Experiments: hinge-mount servos, LEDs, optional leading-edge serrations.

Span 28 inches, weight 17 oz, wing area 157 sq.in.
Various 3s Li-Polys, Ultrafly C/13/24H outrunner geared 3:1, APC 10x5 prop.
Zero throttle: 75 mA.
Zero throttle, servos furious: 1.0 A.
Half throttle: 4A 10V 40W.
Full throttle: 7.7A 9.1V 70W, 27 oz thrust.

LEDs powered directly from battery pack, via AWG 32 Kynar wire-wrap wire.

The serrated LE stabilized wing-rock in harrier, and increased elevator authority. This was confirmed with other airplanes and with a week of wind-tunnel tests (data published here). This is probably because the serrations convert large spanwise post-stall eddies into many small chordwise eddies. They also turbulate the leading edge, flattening the lift peak (relative to angle of attack) just before the stall.

Weight budget:
142 g: Foam
15 g: Carbon, other nonfoam
130 g: Lipo, 2.1 Ah
110 g: Prop, gearbox, motor, esc, wires
65 g: 3x HS81MG, 1x HS55 servos
2 g: Decals, Ikea roundels
18 g: Landing gear, 18" of 3/32" piano wire
9 g: Wheels
491 g: Total