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The smallest helicopter
GEN H-4 is the smallest helicopter in the world. Its weight is only 70 kg. Interestingly, this helicopter flies 3 times heavier than itself, i.e. up to 210 kg.
The smallest helicopter
GEN H-4 is the smallest helicopter in the world. Its weight is only 70 kg. Interestingly, this helicopter flies 3 times heavier than itself, i.e. up to 210 kg.