Originally Posted by Andy2No
Was that one one cell? If so, that's impressive.
80g on ~3A.
There's a rewound version good for 70g on 2.4A which has better efficiency - over 8 grams per watt.
The price is steep, though. The HP03TR is $30+ from many vendors, and the Didel gears are easily $10 in themselves. (Does anyone know if the rcbearings ball bearings are equivalent to the Homefly stuff? They're certainly less expensive...)
You need a good ESC, too. The XP-3A has high losses and can't handle the power required, while the XP-7a doesn't work well on one cell. The YGE-4L and Micro Invent stuff is good, but it's also $50.
So, all things considered, easily $100 with ESC for the power system.