The first 4 FlyTech BladestarTM designs were all different configurations of rotors and motors, but #5 and #6 (pictured here) used the configuration pictured here. It's very heavy at 18 grams (0.63 ounces), and also quite large, around 45cm (17.7 inches) in diameter.

Underside of FlyTech Bladestar #6. Shows two small washers added for gyroscopic stability, later replaced by aluminum foil.

FlyTech Bladestar #7. This one is much smaller than #6 -- only weighs 6 grams (0.2 ounces) and 25 cm (9.8 inches) in diameter.

Underside of FlyTech Bladestar #7. You can see how tiny the battery and brains are.

FlyTech Bladestar #7.

Another view of FlyTech Bladestar #7. This one was later retrofitted to be able to detect the ceiling, making it the first semi-autonomous flyer.

Early circuit board used in FlyTech Bladestar #8. Powered by an Atmel Tiny chip. It’s only 20mm (0.8 inches) in diameter!

FlyTech Bladestar #8 with second revision brain, larger motors, and battery. Weighs 10 grams (0.353 ounces) and flight times over 11 minutes on a charge!

The underside of FlyTech Bladestar #8.

FlyTech Bladestar #9 was the first one to get a body and proper brain with a new pcb. First time both ceiling and side sensors are operational.

Early computer rendering of the final design.

Computer rendering of the carrying case design.

Computer rendering to testing out some different wing patterns.

First fitting for the carrying case – note the battery holder on the left-hand side, a little-known feature!

Finalizing the remote controller design. This version has more buttons than the final product.

Final product ready to take flight!