whats the difference

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5 years 6 months ago #17810 by
whats the difference was created by
hello I was just wondering out of interest what is the difference between a 3 and 2 bladed propeller

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5 years 6 months ago #17811 by MikeSeale
Replied by MikeSeale on topic whats the difference
Approximately 50% more blades on the 3-bladed prop
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5 years 6 months ago #17812 by MikeSeale
Replied by MikeSeale 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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5 years 6 months ago #17813 by MikeSeale
Replied by MikeSeale on topic whats the difference
Advantages of 2 blades
Cheaper
More efficient
Easier to balance

Advantages of 3 blades
Quieter
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5 years 6 months ago - 5 years 6 months ago #17814 by JonTappin
Replied by JonTappin 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: 5 years 6 months ago by JonTappin.
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5 years 6 months ago #17816 by
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thank you very much it makes more sense know :)

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