Cheetah Vented Spinners

Cheetah Vented Spinner

Racing E-F1 during the hot summer months here in the South can be challenging. The extreme heat can damage or destroy motors and speed controllers alike. As necessity is often the mother of invention, the Austin E-F1 club devised a simple modified spinner that blows a jet of air directly into the motor as a means to control heat. This modified spinner is now being offered for sale to other E-F1 racing enthusiasts that might have similar cooling needs.

The Cheetah Spinner starts as a Great Planes aluminum backed spinner. We precision machine each one by hand to drill out the plastic spinner tip with a 3/8 hole. Also, we machine the aluminum backplate to fit one of two standard collet sizes, 7mm (O.S.) or 9.45mm (E-Flight). The result is a perfectly balanced spinner that will jet air through the spinner directly into the motor.


  • The Cheetah Spinner is available in two sizes: 1 ½ and 1 ¾


  • The 1 ½ spinners are available in two colors: red and black
  • The 1 ¾ spinners are available in two colors: white and black

Most racers prefer to purchase the ligher colors as these are easy to paint to custom colors. Just de-gloss with denatured alcohol or sanding and paint with acrylic paint.


  • $18.00 per spinner
  • $8.00 for aluminium collet
  • $5.50 USPS priority shipping per 1-6 spinners (up to 6 fit in a single box)

Please note that these spinners are being purchased at full retail, modified by hand tooling, and then shipped at full retail. As a result, our pricing has to be higher than we would prefer in order to just break even on costs. Our hope is that once our idea gets out there, someone else with wholesale purchasing power and manufacturing of scale will take this idea forward and offer it for less.

How to Order:



  • Quantity ____
  • Size ___1 1/2 or ___1 3/4 or ___2in
  • Color Desired __________
  • Include a collect __Yes  __No
  • Spinner Backplate Size __Factory(no change) or __7mm (O.S.) or __9.45mm (E-Flight) or __8mm(NTM)
  • Your Contact info:
    • Full Name
    • Mailing Address
    • E-Mail Address

We will then get back to you with a confirmation and details on how to make payment via Paypal.


  • How much of a cooling difference does this make?

We found that racing and practicing during the hottest months led to a lot of burned out motors. We have not yet burned out even a single motor equipped with a Cheetah Vented Spinner.

  • Will this make my plane go faster?

Venting the tip of a spinner adds aerodynamic drag, which of course does not help with speed. However, as magnets heat up to a certain point, they become less efficient. Thus, our answer is: it depends on your individual racing environment and conditions. You will ultimately need to judge for yourself as to the effectiveness in your locale.

Common Sizes:

In case it helps, here are spinner sizes for common models:

  • Shoestring = 1 1/2
  • Invictus = 1 3/4
  • Proud Bird = 1 3/4
  • Wagner = 1 1/2
  • Toni (later model) = 1 3/4


 Cheetah Vented Spinner 2