I'd like to share a project I've been busy with for the past months. It's a lightweight, small size quadcopter built for long flight time. The AUW of the quad is 85g, and uses geared propulsion with micro DC motors. Controlled by a F4 brushed flight controller, and using a 300mah 2S lipo battery. With this configuration it achieves around 10 mins flight time, which could be further increased with a redesign of some structural parts focusing further on weight-reduction.
The quadcopter is quite stable and responsive for it's weight and size, and is also suitable for indoor flying. I've designed and 3D printed all structural parts for this quad, including the motor and prop holding assemblies and main body. The arms themselves are build out of unidirectional carbon fiber tubing.
I've got some more photos and characteristics up on my blog, so if you like this check it out.
I'll be posting a flight video of this quad sometime soon, so stay tuned! Needless to say, if you have any ideas or comments I'd love to hear from you.