Whimsy Embryo

After more than a few years in the queue, Curt Haskell's Whimsy finally sifted to the top of my "Must Build" list.

The Whimsy caught my eye as soon as Bruce Stinshoff sent me a photo of his delightful version 15 years or so ago. I was looking for something fun to build a few months back for the 2016 FAC Nats, and while the original Whimsy design doesn't readily qualify for any of their official events, I quickly realized that a bit of scaling could make it an interesting Embryo. It certainly has more than the needed fuselage volume!

Embryo rules require the fuselage to be able to enclose a box measuring 3 x 1 1/2 x 1 1/4 inches and have a maximum wing area of 50 square inches for monoplanes, or 70 squares if you are adding at least another wing. A bit of CAD sketching showed the right size, and I soon started building.

While the basic construction doesn't hold any real surprises, it does require a lot of bending or laminating to get all those outlines sorted. I thinned Titebond II with water to laminate two strips of 1/16 X 1/32 for all of the curved parts. The rest of the structure is 1/16 square, save a bit of sheeting around the nose. It is covered with Esaki tissue, sealed with a dusting of Deft lacquer.

Unfortunately the wind was formidable this year and the Whimsy spent most of the week in its box. On the day Embryo was contested I chose not to put it in peril and flew my back up Prairie Bird instead. Jason McGuire took the moody photo below as I was flying in calmer evening air, well after official flying had ended for the day.

Still experimenting with trim and power, I am currently using just a 12-inch loop of 1/8 rubber in the Whimsy. The best flight to date is 53 seconds, made in some buoyant air in a local schoolyard on a mere 500 turns.

Whimsy Embryo Details
Weight - 16 grams
Wing Span - 15 in
Length - 14 in
6-inch Prop
Motor - 1 loop of 1/8 Tan Super Sport


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