Building A Hydraulic Loader For A Lawn Tractor

Lawn tractors are a great way to mow a large yard or small paddock. They save you the effort of pushing a mower around and they’re fun to drive, to boot. However, they can be even more fun wi…

3D Printed Axial Compressor Is On A Mission To Inflate Balloons

[Let’s Print] has been fascinated with creating a 3D printed axial compressor that can do meaningful work, and his latest iteration mixes FDM and SLA printed parts to successfully inflate (an…

Unbricking Trains, Uncovering Shady Behavior

The first clue was that a number of locomotives started malfunctioning with exactly 1,000,000 km on the odometer. And when the company with the contract for servicing them couldn’t figure out…

Machining A Reciprocating Solenoid Engine

The reciprocating engine has been all the rage for at least three centuries. The first widely adopted engine of this type was the steam engine with a piston translating linear motion into rotationa…

3D Printed Engine Gets Carburetor

3D printed materials have come a long way in the last decade or so as printers have become more and more mainstream. Printers can use all kinds of different plastics with varying physical character…

Two Pots On Your Moped

The fastest motorcycle in the world is not some elite racer piloted across the salt flats at crazy speeds, instead it’s your first bike. Even if it’s a 50 cc moped, no other motorcycle …

What Makes Wedge Coils Better Than Round For PCB Motors?

PCB motors are useful things. With coils printed right on the board, you don’t need to worry about fussy winding jobs, and it’s possible to make very compact, self contained motors. [at…

Jet Engine Powers Tea Kettle

While there are plenty of places around the world to get a great cup of tea, no one has quite burned it into their culture like those in the United Kingdom. While they don’t have the climate …

A Detonation Engine Prototyped Using Resin Printing

Over the years [Integza] has blown up or melted many types of jet engine, including the humble pulsejet. Earlier improvements revolved around pumping in more fuel, or forced air intakes, but now it…

Transparent Cylinder Shows You What You Otto Know About 4 Cycle Engines

When we think of a typical four stroke internal combustion engine, we think of metal. And for any type of longevity or performance, that’s certainly the right choice. But [Integza] wanted to …

This Jet Engine Will See You Through

Have you ever wished you could peer inside a complex machine while it was still running? We sort of can with simulations and the CAD tools we have today, but it isn’t the same as doing IRL. […

Adding Voluminous Joy To A DIY Turbojet With A DIY Afterburner

You don’t happen to own and operate your own turbojet engine, do you? If you do, have you ever had the urge to “kick the tires and light the fires”? Kicking tires simply requires …

Recycled Speed Boat Beats The Barnacles Out Of Your Average Rebuild

There’s an old saying that says “Anything is possible with enough Time, Money, or Brains. Pick two.” For [Mr HỒ Thánh Chế], the choice was obvious: Time, and Brains. This is evide…

3D Printing A Carburetor Is Easier Than You Probably Think

We’ve all been there. You see a cool gadget on the Internet to 3D print and you can’t wait to fire up the old printer. Then you realize it will take 8 different prints over a span of 60…

Charge Your Apple With Apples

When you think of ethanol, you might think of it as a type of alcohol, not alcohol itself. However, in reality, it is the primary ingredient in adult beverages. Which means humans have gotten quite…

Home Made Stirling Engines From Expedient Materials

Many of us have read about Stirling engines, engines which form mechanical heat pumps and derive motion from the expansion and contraction of a body of air. A very few readers may have built one, b…

A V2 Rocket Inspired Steam Turbine Skateboard Is Just Around The Corner

[Integza] never fails to amuse with his numerous (and sometimes really sketchy) attempts to create usable thrust, by pretty much all means possible and the latest video (embedded below) attempting …

Gravity-Water-Air Powered Engine

Air engines are a common occurrence here on Hackaday. They’re relatively novel and reasonably easy to 3D print without requiring any fluids or supporting machinery. For example, [Tom Stanton]…

DIY Prony Dyno Properly Displays Power Production

When hackers in the US think of a retailer called Harbor Freight, we usually think of cheap tools, workable but terrible DVM’s, zip ties, and tarps. [Jimbo] over at [Robot Cantina] looked at …

Electric Jet Engine Uses 3D Printed Compressor, Skips The Turbine Altogether.

Turbojet engines are an incredible piece of 20th century engineering that except for some edge cases, have mostly been replaced by Turbofans. Still, even the most basic early designs were groundbre…