diameter compared to the 2-bladed prop it replaces. For example, 12x6 two bladed prop might give the same performance as an 11x6 three bladed prop. This smaller diameter means that the tips of the prop are moving at a slower speed. This reduced tip speed will make the 3-bladed prop quieter than the 2-bladed prop
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25 Sep 2018 14:20 #17813 by Mike Seale
Replied by Mike Seale on topic whats the difference
Advantages of 2 blades
Cheaper
More efficient
Easier to balance

Advantages of 3 blades
Quieter
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25 Sep 2018 14:24 - 25 Sep 2018 14:26 #17814 by Jon Tappin
Replied by Jon Tappin on topic whats the difference

JacobWinfield12 wrote: hello I was just wondering out of interest what is the difference between a 3 and 2 bladed propeller


Although Mike has thoroughly answered your question :)

I will add that in simple terms, 2 blade props are more efficient than 3 blades, but 3 blades are quieter as the diameter is less and hence so is the tip speed

Edit- I posted this after Mike's first reply, now I see that he has answered in full, happily he has also given you the same answer but in more detail!
Last edit: 25 Sep 2018 14:26 by Jon Tappin.
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25 Sep 2018 14:39 #17816 by Jacob Winfield
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thank you very much it makes more sense know :)

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26 Sep 2018 14:35 #17825 by David Tappin
Replied by David Tappin on topic whats the difference
Mike mentioned

Advantages of 2 blades

Another advantage over three blades:
Two blader is less likely than a three blader to give you a rap on the knuckles when hand starting!

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