WANKEL ENGINE 1361
The model demonstrates the principle operation. It is cut way to show the internal constructional details. Unlike other engines the rotary piston engine avoids reciprocating parts. The power piston is an arch like triangular rotar which on rotating generates an epitrechoid. Mounted on base, with printed diagram showing working.

HERO'S ENGINE (EOLIPILE) 1364
A functional glass model of the earliest form of steam turbine. Comprising a borosilicate glass bulb 70 mm diameter approximately, with side arms bent at right angles and formed into jets at their tips. The bulb is carried upon a metal stand which leaves it free to rotate about its horizontal axis. If about 25 to 30 cm3 of water are introduced into the bulb and boiled the issuing steam causes rapid rotation. Supplied complete on stand but WITHOUT burner. Dimensions of base 180 x 120 mm.
A. Spare glass Bulb for above.
B. As above, but supplied with wooden stand.

SOLAR CELL AND MOTOR 1365
Solar High-power silicon cell converts light directly into electricity to operate motor. Exceptionally high output, 1/2 V with 40 to 50 milliamperes current output in bright sunlight. Solar cell approximately 6.4cm2 with plastic diffusing lens and protective mounting. Motor with special anti-friction bearings revolves 20 to 400 times per minute in bright light with small propeller attached to shaft.

TURBINE/PUMP UNIT 1366
Comprising a rotor 40mm diameter has eight bucket blades and is housed in a block turbine chamber 50x50x25 mm, with a clear Perspex front. Two inlet tubules (for turbine and pump operation respectively) and one outlet tubule are provided and the shaft carries a 15 mm diameter pulley.

DEMONSTRATION GAS ENGINE 4 STROKE 1367
A one cylinder, 4 cycled and double valve system gas engine, showing all the operations including intake, compression, explosion, exhaust, advanced and retarded spark etc. A lamp (3 volts) indicates the spark plug, with battery, fitted on wooden polished base. Overall Dimensions: 250 x 140 x 150 mm length x width x height approx.

DIESEL ENGINE 1368
All parts made in aluminium alloy and gun metal. Ignition is shown by means of a miniature bulb. Fuel supply also sectioned. With crank handle for manual operation. Fitted on polished wooden base. Overall height about 43cm.

STEAM ENGINE SECTIONAL DEMONSTRATION MODEL 1369
Locomotive design showing cross section of the piston and sliding valve as positioned in the steam chamber (cylinder), clearly visible through air tight glass front and movement of these parts are smooth enough to demonstrate working even by blowing. Other parts are also clearly visible such as crank-shaft, valve control, drive wheel etc. All brass parts (except fly wheel) are C.F, mounted on heavy metal base synthetic hammer finish. Overall dimensions: 375 x 95 x 160 mm length x width x height approx.

STEAM ENGINE FACTORY MODEL 1370
Capable of running a small dynamo to light the lamp with the help of its fly wheel and driving gear. Complete-with pressure gauge, whistle and safety valve. The model is mounted on thick metal sheet base synthetic hammer finish. Overall Dimensions: 410 x 325 x 370 mm length x width x height approx.

STEAM ENGINE (SMALL) 1371
Demonstration working model with oscillating cylinder, safety valve and whistle, mounted on metal base with spirit lamp with wick. Overall Dimensions: 195 x 145 x 170 mm length x width x height approx.
The above list does not include the entire range of instruments available, please feel free to request other items throughout this field.

HERO’S ENGINE 1372-a
Illustrates the principles behind the world's oldest steam engine. It is constructed of sturdy metal and is supported by a weighted stand that eliminates the problems of hanging chains and breakable glass flasks. Fill half full of water and gently heat with Bunsen burner to observe rotation as steam escapes from the jets mounted on the sides of the boiler.