Sunnytech Hot Air Stirling Engine Colourful LED Single Flywheel Education Toy Electricity Power Generator M14-03-S
Condition: New
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Dec 17 – Dec 18
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Color: Silver
Features
- ATTRACTIVE COLOURFUL LED WITH MOTOR INSTALLED-----The stirling engine equipped with a colorful LED. Because of the heat from high-grade alcohol, the engine will run madly and create the electricity. The power will go through the wire and drive the led light to emit different colors. It's really interesting and imaginative toy.
- EXTREMLY WELL-MADE----The board is made of Russian pine, using fine grinding manufacturing; Stent using mold steel manufacturing, solid and firm; Flywheel, ventilation pistons, aluminum fine cars, fine milling, texture and beauty double combination; Rod made of stainless steel manufacturing; Dynamic link sets of aluminum alloy cylinder, power cylinder and the power piston is SUJ2 material fine grinding surface of special treatment, high hardness. Do not wear high-speed ultra-long-running.
- EASY OPERATION & LONG LASTING----Fill the alcohol burner with your 95% alcohol (we recommend this fuel) and light it. Let the light burn the round ended cylinder for about 20 seconds, then give the wheel a gently push, it will run like a charm. It can run for 8+ hours continuous without any broken which test by one customer.
- STRONG PACKING----Glass tube is packaged separately with bubble bag to avoid damage during shipment. Easy to take off the package and put it back to the place. Wood base is bare and left unpainted. You can fly your imagination and stain it the color you prefer yourself or with students, friends.
- PRIORITY GIFT OPTION FOR MANY APPLICATIONS----It is an amazing and fantastic product at this price. Its elegant gift package makes it spruce up and presentable. It has a wide range of application as, great gift for student's science project, Physical/mechanical learning, teachers Demo props on the class, birthday gift for friends, families, parents, students, etc. Many of our customers come from school, colleague, etc.
Product Dimensions: 8.2 x 5.6 x 4.5 inches
Item Weight: 1.6 pounds
Manufacturer recommended age: 16 years and up
Is Discontinued By Manufacturer: No
Manufacturer: Sunnytech
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Dec 17 – Dec 18
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
I ordered one of these Stirling Engines when they showed up on the Gold Box deal, without knowing much about Stirling engines at all. It's been an enjoyable education. First off, the item arrived promptly and well-packaged, looking exactly as shown in the listing. It came with two of the glass tubes for the heating cylinder, the alcohol burner, two wicks, and an extra set of O-rings for the heating tube seal. It took longer to unwrap the glass tube than it did to attach it to the engine, and the machine was ready for use. I picked up a can of 95% Denatured Alcohol from Home Depot (available in the paint department) and fueled up the burner. My first attempt to run the engine was outside, revealing one potential issue with the design. Any bit of air movement tends to push the flame away from the heating tube, and will inhibit the engine from running properly. When I attempted it again indoors with the cooler and ceiling fans off, the flame stayed on the glass tube and the engine ran flawlessly. I did find that it will pick up a bit more speed if I hold the board down to the table, and not allow it to vibrate. Doing so puts all the engine force into turning the flywheel, and none of the energy is lost shaking the board. If you have problems with air currents when trying to run this engine, you can make a simple wind screen out of heavy aluminum foil. I cut a rectangle of foil slightly longer than twice the length of the heating tube side and wide enough that, when the foil is folder into a 'U' shape, it can go around the alcohol burner and heat tube, extending higher than the tube sits. I bent the two upper corners towards each other and stapled them to form a basic wind screen/chimney, and this keeps the flame concentrated on the heating tube. There's a nice video on Youtube explaining the concept of the Stirling Engine. This model is kind of between the Alpha configuration and the Beta. In the Beta shown in the video, the engine uses a single cylinder with a power piston and the scavenging piston. This model uses two cylinders, with one serving as the power cylinder and the other serving as the scavenging, but the principle remains the same. Considering the original Stirling design is nearly 200 years old now, it's pretty impressive that it's still one of the most efficient engine designs available. If you're looking for a fascinating toy with a certain nostalgic feel, or a terrific prop for a Steampunk display, or just looking for a spark of education, consider picking up a Stirling engine. They're fascinating devices. Youtube video on Stirling engine theory: https://www.youtube.com/watch?v=gQb2sN6UWkA
