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Sunday, 15 November 2015

A subsonic spinner for the new propeller

To keep the snub-nosed profile of the Avid Flyer, underlined by the tundra tires, the double Simonini exhaust pipes and the Cub inspired decoration, I wanted a shorter spinner than for the old Warprive propeller. As usual, when looking for aircraft parts, I found what I didn’t want at the usual ridiculously high prices… What I wanted was something like a spherical kitchen mixing bowl. In France we call them “cul-de-poule”…
So, as I knew what I wanted I went for a DIY spinner and ordered a cul-de-poule with the right diameter from an online cooking utensils shop and made a spinner support in fiberglass and resin. The trickiest part was to get the right cutout for the propeller as the spinner is short and therefore very curved.
Someone might argue that this is not the optimum aerodynamic shape for a spinner. While this is true the difference should be minor as long as I stay subsonic... 

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