Liberty Ducted Quad
This is an experiment I did for the Liberty Science Center, which ended up being a real fun LOS quad. This is a true ducted fan design, with super tight tolerances and a lot of extra thrust compared to a bare setup – it'll hover at 25% throttle on 4s despite an AUW of 640 grams.
The LDQ takes 4" props. The ducts come without guards on top. The guards are meant to keep out netting, and don't do much else aside from getting tangled with the props in hard crashes and making prop changes super annoying. If you would like the guards just add a note to your order.
The ducts will be printed to order, so expect 1-2 day delays before shipping.
Read more about it here.