This is the final prototype for our 3D-printed folding 250 quad, based on corrections to the last version, seen below. Full frame is under 70 grams, flies free of jello. The landing gear is folding and replaceable, designed to give the exact clearance for a Gopro while acting as mechanical fuses in impact. bottom picture is the final version next to the already flown previous version. The whole thing folds to 10*10 cm and will fit in any pocket without props.
I'll be submitting my application to MIT in a few days....One crazy roll of the dice trying to break the dice!

This is a very compact and robust quad designed and built by me and another Chinese student that will fit snugly in a large pocket. Hasn't flown yet since the motors are still shipping, but it feels very sturdy and should be rigid enough to stay stable at high throttle, and don't worry about the joints, they'll be fastened with aluminum screws and bolts. The quad is designed to house a pixhawk with cover removed(there will be a protective roof) and carry a mobius or an HD19 or a Gopro.  Still needs a bit polishing and slight bug fixes, will weigh around 35 grams with skids when finished. But that's after I kill the December SAT test:). I love this hobby but still I need to get to college:). A special thanks to the wonderful community at DiyDrones, it is something that I cannot experience around in China.

So today me and some other students were sitting in the workshop with nothing to do- bad weather canceled our routine flight. Seeing all the Lego mindstorm pieces sitting around, we decided to do something fun:

Try to ignore the horrible wiring   :）

Though we still couldn't get into the air today cause we ran out of props:(

Water wasn't supposed to have touched the lenses- we had a nice little retract built in, but that's all useless when you forget to use it:) Take-off was fully manual to prevent FBWA from attempting to correct the roll and cause uneven drag on the floats leading to out-of-control spins. The current camera is a HD19+ from Boscam, and will be converted to support NIR photography.

This drone was built by 4 Chinese students of Zhejiang Province Hangzhou No.2 middle school, under the financial support and supervision of the local Environment Protection Technology Department. This is its maiden flight, doing a simulated automated pass over a local bottled water plant, so although it flies a bit awkward right now due to unbalanced floats, it can already complete its mission without difficulties. The aircraft will be optimized to mount infrared sensors to help monitor illegal sludge dumping and Harmful Algae Blooms, which currently plague the lake in the video, Lake Qiandao,aka Thousand Islands lake. The lake is a man-made lake sitting in a mountain basin, and is an important source of income for the region, which relies completely on fishing and tourism.

The students who created this project are currently looking forward to college education in the United States. We appreciate any feedback and suggestions, as the local government is impressed with our results and is preparing to have our work further developed and deployed at similar sites province-wide.