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  1. I

    Mcculloch 4318A prop size

    Thanks for all the feedback and suggestions. I like the idea of a bigger prop as it would encounter "cleaner" air further away from the vehicle body, but as illustrated above, there is a limit to how fast a prop tip can travel through the air before running into problems with cavitation. From...
  2. I

    Mcculloch 4318A prop size

    I'm looking for suggestions as to what prop size would be appropriate for a Mculloch 4318a 72 HP motor. I live in Whitehorse Yukon and picked this motor up recently with the intention of building a small air boat type design that can run on SNOW. I have experience with RC airplanes in the remote...
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