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  • 4 blades propellers

    Hi,
    Could somebody explain me how are made the 4 blades propellers (or point some dedicated site ?) : I can't imagine how are disposed the different layers ...
    Sorry for my pour english,
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  • #2
    Here's a picture from a Paragon catalog showing the construction principle of a 3 blade propeller, which they felt had a much stronger hub than a 4 blade.



    Most of the 4 blades I've seen have had a similar type of arrangement, using a square step-cut instead of the tapered cut shown above. The 4 blade hub does have some inherent weakness, however.

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    • #3
      Thank you for your answer (and sorry for the delay of this !)
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