Construction
Viking ships varied from others of the period, being generally more seaworthy and lighter. This was achieved through use of clinker (lapstrake) construction. The planks from which Viking vessels were constructed were rived (split) from large, old-growth trees—especially oaks. A ship's hull could be as thin as one inch (2.5 CM), as a split plank is stronger than a sawed plank found in later craft.
Working up from a stout oaken keel, the shipwrights would rivet the planks together using wrought iron rivets and roves. Ribs maintained the shape of the hull sides, but were not intended to provide strength to the hull. Each tier of planks overlapped the one below, and waterproof caulking was used between planks to create a strong but supple hull.
Remarkably large vessels could be constructed using traditional clinker construction. Dragon-ships carrying 100 warriors were not uncommon.
Furthermore, during the early Viking Age, oar ports replaced rowlocks, allowing oars to be stored while the ship was at sail and to provide better angles for rowing. The largest ships of the era could travel five to six knots using oar power and a hasty ten knots with the sail erect.
Read more about this topic: Viking Ships
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