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Rubber band powered planes
Easy to use:
Wind up the propeller by turning it clockwise. Increase the numbers of rotations gradually from one flight to the next to a maximum of 150. Tip: hold the plane vertically downwards for the first few turns in order to switch off the free-wheel in the propeller. Hold the plane level, point the nose at an upward angle and launch into the wind with a firm throw.
Anleitung Gummimotorflieger