Model of A Four-Blade Propeller, Petrus van der Loo, 1847 instruction model Model of a regular four -leaf screw in a frame on a ground board; four-leaf version of NG-MC-555. The blades are flat. The screw can be turned around with a crank. The model has a 216 mm rush, a diameter of 173 mm, the hub is 40 mm long and has a diameter of 25 mm. Scale 1:10 (derived). The Hague wood (plant material)

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Size: 5886px × 4872px
Photo credit: © piemags/rmn / Alamy / Afripics
License: Licensed
Model Released: No

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