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  1. M

    Looking for planetary gears for 25,000RPM

    So the motor that I want to use for my electric surfboard has a max speed of 25,000RPM. I want to reduce that to 3000-5000 RPM. Can you recommend any planetary gearboxes for that input speed? All the german manufacturers max out at roughly 8000RPM. I am not even sure what would happen at...
  2. M

    E-foil Foil Wing Design Discussion

    Please point out if the following logic is right or wrong. I am not convinced that E-foils should use the same wing geometry that Kiteboards, Wakeboards or Surfboards use. In those three cases, the propelling force acts high above the board. This generates a moment that wants to push the nose...
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