How to Cut the Prop Slots in a Spinner on a Model RC Plane

Written by amanda hevener
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How to Cut the Prop Slots in a Spinner on a Model RC Plane
The spinner protects the propeller from debris. (David De Lossy/Photodisc/Getty Images)

Gas and nitro-fuelled radio controlled planes use propellers to help gain thrust when the aeroplane is in the air. These propellers also give the plane a realistic look. In order to hold the propeller onto the nose of the plane, a spinner is used. The propeller is mounted directly onto the plane and the spinner is put over it. In order to fit correctly, the spinner must have slots cut into the base of it for the propeller to protrude through.

Skill level:

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Things you need

  • Propeller
  • Back plate
  • Nut and bolt
  • Ruler
  • Small piece of paper
  • Pencil
  • X-acto knife
  • Masking tape
  • Marker
  • Dremel
  • Sandpaper
  • Hand file

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  1. 1

    Place the propeller on the back plate and line them up so that the bolt slides through the centre. Thread the nut on to the bolt and tighten it by hand. This will hold the propeller solidly in place while you measure it.

  2. 2

    Use the ruler to measure the size of the propeller from the top (outside face) down. Transfer the main shape and size to the piece of paper, sketching them out with the pencil. You need to create a stencil that will be placed onto the spinner and cut out.

  3. 3

    Cut the design out with the X-acto knife and place it over the propeller and back plate. If it is too small, slice a little more of the design out. There should be a few millimetres of space between the two, but not so much that the propeller will come out of the spinner while it is in motion.

  4. 4

    Tape the completed paper stencil to the base of the spinner. Place the tape on three sides: the top, left and right. Trace the stencil onto the spinner with the marker, then remove it and repeat on the opposite side.

  5. 5

    Cut out the stencilled shapes with the dremel. Smooth away any sharp edges with the sandpaper, then test fit it onto the propeller and back plate to make sure that it fits correctly. If any fine tuning is needed, use the hand file to whittle away the ill-fitting areas.

Tips and warnings

  • Wear a mask while using the dremel, sandpaper and file to avoid breathing in any dust from the spinner.

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