Model or a propeller. Model of a four-leaved screw that can be changed in a double-leaf. The hub has a coupling piece with a ridge on the front, indicating that the screw could be disconnected without the propeller shaft. The front screw is loose on a thread on the hub with just enough play to rotate ninety degrees; The rear screw is secured with a pin by the hub. The pitch is cm. Scale 1:20 (estimation).

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Size: 3000px × 2260px
Photo credit: © BTEU/RKMLGE / Alamy / Afripics
License: Licensed
Model Released: No

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