Jako nie znawca mogę pomylić obrazki ze śmigłami.
@greatgonzo wyjaśnił co nieco w prosty sposób jak na niego.
To jeszcze kilka słów nieodżałowanego Edgara Brooksa:
From quite early in the war, all Rotol propellors were made from wood, either Jablo, Hydulignum, or (rarely) Weybridge Wood. However, the wood would not have been seen, so there's no need to have a weathered prop showing wood grain. Often the wood was covered by a fine metal mesh, then coated in one of three different (black) plastics, Rotoloid, Rayoid, or Schwartz. The leading edges of the blades had a brass sheath, which was still covered by the plastic. The plastic would dull, with weathering, and the l/e sheath could become visible (more at the tip than the hub,) as well, but, when it got that far, the prop was due for repair/refurbishment (remember that any wear/chipping could adversely affect the propellor's balance.)
Myślę że nie ma problemu z przeczytaniem tekstu.
Fotka od lat krążąca po internecie:
I
I to tyle.