Better to build yourself 
cheaper and more configurable / serviceable . A 250mm class racer that can be lifted by a gopro can be built for around PLN 400. The smaller ones are similar. The disadvantage is that such a set is too powerful to fly in a room. These brush micromotors are interesting - they have coreless rotors and the permanent magnet is inside, not outside the rotor.
cheaper and more configurable / serviceable . A 250mm class racer that can be lifted by a gopro can be built for around PLN 400. The smaller ones are similar. The disadvantage is that such a set is too powerful to fly in a room. These brush micromotors are interesting - they have coreless rotors and the permanent magnet is inside, not outside the rotor.
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). But maybe that's a good thing, because its motors are over 100W each, plus carbon propellers without any covers ... it was really a flying mower - it started and loaded easily in tall grass, mowing it beautifully.