---
product_id: 83079949
title: "Sunnytech Sunnytech Hot Air Stirling Engine Single Flywheel Education Toy Electricity Power Generator M14-03-"
brand: "sunnytech"
price: "R4786"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Sunnytech"
url: https://www.desertcart.co.za/products/83079949-sunnytech-sunnytech-hot-air-stirling-engine-single-flywheel-education-toy
store_origin: ZA
region: South Africa
---

# Alcohol burner heat source Dual-cylinder Stirling engine Durable, ready-to-run build Sunnytech Sunnytech Hot Air Stirling Engine Single Flywheel Education Toy Electricity Power Generator M14-03-

**Brand:** sunnytech
**Price:** R4786
**Availability:** ✅ In Stock

## Summary

> ⚙️ Ignite curiosity with the classic engine that never goes out of style!

## Quick Answers

- **What is this?** Sunnytech Sunnytech Hot Air Stirling Engine Single Flywheel Education Toy Electricity Power Generator M14-03- by sunnytech
- **How much does it cost?** R4786 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/83079949-sunnytech-sunnytech-hot-air-stirling-engine-single-flywheel-education-toy)

## Best For

- sunnytech enthusiasts

## Why This Product

- Trusted sunnytech brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Durable:** Crafted with sturdy materials and a sleek silver finish, it fits perfectly on your desk or display shelf.
- • **Ready Out of the Box:** No assembly required—just fuel the burner and watch physics come alive instantly.
- • **Educational & Nostalgic:** Perfect for curious minds and steampunk enthusiasts craving a hands-on science conversation starter.
- • **Timeless Engineering Marvel:** Experience the nearly 200-year-old Stirling engine design that still impresses with efficiency and elegance.
- • **Clean, Silent Power Generation:** Harness heat from an alcohol burner to smoothly spin the single flywheel without batteries or noise.

## Overview

The Sunnytech Hot Air Stirling Engine is a compact, dual-cylinder educational toy that converts heat from an alcohol burner into mechanical energy via a single flywheel. Made in the USA with durable materials, it requires no batteries or assembly, making it an ideal hands-on tool for learning thermodynamics and mechanical principles. Its silent operation and vintage design also make it a unique decorative piece for professionals and enthusiasts alike.

## Description

Single Flywheel Education Toy which is made of durable material.

Review: 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
Review: Very nicely made. Instructions are not fool proof!

## Features

- Durable construction
- Single Flywheel Education Toy
- Electricity Power Generator

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00DS1NLXQ |
| Assembly Required | No |
| Batteries Included | No |
| Batteries Required | No |
| Best Sellers Rank | #229,517 in Toys & Games ( See Top 100 in Toys & Games ) #5,991 in Science Toys & Kits |
| Colour | silver |
| Country of Origin | USA |
| Customer Reviews | 4.5 4.5 out of 5 stars (385) |
| Date First Available | 24 July 2014 |
| Item Dimensions LxWxH | 20.8 x 14.2 x 11.4 Centimeters |
| Item Weight | 726 g |
| Item part number | M14-03-S |
| Language | English |
| Manufacturer | Sunnytech |
| Material Type(s) | Wood |
| Product Dimensions | 20.83 x 14.22 x 11.43 cm; 725.75 g |
| Remote Control Included? | No |

## Product Details

- **Assembly Required:** No
- **Item Weight:** 726 g
- **Item dimensions L x W x H:** 20.8 x 14.2 x 11.4 Centimeters
- **Theme:** Science
- **UPC:** 609226907478

## Images

![Sunnytech Sunnytech Hot Air Stirling Engine Single Flywheel Education Toy Electricity Power Generator M14-03- - Image 1](https://m.media-amazon.com/images/I/61g4hcBvPNL.jpg)

## Questions & Answers

**Q: Where can I buy a replacement glass tube for a M13-03-S stirling engine?**
A: I could never find parts.
I bought a second one just for the.parts.
Have used the fuel jar and glass tubes from it.

**Q: I just got mine... The glass tube is packed seperately... There are no instructions on how to install it... Can anyone help?**
A: Just carefully push it over the piston.

**Q: Does it come assembled?**
A: Yes, it comes assembled. Alcohol not included

**Q: We broke the glass capsule by dropping it on the floor. How can we order a replacement?**
A: I never could find replacement parts for mine. I ended up getting a second one.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by R***N on 21 June 2015*

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

### ⭐⭐⭐⭐ Review
*by P***Y on 7 May 2023*

Very nicely made. Instructions are not fool proof!

### ⭐⭐⭐⭐⭐ Review
*by P***K on 10 April 2024*

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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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-02-26*