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Reviewed in the United States on June 21, 2015 by R. Higginson
The media could not be loaded. This is a fantastic desk toy. The parts are, I believe, machined aluminum and it's built well. The only complaint I have with it is that the feet are smooth metal and so when the engine is at full tilt, the thing moves around on my desk and there were was some metal on metal squeaking. So I decided to fix it. To prevent the toy from moving around on my desk, I picked up rubber feet. Not only did it stop the engine from moving but it also stopped metal feet from rattling against my desk. Then to prevent the squeaking, I picked up some white model grease, greased the rods, and the flywheel surface where the linkages connect to the wheel, then promptly wiped up the excess. The engine runs beautifully now. Recommendation to the manufacture: please provide rubber feet and a small thing of grease in the package with instructions where to apply both. For customers: I ran the engine on 70% isopropyl alcohol and then with 99%. Both ran the engine perfectly but the 99% left a ton of soot while the 70% didn't. Your results may vary. Note: The video shown is prior to my fixes and it is also running on 70% isopropyl alcohol.
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Reviewed in the United States on April 10, 2024 by Patrick
I have wanted one of these for a long time. I picked this one because of the price. There were not a lot of reviews, but it was similar to other models with plenty of good reviews, so i took a chance. Mine ran ok with normal 70% isopropyl alcohol. I went to walmart and bought the 91% and it ran a lot better. Then i screwed up, i put a few very small drops of oil on the moving parts. It would no longer run. I took it all apart and removed the oil and now its running like a champ again. I read somewhere to use pencil "lead" which is actually graphite. I imagine any dry lube would work. I have some molybdenum disulfide lube somewhere that I might try. The machining is good quality, the finish is good too. It came with a spare glass tube (looks like the bottom of a heat resistant test tube, like pyrex or kimex) but I cant be sure. It also came with an extra set of o'rings for the tube. About the only thing I didn't like was the base. It is a piece of wood, with a space for the burner and rubber feet on the bottom. No finish and the edges could use some sanding. The engine bolts to it and could be removed easily if you wanted to finish or replace the base. Dont leave the thing sitting there running. It vibrates quite a bit and it will walk right off the counter or table. Thats not a complaint or a comment about quality, just something I noticed. The little generator thing it cool, but unless its running at full speed, you will only see a dim red light. When it gets up to speed, you will see green, blue, and red. You can also remove the belt if you just want to watch it run fast. In all, I have had a lot of fun playing with it and experimenting. Try reversing the position of the cranks with an allen wrench. You can make it run backwards. Also, try icing the cold cylinder. Worth the money for sure. Arrived double boxed from China in perfect condition. I got it about 5 days after I ordered.
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Reviewed in the United States on April 14, 2014 by CDL
An amazing engine. I got this for my engineer daughter and she loves it.
Reviewed in the United States on October 12, 2025 by Kevin Finch
Bought this product as a part of my senior design project to reverse-engineer. The product works well. Takes about 30-45 seconds to heat up before it'll get started. I know it works with methanol, denatured alcohol, and 99% isopropyl alcohol fuels. But isopropyl alcohol leaves so much soot on the bulb it leaves the bulb opaque. Would recommend denatured alcohol as a fuel if possible due to almost non-existent soot and quicker startup to other fuels mentioned. Comes with 3-4 cotton wicks. Easiest to clean bulb when it's still warm. Has a hell of a vibration though that makes it move around the table when running so be cautious unless you plan on gluing it down or something. Good product for the price.
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Reviewed in the United States on December 19, 2023 by Ash