Helicopters

The helicopter has been aptly described as 'the toy that grew up'. It really did begin as a toy, for the first really successful helicopter was a model made by two Frenchmen in the eighteenth century. It comprised two sets of blades which rotated under the power of an unwinding string, and it was the first heavier-than-air powered machine known to have made a successful flight. Helicopters is a fascinating, colourful and fact-packed guide.
Each aircraft is covered in detail, with anno