www.pulse-jets.com

It's been a long time--school ended up being more of a resource hog than I had hoped, but now that I've got more time on my hands I'm trying to finish this project up. I'm about to head home for the day so I'm just posting pictures of my progress to date. Just finished designing the front cowl! fron...

Maybe you're too far along with the project, but why not just bend the intake away from the operator?

I had a hunch when I first saw this but it wasn't until today that I finally asked my Dynamics professor to confirm it--by mounting the pulse-jet like this on the wheel, the bike will accelerate no more than 1/2 as fast as the same motor mounted conventionally (on the frame pointing back). *edit* I'...

The turbine wheel isn't completely finished, but it's time to move on to the diffuser system which I've got modeled. Milling the wheel took forever, I had to do two because on the first one the cutters were punching through the blades of the turbine wheel--sorry but it just takes too much time for m...

Last weekend I did the first test of a ram-rocket that I built, but unfortunately a bulkhead blew at about ten feet causing the rocket to smash into the ground. After this experience I've decided that building an airframe for an experimental motor is an inefficient way to go about the process becaus...

editor@aardvark.co.nz Please include the word "aardvark" in the subject line of any non-reply emails so that my spam filters don't eat your message. There are also some forms on his website that supposedly send messages that he'll read. Bruce Simpson is notoriously difficult to get a hold of. If you...

Yup, that's the one. At that price I don't think anybody's going to be getting it though, it was a lucky find at my library.

Unfortunately I can't find an ISBN for the book, I'm even having trouble finding mention of it online. It's called "The Papers of Robert H. Goddard" and is a three volume set--really an interesting read, Goddard's research was very broad.

In addition, if this type of motor were used for a plane, we could be talking about a pretty considerable change in the center of gravity over the course of the flight. I haven't done any rc flying, so whether this would be an issue or not will hopefully be answered by somebody with first-hand exper...

Actually in the book there is a good deal of information about the development of the "multiple-charge rocket". In fact, this might sound familiar to you Viv: "It impressed me that the simplest plan would be to use a long tube from which the cartridges were shot into the combustion chamber by small ...

I just began reading the first volume of the collected works of Robert Goddard, and lo and behold, in his first rocket patent he describes a device that mechanically chambers a fresh fuel grain. Here's a link to the patent online:

http://www.invention-protection.com/pdf ... 103503.pdf

"In addition to the use of chemical additives to increase the burning rate, certain physical means have been effective, such as placing of wires or other shapes of good metal heat conductors in the propellant grain. Another method uses slits or slots in the grain to promote erosive burning in the sl...

"High pressure fuel will be injected into the engine, creating a vacuum and causing air to be sucked in the air intake" I have a hard time believing that you can start this rotor spinning from a dead stop--as far as you guys know has one of these ever been built? (I don't mean a tipjet helicopter, I...

http://www.rimworld.com/pgh/drake/index.html This is similar--essentially they built a large "magazine" style system. Heada-As far as I understand it the Krushnik effect does not apply until the exhaust gasses are expanding to atmospheric--as in exiting the nozzle. In this "MetalStorm" type motor it...

In a well designed system there shouldn't be a chance of the metal rods coming loose--at least not a big enough chance to completely demerit the idea yet. I found the reference too, it's in rocket propulsion elements. If there's any interest I'll post the text.