Trundle wheel. This is used to measure approximate distances across large pieces of ground. The wheel has a circumference of one metre. It is pushed along the ground,so moves one metre for each revolution (assuming no slip). A device counts the number of revolutions and hence the distance covered. This is a simplified version of a surveyor's wheel | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library |
Bildgröße: | 4335 px × 4335 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |