Engine power is measured in ‘Horsepower’ because of a Scottish engineer named James Watt. According to Watt’s observations, 1 horsepower = 33,000 foot-pounds of work per minute. The value of horsepower was clearly not absolute, but that didn’t really matter Read more…
Consequently, new marine propulsion engines have been developed over the past several years that are designed to be more powerful and efficient. Wärtsilä- 31 DF, regarded as the most powerful engine in the world. Engines that deploy an enormous amount Read more…
A brake horsepower is defined as the external power supplied to the pump through the shaft. A water horsepower is defined as part of the shaft power that is actually delivered to the fluid. The pump efficiency is defined as Read more…
The horsepower and torque figures that automotive manufacturers advertise for their vehicles are always crank numbers. Crank numbers are the HP and Torque values as measured at the engine. To see these values, an engine must be connected to an Read more…
One SAE hp is the ability to lift 33,000 lbs one foot in one minute. One DIN hp (DIN stands for “Deutsche Industrie Normen” or “German Industrial Standard”) is the ability to lift 450000 kg one cm in one minute. Read more…
What is the horsepower of my boat’s motor? The horsepower is usually painted in large numbers on the motor itself. Sometimes the horsepower is part of the model code. If you are unsure check the manual or ask your repairer. Read more…
Metric horsepower is 75 m kgf/s, which equals 735.49875 watts. On the other hand, imperial horsepower is exactly 746 watts. While watts are the SI unit of measurement for power, the amount of power generated by most large machines is Read more…
[3] In the US customary system of measurement, which is non-coherent, the unit of power is the horsepower, which is defined as 550 foot-pounds per second (the pound in this context being the pound-force); similarly the gallon is not equal Read more…
1972. After 1972, an engines power output was quoted as “net horsepower,” and just like “gross horsepower,” it was measured at the crankshaft, so it too does not take into account drivetrain losses. When did net horsepower come out? In Read more…
The Standard Association of Australia (SAA) adopted the Systeme International d’Unites (SI) in 1977 which determines the unit of power is best expressed as a kilowatt. One kilowatt is equivalent to 1.34 horsepower. To determine what a kilowatt is from Read more…