Dragonfly 21-4  2012/5/11UP
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It is the dragonfly type ornithopter which had four pieces of wing.

A system of flapping is the same as Flaptter19.

An attack angle of ex-wing changed in order to control it.

This mechanism came out of talks with Mr. Ito of Nagoya who carried out research on a flight of a dragonfly.

width 67 cm
length 56 cm
weight 155 g
battery Lipo 3cell 240mAh 27 g
Total flight weight 182 g

Receiver: Corona 4Ch Single Conv. Rx 72MHz
cryistal: Castle Creations Micro Crystal Berg (72MHz)
Servo: Front wing (DM 4.7g servo *2)
Motor: C2020 Micro brushless Outrunner 3500kv (11g)
Gear: Main Gear 0.4M66T Acetal *4 (shaft3mm, 3mm ball bearing)
Spur Gear M0.4 60T, 64P8TPinionWire(4mm ball bearing)
Pinion Gear M0.4 18T (=64P18T)
ESC: H-KING 10A Fixed Wing BrushlessESC
Battery: Lipo 3cell 240mAh G3
Control: 3CH (a motor, front wing 2 servo)
Film of a wing Orcon film
3.0-1.7Carbon pipe & 2-2.5mm carbon rod, 1.2mm 1.6mm 2mm Carbon rod