Boats
Boats and Boatbuilding INTRODUCTION
BASICS OF BOAT DESIGN
Buoyancy and Weight
Trim and Stability
Structure
Watertightness

SKIN AND BARK BOATS

WOODEN BOATS
Lapstrake Construction
Carvel Construction
Plywood Construction

CANVAS-COVERED BOATS
ALUMINUM BOATS
FERROCEMENT BOATS
FIBERGLASS BOATS
MEASURING AND MODELING
The Half-Model
Lift Models and Lofting

BOAT PROPULSION
Inboard Motors
Outboard Motors
Water-Jet Drive
Surface-Piercing Propeller

Motor-Boat Racing
Rowing
Yachting

Ships
THE EARLIEST SHIPS
Earliest Sailing Vessels
Galleys
Biremes
Triremes
Roman Galleys
Dromons
Lateen-Rigged Ships
Junks
Viking Ships
Cog
Carrack
Caravel
Galleon
East Indiamen
Ships of the Line
Frigates, Sloops, and Brigs
Clippers
Last Days of Sail
FUEL-POWERED SHIPS
Paddlewheel Steamships
Innovative Ships of the Late 19th Century
The Screw Propeller
Iron and Steel Hulls
Double- and Triple-Expansion Steam Engines
Steam Turbines
Diesel Engines
The Great Ocean Liners
Cruise Ships
Cargo Ships
Container Ships
Roll-On-Roll-Off and LASH Vessels
Tankers
Crude Carriers
Product Tankers
Other Specialized Tankers
Tanker Safety
Fishing Vessels
Trawlers
Seiners
Long Liners
Research Vessels
Hovercraft
The First Nuclear-Powered Vessels
Naval Vessels
Aircraft Carriers
Battleships
Cruisers
Destroyers
Frigates
Mine Craft
NEW TRENDS IN SHIP DESIGN
SUBMARINES
Submersible Craft
Torpedo (weapon)
shiptravel.auuuu.com Index

BOAT PROPULSION


Until the 20th century, boats were propelled by oar and sail (see Sailing), just as they had been since ancient times. Paddles and poles (for pushing against the bottom of the waterway) were variations on the oar suitable for small craft. The rapid rise of the steam engine to dominance among ships did not affect boats until the late 19th century, when steam engines and boilers had become compact enough to fit into a small hull. The age of steam-propelled boats was brief, however, for the advent of commercial internal-combustion engines came within a few years of boat-size steam machinery. By the late 20th century, the internal-combustion engine, either in diesel or spark-ignition (gasoline) form, had become almost universal in boat propulsion, save for sail, oar, and paddle that survive with many types of recreational boats.

Inboard-Outboard Motorboat
Inboard-Outboard Motorboat
Motorboats are popular recreational vehicles, present on many lakes and oceans throughout the world. Inboard-outboard (I/O) motorboats such as this Donzi Z-25 are capable of reaching speeds of 80 kilometers per hour (50 miles per hour).
Boats
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