How many degrees are there in the angle on either side of a straight line?
Straight-three engine Straight-three engine A straight-three engine, also known as an inline-triple, or inline-three (abbreviated I3 or L3), is a reciprocating piston internal combustion engine with three cylinders arranged in a straight line or plane, side by side. Straight-three engines generally employ a crank angle of 120°. This gives perfect first and second order balance on reciprocating mass, but an end-to-end rocking motion is induced because there is no symmetry in the piston velocities about the middle piston. The use of a balance shaft reduces this undesirable effect. An inline three-cylinder engine with 180° crankshaft can be found in early examples of
Pressure angle force along the pitch line which is responsible for power transmission is proportional to the cosine of pressure angle. The one which exerts thrust (perpendicular to the pitch line) is proportional to the sine of pressure angle. So it is advised to keep the pressure angle low. Standard pressure angles are 14.5 and 20 degrees. Just as there are three types of profile angle, there are three types of corresponding pressure angle: the transverse pressure angle, the normal pressure angle, and the axial pressure angle. Pressure angle Pressure angle in relation to gear teeth, also known as the angle of