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► WARNING:
- must be handled only in the presence of adults.
► Why is it considered a Stirling Thermal Lag engine?
- This is a Stirling engine of the Thermal Lag configuration, characterized by the arrangement of the heat source at the end of the cylinder (test tube), unlike the Acoustic term engine that the flame with heat is in the central region of the engine, between the piston and the test tube.
The small fire torch (oil lamp) that comes with the engine, can be filled with 92.8 INPM alcohol.
My impressions about this engine are very good, due to its simplicity, there are few models of this configuration that reach 2900 rpm, despite its low torque. This high speed, which produces a wonderful sound when rolling the bearings, is enchanting.
It does not require lubrication on the piston, only after a long time, it is interesting to put grease on the joints.
It is also interesting to note, that the engine works in both rotational directions.
► Cautions:
- must be handled by adults only;
- maintain caution to avoid burns;
- use of polished powder graphite on the piston is recommended, if necessary;
- the use of lubricating oil on the piston is not recommended, as it generates friction and problems in operation;
- be careful to avoid breaking the glass cylinder as warned in the video;
- the engine runs with a 92.8 ° INPM alcohol lamp, only the lamp accompanies the product.
► Positive points:
- an incredible rotation given its simplicity;
- does not require maintenance, just fill up and put it to work;
- the piston does not lock inside the cylinder even when it is overheated;
- great cost benefit for the performance offered in comparison to the models of the same value;
- low operating noise, almost imperceptible;
► Negative points:
- low torque;
- the difficulty of handling with the presence of running air (wind);
- just want special care when handling the glass parts, to avoid damage;
► Technical data:
- piston stroke: 15 mm;
- piston external diameter: 12 mm;
- cylinder material: glass;
- hot everything material: tempered glass;
- piston material: glass;
- the engine reaches up to 2900 rpm without load;
► How does a Stirling Thermal Lag engine work?
- This engine works with the difference of internal air pressure, that is, there is a thermal resonance with the displacement of the air between the hot end and the cold end of the cylinder.
► Conclusion:
The engine has a wonderful design, does not require maintenance, ready to run at any time, without the presence of wind. Another beautiful decorative item, I loved the engine!
I want to thank everyone who read this text description of this video, if you have any suggestions or even doubts, leave your comment.
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Leandro Wagner.