I remade the video using better brightness adjustments below. I also received a reply from the FlyFly designer, called Ricky, confirming the symmetrical rotor and blade chord. An excerpt from his reply is below with some spelling corrections. While the FlyFly rotor does work fine, as shown in the video, it can be replaced with a more efficient [link=http://www.ejf.com/index.php?main_page=product_info&cPath=82_79&produ cts_id=538]Midi Fan 90mm Rotor[/link], if desired for $37, until the newer FlyFly rotors become available.
The current blade are symmetrical design. However, we aware that the 7 blade
may not be the best combination even the high torque motor available in the
market. So we are considering to change the no of blade to 6. Another issue
is the width on the tip of the blade will be modified to a bit narrow. We
have been tested the current draw will be less by this modification.
We are very appreciated to hearing any feedback from customers so we have
more input and improve our products better.
[link=http://www.gregcovey.com/reviews/FlyFlyBAeHawk2.wmv]FlyFly BAe Hawk Flight Video (Light Adjusted)[/link] (21.5meg)