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Rufus, our model is a model of a thermo-acoustic Stirling (Lamina Flow Stirling). From the construction of thermo-acoustic Stirling engine is very simple. The working piston is moved by a thermoacoustic effect on Rufus.

A thermoacoustic effect occurs when air is heated in a tube and using an excitation source (eg, steel wool is suggested) to vibrate, so that the tube is formed in a standing wave (Rijke tube). As with the Stirling engine, there are here is the cycle of expansions and contractions of air (gas).
A comparison with the Stirling engine is too far given, as it is a closed system, but is omitted for the thermo-acoustic Stirling on a displacer. This makes the design of the engine makes that easy.

The lamina flow stirling engine Rufus runs silently approaching. It is heated with a small burner that is feels with alcohol. The working piston is made of graphite and does not need to be lubricated.

The material kit of the Stirling engine "Laura" is designed according to the well-known principle of Bengs Modellbau. All milled parts are prepared in a way that they just have to be deburred and drilled - if necessary. The turning parts are raw. The flywheel is preturned and milled that far that it can be finished even on a small turning lathe.

-Finish-machined milled
-Raw material for the turn parts and graphite piston
-Raw material flywheel (aluminum)
-Milled-wood base
-Material for the burner
-All necessary screws, nuts, glass tubes, fiberglass wick, ball bearings and O-rings
-Stirling engine Rufus blueprint drawings (6 sheets) and instructions (2 sheets) (German or frensch)

Base plate: 170mm x 100mm
Flywheel: 60mm
Overall height: 88mm
Overall length: 255mm
Piston (graphite): 18mm



The construction of the thermo-acoustic Stirling Engine Material rate Rufus will be a small lathe (min. Opti D180 x 300), a small drill and a gas burner benötigt. Otherwise a Burner for soft soldering are still hand tools, which should be in every "Steam Engine Workshop", (M2 Taps, Reamers 3H7, 6H7, files, drill bit, a thread locking compound) needed.