DIY Prop

Discussion in 'Props' started by Jason, Apr 6, 2020.

  1. Jason
    Joined: Mar 2020
    Posts: 1
    Likes: 0, Points: 1
    Location: Greece

    Jason New Member

    Hi I'm Jason,
    I design boats for the past 5 months in sketch up.
    Now that schools and shops ate closed I decided to modify a Intex Challenger 200 that I have and afterwards donate it to my best friend!
    I am thinking of powering it with an electric 250w motor.
    Can someone suggest me a way to make a diy prop for it??
    I would like it to be made out of household items.
    What size should I make it?
    From which materials??
    is it a good idea to use a part from a PC dc fan?
    Have in mind that the boat is mostly a toy and not a high-performance vehicle!!! Kepp t simple thank you
  2. fredrosse
    Joined: Jan 2005
    Posts: 357
    Likes: 30, Points: 38, Legacy Rep: 56
    Location: Philadelphia PA

    fredrosse USACE Steam

    Better than DIY, just try a small plastic model airplane propeller, they come all sizes and are very low cost. Without knowing your boat details and design RPM you should try a few sizes.
  3. BlueBell
    Joined: May 2017
    Posts: 1,259
    Likes: 241, Points: 63
    Location: Victoria BC Canada

    BlueBell Ahhhhh...

    You can try the PC cooling fan.
    What is the RPM on the motor and the total weight of the boat including everything?
    jehardiman likes this.

  4. jehardiman
    Joined: Aug 2004
    Posts: 2,763
    Likes: 357, Points: 83, Legacy Rep: 2040
    Location: Port Orchard, Washington, USA

    jehardiman Senior Member

    This is the real question. 250w is ~ 1/3 hp. If it makes that a high (1800) rpm, then you are going to be real inefficient and not able to turn a proper propeller. For a motor that big a 6-9 wheel is indicated if you can slow the motor to a proper speed.
    BlueBell likes this.
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