PteroDactyle V tail
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                                  VTR1 (13MB MPEG)
                                              VTR 1 (You Tube)
                                               VTR 2 (You Tube)
                                                                                         VTR 3 (You Tube)

width 106.6 cm
length 67.0 cm
weight 370.0
Lipo 3cell 800mAh 80.0
Total flight weight 450.0

Receiver: Castle Creations Berg Microstamp 4L 4Ch Micro Rx FM
cryistal: Castle Creations Micro Crystal Berg 52(72MHz)
Servo: elevon (Hitec HS-45 Feather Premium High Speed/Torque Servo 2 pieces)
Motor: Brushlessmotor 2824/MS(sport)
Battery: Lipo 3-cell.800mAh (LightStorm)
Control: 3CH (a motor, V tail: 2servo)

Original Pterodactyle did not fly by a lack of power with Lipo 2cell 7.4V. It flew powerful by Lipo 3cell 11.6V. However, it was not able to be controlled well. 
Then, I lengthened both feet of Pterodactyle in order to raise an elevon function

But, I was not able to get good control of Pterodactyle due to reasons of the following
1) The tail assembly having entered in a slipstream of wing flapping, 
2) A flutterring having risen in the tail (foot) by influence of wing flapping,
3)So wing conflicts in linkage of a hind leg,
the movement of a servo not being transmitted in a moving blade well.

Thus I improved it.
1) I turned hind legs into carbon pipes (diameter 5.5mm) and eliminated flutter ring of tail(foot)
2) I removed linkage by a direct application of ruddavator (foot to a servo.
3) I changed it to V tail from Elevon.
4) I set the tail not to be in an after slipstream of flapping and almost to be in wind of center of furesage

By the above-mentioned improvement, the control became good.

A flight of Pterodactyle was powerful, and it gets possible to fly in the sky freely and agilely.

Shop where I purchased this Ornithopter OVIRC in France
Maker : Hobby Technik in USA