Why were oared ships abandoned for sail in early modern period?

by lovecraft25

Oared ships had an obvious advantage of not being at the winds mercy of the wind. Other than obvious advantages such as smaller crew and more space for cannon/cargo, what is the comprehensive list of reasons for the change? Thanks.

jschooltiger

I'm not sure there's any such thing as a "comprehensive list" of reasons for the change, but here are some things to keep in mind. Please note that I am speaking from a northwestern European perspective in terms of technique.

  • First off, there wasn't a wholesale abandonment of oars for sail in any period. Many sailing ships still carried oars (often called "sweeps") for moving around in harbor or other applications.
  • Conversely, many of what we think of as primarily oar-powered ships (galleons, Viking ships, etc.) used sails for a large portion of their voyages.
  • Rowing a ship to propel it is HARD. Like, amazingly hard. It takes a very large crew to do that with any speed.

So moving to sail does a couple of things: first, it lets you move the ship around without a very large crew (because the wind does the work); second, it lets you have a wider ship (oared ships tend to be narrow, to have less surface area to push around).

The move to sailing ships in northwest Europe also coincided with a shift from clinker-built ships (where hull strakes overlap one another) to carvel-built ships (where hull timbers butt up against one another). Relatively speaking, carvel building is cheaper than clinker building because it uses less timber and less time. With a cheaper ship and a cheaper crew (because fewer skilled oarsmen), trade became cheaper as well, and the disadvantage of the ship not handling well in the wind because easier to justify from a cost basis.