A change in any one of the three types of motion affects the other two. Imagine three lines running through an airplane and intersecting at right angles at the airplaneâs center of gravity. 1  Rotation around the front-to-back axis is called roll.  Rotation around the side-to-side axis is called pitch.
A system boiler heats your central heating system directly and produces hot water for your cylinder. A system boiler, just like a regular (conventional) boiler works on the principle of stored hot water.However, a system boiler differs from a regular boiler in some important respects.n example of a central heating and hot water system layout using a system boiler with an open-vented hot water cylinder. View our system boilers. An example of a central heating and hot water system layout using a system boiler with a pressurised unvented hot water cylinder. View our system boilers.
How a Hot Water or Steam Boiler Works. Hot water or steam boilers use a gas or oil fueled boiler to heat water and circulate the water or steam through pipes to radiators, radiant baseboards or piping in floors and walls to warm a home. The system works in the following way.