PulseJetEngines.com Pulse Jet Plans, Pulsejet Blueprints, Video Tutorials, RC Jet Projects
About Pulse Jet Engines .com :
We’re a group of like minded hobby geeks & and back yard scientists who decided to acquire the B -T domain and media, and return the site to a hobby resource site. While we don’t produce pulse jets for sale, we play around with them, and other sci-gadgets like lasers, neodymium magnets, model rockets, and we feel there is a great deal this site can offer to hobbyists around the world. We’ve transferred the site to a new domain with a new more search friendly name.
We plan on releasing much of the information we acquired, which was previously unreleased due to fear of potentially valuable trade secrets being given away or stolen. We don’t have any kind of stake in any industry and feel that this knowledge should be available to advance the art and science of pulse jets and put them to use in many technologies. The volume and details of the numerous advances and experiments will be sure to turn the hobby pulse jet community upside down!
We’re also going to offer kits and parts like spark plugs, and other raw materials to help fund the site and some of the projects we want to do, documented step by step from start to finish.
What are Pulse Jet Engines?
Pulse jet engines, or Pulsejets are a very simple family of internal combustion engine that have few or no moving parts. They were invented in the early 1900′s, and were cutting edge science until after WWII. Pulsejets got abandoned, many feel long before they even reached their prime. They went from being the main source of power for tens of thousands of cruise missiles, to something that a skilled hobbyist could build in their garage and used to power planes in Jet Speed contests.
There are two basic types of pulse jet engines, valved engines, and valveless engines. Both types operate on the same principles, and can run on a wide range of fuels, can be scaled to very small or very large sizes, and are surprisingly powerful for their simplicity.
Valved Pulse Jet Engines:
A valved pulsejet engine like its name implies, has a mechanical valve inside it with which to control the flow of air in and out of the engine. This means that it does have a moving part that can wear out, and also more mechanical complexity, but it also has a few benefits.
Valved engines are much like a two stroke engine carburetor system, and an exhaust pipe, but no piston! Air flows in through the intake, lowering the pressure inside the carburetor section, drawing in fuel without need of a fuel pump. The fuel vaporizes and passes through the valve system, into the tail pipe, where it burns, causing a pressure rise and slamming the valve system shut.
Exhaust blasts out of the back of the engine at great speed, so fast that it causes a vacuum to form inside the tail pipe. More fuel and air gets drawn in through the intake system, into the tail pipe, where it builds up until it is again ignited by remaining burning gas.
This all occurs faster than you can blink, as high as several hundred times a second for small engines, and as low as 40 or so times a second for very large engines.
Valved Pulse Jet Benefits:
- High power to weight ratio
- Lower complexity for integrating into RC vehicles (no fuel pump system needed)
Valved Pulse Jet Drawbacks:
- temperamental to start
- valves wear out, sometimes in seconds
- more difficult to build
Valveless Pulse Jet Engines:
Valveless pulse jet engines operate on the same principles as a valved engine, except with no valve, and no moving parts! The shape of the engine entirely controls the flow of air in and out, this usually means that the intake of the engine also faces backwards. When the engine fires, exhaust shoots out both the intake and the exhaust pipe.
Valveless pulse jet engines are basically a specially shaped hollow tube! There are large number of designs, and an experienced pulsejet builder can design and build pulsejets in almost any shape and size and get them to run. However, because they will run under such a wide range of conditions no matter how badly out of whack, this has given valveless engines a reputation as poor performers.
There are many out there that claim that all valveless engines have low thrust output, high fuel consumption, and overall poor performance. There are a number of valveless designs though that are much better in most areas than valved engines, or even small turbojet engines. There are a very few engine designs that approach the efficiency of even turbofan engines.
Valveless Pulse Jet Benefits:
- Easy to start
- No moving parts, virtually no maintenance an unlimited run time
- Can run on almost anything that burns including waste material
- Extremely large throttle range
- Easy to design one that runs period
Valveless Pulse Jet Drawbacks:
- Difficult to design one with really good performance
- Harder to integrate into RC vehicles
Overall pulse jet engines have a wide range of applications from RC hobby, to alternative energy, industrial processes, and many other fields. It simply takes someone who is courageous enough to break away from tradition and to pioneer something old, with a new twist!
For more information go to our How Pulse Jet Engines Work page, for lot more information on not only how they work, but how to build your own.
Featured Pulse Jet Projects & Tutorials:
We have a ton of video footage to sort through, a 2 TB drive full of it to be precise, as well as many pictures, plans, technical documents, tutorials and much more. We’re in the process of sorting through all this and bringing it to light. Some of the projects and pages we will be putting up soon are:
Multi Part series from designing, picking out tools and materials, constructing your engine, and starting it up for the first time!
Advanced Pulse Jet Design Creator:
we’re using the source code for the advanced design tools developed at Beck Tech to put together our own extensive design program so you can quickly design and build your own engines.
Work shop tutorials & tips:
We feel that the process and techniques on how to build something should be just as well described and detailed as the blueprints to build the actual project itself. We will be uploading a number of projects, starting off with very simple projects with basic tools, progressing to more advanced things, like advanced welding projects that people can progress to over time.
Latest News Posts & Updates:
Here are some of our latest blog & news posts from various categories. You can also visit our main blog page and view older topics and projects.