Check it out in this video:
As most of my projects involve something that moves I just had to partipate in the Make It Move Challenge". Lately I have been experimenting with building RC-blimps based on the balloons sold by Deutschen Zeppelin-Reederei GmbH. These balloons are about 120 cm long and 25 cm in diameter. Filled with helium these balloons lift a mere 20g. But modern micro RC-gear brings this within reach of anyone with some basic experience in building remote controlled models.
A classic gondola setup resulted in a blimp that is quite quick for its size and very agile. But at high power a lot of roll back and forth occurs. Positioning the main thrusters higher, closer to the centre of mass should remedy that. But instead of putting the thrusters on the sides (as in Zeppelin airships rather than blimps), I tried a single propeller at the stern, inspired by Daniel Geerys awesome Hyperblimp. As the complete controls and propulsion are at the stern, an even stricter weight limit is set for these parts (under half of the lift capacity, i.e. 10 g). For this I came up with a setup around the Spektrum AR6400L Ultra Micro Receiver with integrated servo's. The battery goes on the bow.
The result is a lively indoor blimp suitable for spaces the size of a class room or larger. Controlling it in a smaller class room takes some practice (Im still on it). But it doesnt matter if you hit anything, you can just keep flying. Obviously you should avoid all hot, sharp or fragile objects in the room.
You do not need any flying skills, but this project does require a willingness to work with tiny, flimsy components. Some minor soldering is needed to extend the battery leads.
Many thanks for all of your votes in the Make It Move Challenge.