Stirling engine Rainer with centrifugal governor material kit

Bengs Modellbau

€342.00*

Prices incl. VAT plus shipping costs

2 Reviews

Available, delivery time: 2-5 days

Product number: 2280

EAN: 4262412150292

Product information "Stirling engine Rainer with centrifugal governor material kit"

The original

Britain, America and France had introduced several notable hot air engines by 1850. Surprisingly, Germany had not produced any significant innovations in this area up to this point, it was not until 1867 that the German Wilhelm Lehmann produced a significant innovation in the field of hot air machines. A late innovation, but an impressive one: the Lehmann air expansion engine!

The model Stirling engine

Rainer The model of the Lehmann Stirling engine has a total length of 285 millimeters. When designing our Stirling engine, we tried to keep it as close to the original as possible. However, it is not a 100% copy of the original. Our model is operated with an alcohol burner. The burner is firmly screwed to the oak base plate. The cooling jacket, which was a solid casting in the original, is assembled from several milled brass parts and soft-soldered. Just like the original Lehmann Stirling engine, the model has a functional centrifugal governor that can regulate the speed of the hot air machine. As with the original, the centrifugal governor opens a valve that allows the air in the Stirling's working chamber to escape. The 140 mm diameter flywheel is made from a very clean cast steel. In addition, the Stirling engine has a 48mm pulley that could be used to drive small drive models, for example.

Speed control via centrifugal governor

This Stirling engine has a working centrifugal governor. When the speed is sufficient, the balls of the regulator rise. This moves a lever that operates a valve. If the valve is opened, the working air can escape from the displacement cylinder. Due to the reduced pressure, the Stirling process no longer works optimally and the engine reduces its speed. To set the desired speed, you can adjust the spring tension of the valve using a handwheel during operation.

Dimensions of the model Stirling engine

Base plate: 255mm x 120mm
Flywheel: 140mm
Pulley: 48mm
Total height: 210mm
Working piston: 28mm
Displacer piston: 25mm
Length overall: 285mm

The “Rainer” Stirling engine material kit is included in delivery

Wooden base plate
Finished milled parts
Brass, steel, stainless steel and silver steel
Raw material for the turned parts
Cylinder sleeve made of precision tube
flywheel
All required screws, nuts, gaskets, grub screws and wick
Construction plan model Stirling "Rainer" drawings (14 sheets) and construction instructions (9 sheets)

Manufacturer "Bengs Modellbau"

Bengs Modellbau

Im Kirchfelde 6

31675 Bückeburg

info@bengs-modellbau.de

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6 March 2024 10:49

Gratuliere, wunderschönes Modell, kommt auf meine ToDo-Liste. HaJo

13 August 2024 16:44

Toller Materialbausatz

Gut durchdacht und auch auf einer kleinen Drehbank (Sieg C2) machbar. Wenn ich den Motor nochmal bauen sollte, würde ich ein paar Kleinigkeiten anders machen: - Die Weichlötungen würde ich durch Verklebungen mit Hochtemperatur-Epoxidharz ersetzen, ist einfacher in der Handhabung. - Im Verdrängerkolben eine kleine Druckausgleichsbohrung (1,5mm) vorne, ich habe sie nachträglich angebracht - Die Verdrängerwelle würde ich aus Sechskant- oder auch Vierkant-Material herstellen, man erspart sich die Planfräsung für die Gabel des Verdrängerkolbens. - Gabel und Abstandshalter für den Verdrängerkolben würde ich nicht mit Gewinde versehen, sondern mit Zapfen und Bohrung, die dann verklebt oder auch verlötet werden, ist einfacher zu justieren.