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Outboard motor shaft lengths are standardized to fit 15-, 20- and 25-inch (38-, 51- and 64-centimeter) transoms. If the shaft is too long it will extend farther into the water than necessary creating drag, which will impair performance and fuel economy. If the shaft is too short, the motor will be prone to ventilation.
It is defined as the pressure exerted by a column of water of 1 inch in height at defined conditions. At a temperature of 4 °C (39.2 °F) pure water has its highest density (1000 kg/m 3). At that temperature and assuming the standard acceleration of gravity, 1 inAq is approximately 249.082 pascals (0.0361263 psi). [2]
The power-to-weight ratio (specific power) is defined as the power generated by the engine(s) divided by the mass. In this context, the term "weight" can be considered a misnomer, as it colloquially refers to mass.
The parent of all mercury pressure gauges is the mercury barometer invented by Evangelista Torricelli in 1643. [15] An early engineering application of the mercury pressure gauge was to measure pressure in steam boilers during the age of steam. The first use on steam engines was by James Watt while developing the Watt steam engine between 1763 ...
Example of the widely used Bourdon pressure gauge Checking tire pressure with a spring and piston tire-pressure gauge. Pressure measurement is the measurement of an applied force by a fluid (liquid or gas) on a surface. Pressure is typically measured in units of force per unit of surface area.
The Seagull outboard motor had a simple single cylinder water-cooled two-stroke engine. Atop the unshrouded engine was a magneto, and on its port side a simple carburetter with no air filter. (Even a rudimentary rubber "storm cowl" was an optional extra, and induction noise when running was pronounced).
The Sun 2500 is a recreational sailboat, built predominantly of polyester fiberglass. The hull is made from solid fiberglass, while the deck is a balsa-fiberglass sandwich. It has a 9/10 fractional sloop rig, with a deck-stepped mast, a single set of swept spreaders and aluminum spars with continuous stainless steel wire rigging.
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