Freewing Moray replacement spinner

My Freewing Moray* spinner cracked after one too many crashes and I was not able to source a replacement so I decided to design and print one.

I added some blades to the spinner backplane as I felt that it could do with a bit more cooling.

The result is as shown here. I was initially concerned about balance and strength but I have run it without a prop at maximum revs and it has been fine with no signs of either vibration or any distortion due to the centrifugal force.

I use two servo retaining screws to hold the dome to the backplane.

Please be careful if you print one - the high speeds and high revs make this inherently dangerous and I cannot be held responsible for any injury or damage that may result from making or using one of these spinners.

*If you are wondering what a Freewing Moray is then please click here http://www.rcairplanereviews.com/rc-airplane-reviews/237-freewingmorayreview.html - the photo of the model flying comes from this review.