Armstrong Whitworth FK10 Quadruplane (oz16349)

About this Plan

Armstrong Whitworth FK10 Quadruplane. Radio control sport-scale quadraplane model, for electric power. Wingspan 33-1/2 in.

Direct submission to Outerzone.

Quote: "Hiya Steve, Four wings and eight ailerons? In 1916, inspired by the success of the Sopwith and Fokker triplane fighters, it looks as though Armstrong Whitworth thought they'd go one better by building a four-wing fighter. The overlapping narrow chord of the wings would supposedly aid the pilot's field of vision.

The FK10 (named after designer Frederick Koolhoven) was hardly a game-changer. Only 8 were built, and they never saw active service.

This was my very first attempt at designing a model, and the construction was very much influenced by Peter Rake's Sopwith Triplane design.

There's a full build thread on RC Groups;

https://www.rcgroups.com/forums/showthread.php?254469-Armstrong-Whitworth-four-winger-build-thread-Perhaps

Construction is all balsa, with plug-in wing cells. The short nose inspired me to use the 7x1300 NiCad cells as dummy cylinders inside the cowl, which worked very well. Once the NiCads eventually died, I managed to squeeze a 3S 1800 li-po behind the firewall (but kept 5 of the NiCads in place for nose weight), using the same HET Typhoon 15 outrunner.

As an aside, in 2015, 10 years after building this little model, I set about building an 80" Quadruplane (10S power, 22lb AUW) which flies very nicely indeed [pics 015-017].

Tim"

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