Swedish Chickadee Pictures

Top view of Stefan's completed Chickadee

Top view of Stefan’s completed Chickadee

Stefan, hailing from Sollentuna, Sweden recently completed his build of the Chickadee. Following are some details of Stefan’s useful modifications to the original airplane. Chickadee CAD plans are included with the Blackburn plan set available here. The Chickadee sizing, wing incidence and moment setup were the prototype basis for my Blackburn plan.

The Chickadee is one of my early designs. The model uses a simplified construction method detailed here and is easy to modify as the builder sees fit. The Chickadee is a great choice for a first time RC model airplane builder.

Top rear view of Stefan's Chickadee

Top rear view of Stefan’s Chickadee

Stefan did a wonderful job with his Chickadee modifications. Further insights follow:

1. Stefan elected to keep the wing spars square instead of sanding them to a round shape. Stefan added a matching notch to the wing ribs to account for the square shape of the spars.

2. Stefan employed sheets of 0.4 mm carbon for the wing spar reinforcements instead of the plywood strips used in the original. He also wrapped the inner 10 cm of the wing spars with some Kevlar thread, wetting the assembly with thin CA glue.

Detail of string control setup for Stefan's Chickadee

Detail of string control setup for Stefan’s Chickadee

3. This was Stefan’s first time covering the wing and tail surfaces with Japanese tissue, looks like it came out very well.

4. Stefan decided to go with pull-strings made from Kevlar thread for the rudder control instead of pushrods.

5. Stefan used a Dualsky XM2215RTR-17 20 gram electric motor with a built in electronic speed control. He added a 2S-360 mAh Lipo battery for power the arrangement.

Detail of nose section of Stefan's Chickadee showing engine installation and wing attachment

Detail of nose section of Stefan’s Chickadee showing engine installation and wing attachment

The resultant savings in weight meant that he had to move the wing to the rear 10 mm and the motor 5 mm forward to achieve the correct center of gravity location. The final flight weight is a very respectable 194 grams.

Stefan offers an excellent example of the benefits of constructing an RC model from plans, with the ability to make simple modifications as desired to personalize your version of the aircraft.

As a final note, Stefan’s eight year old daughter came up with the neat idea of using a ping-pong ball as a pilot figure. Well done!

 

Top view of Stefan's ping pong ball pilot figure

Top view of Stefan’s ping pong ball pilot figure

 

Top view of Stefan's Chickadee

Top view of Stefan’s Chickadee