Model Of Steam Engine Sectional, to enable all moving parts to be seen clearly. Where required, a simple carburettor is depicted in cross section, & a low voltage bulb is used to simulate action of spark plug. Internal passages are suitably coloured to show nature of gases passing through them. All models are of cast alloy and each is fitted on a base. Locomotive design, sectional, the valve and piston mechanism clearly visible through a glass plate with forward and reverse motions, demonstrates working with an air blower or even with mouth blowing.