In the photo above, you see it in it's latest flying form; I replaced the smaller 9 gram motor with an ~18 gram motor, which gave it the power it needed to perform superbly! I'm flying an APC 6x5.5 propeller on this motor, and flying a 3S 620 mAH battery pack. The above photos also show the larger 2-9/16" GWS foam wheels which give a bit more prop to ground clearance.
The SPINNER 20 is somewhat based as a scaled-down version of my very successful 30" wingspan SPINNER, which I designed in November of 2004. It is also partially inspired by the 'Shark Bait' design. It has a wing, tailgroup, and upper fuselage which is built of Bluecor fanfold foam, while the under-fuselage is made from EPP. It features very lightweight landing gear made from 2mm CF rod, and employs wing tip plates.
The battery is carried within the EPP foam fuselage, directly on the center line of the wingspan, to keep the aircraft balanced. This enclosed battery compartment is shown in the photo below. This also keeps the battery warm during winter flying sessions, which is necessary for good battery performance.
The photos below show the smaller 9 gram motor mounted with it's GWS 6x3 propeller; the 6mm motor mount fits the bearing tube on both the 9 gram and '16 gram' motors, so the motor swap-out was easy. (This aircraft was flown with the smaller 2"white plastic GWS wheels shown in these photos previously.)
Wingspan = 20"
Overall Length (without motor): 17.2"
Horizontal Stabilizer span: 13"
3 HXT500 servos
Corona RS410 receiver
~18 gram brushless motor
2" GWS light plastic wheels
Motor: "16 gram" brushless
ESC: Turnigy Plush 10A
Battery : 3S HXT 620 mAH LiPoly
Propeller: APC 6x5.5 electric prop
The counter-balanced elevator gives smooth control response while minimizing the load on the modest size servo.
For information on a somewhat similar 18" wingspan design, the Shark Bait, CLICK HERE to visit the discussion thread on RC Groups. My postings begin on page 8, post 119.