The Stirling Engine - AstroMedia
The revolutionary concept of this hot air engine was invented as early as 1816 by the Scottish priest Robert Stirling. Fully functional, it runs for up to 20 minutes on a cup of coffee.
The principle is as ingenious as it is simple: in a sealed cylinder heated on its underside, a piston pushes the enclosed air back and forth between the hot and cold sides. The air expands and contracts each time, and this is converted into a rotary motion via a working piston and a crankshaft.Any heat or cold source that can be used to generate a temperature difference serves as the energy source - from open fires to solar energy to otherwise unused heat or cold.
Tip: Place the Stirling engine on a cup of boiling hot coffee (tea or water will do, of course), give the flywheel a little push to the left, and the frugal device begins to stomp quietly - for up to an hour! But that's not all: place it on a cold compress or a cold pack from the freezer and turn the flywheel to the right. Here it stomps even longer.
Here are some customer videos.
You can find a detailed illustrated building report here.
| Aspiration scale: | Challenging |
|---|---|
| Time Line: | 30 Hours |
4 pre-punched and printed sheets of construction cardboard, DIN A4
including accessories:
1 plate made of aluminum sheet, Ø 126 mm (base of the main cylinder)
1 plate made of aluminum sheet, 126 x 126 mm (cover of the main cylinder)
2 strips of PVC film, 182 x 18 x 0.5 mm, transparent (wall of the main cylinder)
1 disc made of foam, Ø 113 x 8 mm (displacement piston)
2 tubes made of brass, 2 mm (OD) x 1 mm (ID) x 18 mm
3 pieces of wire made of spring steel, Ø 1 mm, 3 x 41 mm, bent (piston rods)
1 piece of wire made of spring steel, Ø 1.5 mm, 117 x 6 x 6 mm, with two offsets (crankshaft)
4 perforated discs made of Hard PVC, 20 mm (OD) x 1.5 mm (ID) x 1 mm, white
8 perforated discs made of hard PVC, 8 mm (OD) x 1.5 mm (ID) x 1 mm, white
1 silicone hose, 3 mm (OD) x 0.8 mm (ID) x 110 mm, transparent
1 latex glove
detailed assembly instructions
Dimensions of the built article: approx. 16.5 x 12.6 x 12.6 cm
Construction time: approx. 30 hours
Distributor:
PGI-Skarabäus, Im Kränzliacker 9, 79576 Weil am Rhein, Germany, pgi-shop.de
PGI-Skarabäus, Lerchenstrasse 38, 4147 Aesch, Switzerland, pgi-shop.ch
Manufacturer: AstroMedia GmbH, Im Wirrigen 30, 45731 Waltrop, Germany, astromedia.de
Adult supervision:
Children under 14 years of age should only use the kit under adult supervision to avoid risks from improper handling.
Be careful with small parts:
Hazard of suffocation! Keep small parts out of the reach of small children.
Risk of injury:
Be particularly careful when handling pointed and sharp parts! Use sharp tools carefully, if necessary take appropriate safety measures to avoid injury.
Do not touch the main cylinder (aluminum plates) during and after operation until it has cooled down completely. Keep children and unauthorized persons away from it during operation.
Fire hazard:
Be careful with open fire and heat sources. Product contains highly flammable materials. Never leave unattended when in use.
Use of adhesive:
When using adhesive, follow the manufacturer's safety instructions. Work in well-ventilated rooms and avoid skin or eye contact.
Intended use:
The kit may only be used in accordance with the enclosed instructions. Independent modifications can affect the functionality and safety of the built model.
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