What is bore and stroke length?

Bore-Stroke Ratio is the ratio between the dimensions of the engine cylinder bore diameter to its piston stroke-length. The cylinder bore diameter divided by the stroke-length gives the Bore-to-Stroke ratio. The ‘Bore-stroke ratio’ is an important factor which determines engine’s power & torque characteristics.

What is Stokes law find the expression for it?

Stokes law states that the force that retards a sphere moving through a viscous fluid is directly proportional to the velocity and radius of the sphere and the viscosity of the fluid. Sir George G Stokes gave the formula as : F = 6 ∩rv. where F is retarding force.

What is Stokes law used for?

Knowing the terminal velocity, the size and density of the sphere, and the density of the liquid, Stokes’ law can be used to calculate the viscosity of the fluid. A series of steel ball bearings of different diameters are normally used in the classic experiment to improve the accuracy of the calculation.

What is stroke length in press machine?

The stroke length of a press machine is selected depending on the details of the job at hand. In blanking formation, the stroke length is short being on the order of 10 to 80mm. Therefore, in manual operations, a stroke length of more than 2.5 times the product height becomes necessary.

How is engine performance calculated?

Engine horsepower is measured using a dynamometer, but what the dynamometer really does is measure the torque output of the engine, as well as the RPM – or “revolutions per minute”. These numbers are plugged into a formula (torque x RPM / 5,252) to determine the horsepower.

How do you calculate the indicated power of a 4 stroke engine?

Power in kW = (Pm LAN/n 100)/60 in bar where Pm = mean effective pressure L = length of the stroke in m A = area of the piston in m2 N = Rotational speed of engine RPM n= number of revolutions required to complete one engine cycle n= 1 (for two stroke engine) n= 2 (for four stroke engine) Thus we can see that for a …

What is stroke length?

The stroke length is how far the piston travels in the cylinder, which is determined by the cranks on the crankshaft. This number is multiplied by the number of cylinders in the engine, to determine the total displacement.