Qing Shuang Stirling Engine steam Engine Physics Experiment Popular Science Invention Toy Model Motor Model Educational Toy Generator Colorful LED, Silver, LxWxH 6.45×3.3×3.8

The media could not be loaded. I bought this because it looked neat and could be used to demonstrate heat and energy concepts for a class I teach. At $20, I didn't expect much, but this little engine runs consistently. I have now purchased 2 of these total. In both cases, the item was very well packaged, complete, and undamaged on delivery. It even includes extra parts which was a lifesaver.There isn't any assembly required other than assembling the alcohol burner and attaching the LED to the generator. The long lead of the LED will go to the terminal with the red dot.Operation: I used 91% alcohol from the drug store as fuel and it works great. It takes 20-30 seconds to get warm enough to allow the engine to sustain itself. It is very satisfying to watch it run.On the first engine, I was using a cigar torch at first to heat the glass cylinder, instead of using the included burner. I knew this was a dumb idea but I didn't have any alcohol at that time. It quickly burned a hole through the glass cyclinder. Thankfully, an extra cylinder is included and after fixing, the engine runs fine.Overall, I am very impressed with the quality of this little engine and would recommend it to anyone with a general curiosity of working machines. If you have kids, they should be supervised. You can see the size of the flame in the video.

The media could not be loaded. Nicely built engine at a reasonable price. Delivered quickly and worked very well right out of the box. In the video you can see it running moderately fast using 70% alcohol. Took about 1 minute to get going after lighting the wick. Guessing it will get going more quickly and run faster on the recommended 95% . Very happy with it.

It works great out the box! Then it breaks down after a little bit as the wick on mine got completely burnt thru in about 30 mins of run time, which as it’s a rope wick it’s kind of bad. Also the heat fins (radiator) are placed directly next to the candle so if the heat fins heat up it stops working. Other than that you can replace wick with twine tied together, and use isopropyl alcohol as fuel! IT IS A GAS GUZZLER!!! But very fun and interesting.

The media could not be loaded. This is a cool little gadget, it will almost put me to sleep sitting watching and listening to it run. Would recommend this.

I bought this for my son's 7th grade science report, works as advertised! Very impressive for the cost and comes with an extra set of rubber bands, glass and bushings.

There is a little tube that connects the chambers that was severed and the machine won’t run. It is eligible for return but what a pain in the ***. Would not recommend

THE COMPANY BUGS TO DISTRACTION! LEAVE ME ALONE! WHAT IF THEY WERE GIFTS? DO YOU WANT A REVIEW FROM ME FAMILY AND FRIENDZ? My God! (you have none), what is wrong with you odd people

The media could not be loaded. Impressive for the value. Don't have anything bad to say all upsides I think this is a great thing for kids to learn about mechanics