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It was a four-seat twin-engined commercial flying boat. [1] While primarily intended for landing and taking off from the water, the Cutty Sark could also make occasional use of land-based facilities, for which purpose the manufacturer could supply an amphibian gear that would attach to various fixing points that were present upon on the ...
A limber hole is a drain hole through a frame or other structural member of a boat designed to prevent water from accumulating against one side of the frame, and allowing it to drain toward the bilge. Limber holes are common in the bilges of wooden boats. The term may be extended to cover drain holes in floors.
Aluminum and aluminum alloys are used both in sheet form for all-metal hulls or for isolated structural members. Many sailing spars are frequently made of aluminium after 1960. It is the lightest material for building large boats (being 15–20% lighter than polyester and 30% lighter than steel).
Hand-forging a nail, including use of a nail-header Partly mechanised boat nail production in Hainan, China. In hand-working of nails, a smith works an approximately conical iron pin tapering to a point. This is then inserted into a nail-header (also known as a nail-plate), essentially a plate of iron with a small hole in it.
The edges of the hole may be flanged to increase the rigidity and strength of the component. [1] The holes can be circular, triangular, elliptical, or rectangular and should have rounded edges, but they should never have sharp corners, to avoid the risk of stress risers, and they must not be too close to the edge of a structural component. [2] [3]
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