The static compression ratio in a piston engine is the ratio between the volume of the combustion chamber when the piston in the cylinder is at the bottom of its stroke and the volume of the combustion chamber when the piston is at the top of its stroke. It can be expressed as
CR = (Vd + Vc) / Vc
= (π d2 s / 4 + Vc) / Vc (1)
CR = compression ratio
Vd = piston displacement volume - total volume swept by the piston (cm3, in3)
Vc = clearence volume - volume left in the cylinder when the pistion is at the top dead center (cm3, in3)
d = piston diameter (cm, in)
s = piston stroke (cm, in)
Engineering related topics like Beaufort Wind Scale, CE-marking, drawing standards and more.
Maximum wire lengths vs. currents in the 12 volt electrical system of a car.
Maximum length of copper wire with 2% voltage drop.
Converting between units of acceleration.
Distance traveled vs. time used.
Power, torque, efficiency and wheel force acting on a car.
Adhesion and tractive force between car wheel and surface.
Car acceleration calculator.
Calculate fuel consumption in liter per km - consumption chart and calculator.
Calculate and compare the costs between owning a new vs. an old car.
Forces due to circular motion and centripetal / centrifugal acceleration.
Calculator for CO2 emissions from different kind of cars (gasoline, diesel, LPG, electrical), comparing with alternative forms of transportation (as airplane, bus and train).
The ratio of compressed air pressure to free air pressure.
The drag coefficient quantifies the drag or resistance of an object in a fluid environment.
EV Charging - AC vs. DC, single phase vs. three phase and power vs. voltage and amps.
Properties like freezing point, viscosity, specific gravity and specific heat of ethylene glycol based heat-transfer fluids, or brines.
Exhaust ventilation from garages and workshops.
Impact forces acting on falling objects hitting the ground, cars crashing and similar cases.
Calculate piston engine displacement.
Mean Time Between Failure - MTB and reliability of machine components and systems.
Rolling friction and rolling resistance.
Speed (km/h) vs. time (hours) and distance traveled (km).
Traffic flow and density as used in highway design.