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by Eric
Mon Oct 12, 2009 11:13 pm
Forum: Valveless pulsejet forum
Topic: New way of building a valveless pulse-jet: integrated intake
Replies: 22
Views: 5528

Re: New way of building a valveless pulse-jet: integrated intake

Ah well I wouldnt expect any big changes until the mid tube length is increased. As for the cows being scared, well if they stop making milk he can always sell them for hamburger. Milk production varies quite a bit, theres no way he could prove that your engine scared them into making less milk, rat...
by Eric
Mon Oct 12, 2009 6:43 pm
Forum: Buy and Sell
Topic: Beck Technologies: 10lb Thermo Valveless $300 USD
Replies: 2
Views: 4012

Re: Beck Technologies: 10lb Thermo Valveless $300 USD

Sorry but we reserve the right to refuse to sell our products to anyone for any reason.
by Eric
Sat Oct 10, 2009 1:08 am
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 3968

Re: "U" shaped valveless pulse-jet

First I'd suggest reading everything you can find, especially here on the forum, old WW2 technical reports etc. Secondly I'd build a simple engine like the FWE as it is a minimal amount of work. You might think that forming and welding 15 tubes and cones so that they are all matching lengths and per...
by Eric
Fri Oct 09, 2009 5:22 am
Forum: Valveless pulsejet forum
Topic: New way of building a valveless pulse-jet: integrated intake
Replies: 22
Views: 5528

Re: New way of building a valveless pulse-jet: integrated intake

Well from your drawing, the space around the intake and behind the intake will still want to behave as a combustion chamber volume, filling with fuel air mixture ( if the chamber is shorter) otherwise it could potentially just be a big 'dead air' space that has hot non combusting gases that sap the ...
by Eric
Fri Oct 09, 2009 4:57 am
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 3968

Re: "U" shaped valveless pulse-jet

One note: This is obviously intended to be a "Blast Compression" type pulse-jet (Deflagration to Detonation Transition). There are numerous other names to describe the combustion of this type engine, just compare the definitions. In theory, the expanding combustion gases of one side compresses the ...
by Eric
Thu Oct 08, 2009 2:53 pm
Forum: Valveless pulsejet forum
Topic: New way of building a valveless pulse-jet: integrated intake
Replies: 22
Views: 5528

Re: New way of building a valveless pulse-jet: integrated intake

I would shorten the combustion chamber, and use a domed cap with the center pushed into a spike shape, and lengthen the center tube.

I still think that if you get it running at its full potential, its going to melt unless you use a fuel like methanol.

Will be interesting to see how it turns out.
by Eric
Thu Oct 08, 2009 2:46 pm
Forum: Valveless pulsejet forum
Topic: "U" shaped valveless pulse-jet
Replies: 15
Views: 3968

Re: "U" shaped valveless pulse-jet

I dont have any plans to make plans available, and if you build it just as an outer shell with no knowledge of the internals, it will not run.
by Eric
Mon Oct 05, 2009 4:44 am
Forum: Pressure jet forum
Topic: Where Can I Get Pressure Jet Plans
Replies: 5
Views: 3225

Re: Where Can I Get Pressure Jet Plans

If you are dead set on a pressure jet, there are plans here on the forum / plans section, and elsewhere. We dont really do a whole lot with classical pressure jets because they are essentially heaters. They are a neat project, but overly complicated, difficult to properly tune, picky with fuels and ...
by Eric
Tue Sep 22, 2009 2:33 am
Forum: Valved pulsejet forum
Topic: How to Design Build and Test Pulse Jet Engine.
Replies: 15
Views: 13046

Re: How to Design Build and Test Pulse Jet Engine.

They definitely can run at lower pressure like webpilot said. In fact just tonight at the shop I sneezed so hard that one of the 70 lbers 15 feet away started to resonate, was quite amusing that my sneeze matched its resonant frequency.
by Eric
Sat Sep 19, 2009 10:35 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 80818

Re: Calculating top speed on ice...

Actually, making the cones takes longer with the slip roll if it even works properly, only thing they are good for in my opinion is rolling straight sections, with making cones there is too much adjustment and screwing around to get things to work properly, and then every time you have to tighten it...
by Eric
Thu Sep 17, 2009 5:08 pm
Forum: Buy and Sell
Topic: Beck Technologies: Spark Ignition Systems
Replies: 0
Views: 2548

Beck Technologies: Spark Ignition Systems

http://www.beck-technologies.com/sitebuilder/images/ignitionbox1-561x418.jpg We can custom make model T based ignition systems to order, the model T buzz coil is a simple, rugged, self contained system designed to survive constant use in harsh weather and bumpy road conditions. It produces many spa...
by Eric
Thu Sep 17, 2009 3:03 pm
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 80818

Re: Calculating top speed on ice...

Yea its always a good Idea to purchase individual pieces of equipment rather than the 3 in 1 combos. .5 mil will crush itself flat in those large diameters. .75 mil would be about the minimum I'd recommend. Slip rolls are useful for straight sections, and very gradual cones (if the sliproll works pr...
by Eric
Thu Sep 17, 2009 1:25 am
Forum: Valveless pulsejet forum
Topic: Calculating top speed on ice...
Replies: 575
Views: 80818

Re: Calculating top speed on ice...

I hope you just plan on using it for the slip roll and limited brake work, after 3 attempts of cutting thin stainless the cutting part is dead. Keep the geared side tight so you dont get any tooth slipping, and whatever you do, dont oil the rollers :P For rolling stainless, you dont want to follow t...
by Eric
Mon Sep 07, 2009 11:43 pm
Forum: Valveless pulsejet forum
Topic: Running Pulsejets - Setting up and running pulsejets SAFELY
Replies: 3
Views: 7862

Re: Running Pulsejets - Setting up and running pulsejets SAFELY

Finally managed to convert one of my valveless animations into a flash animation, gives a good view of the basic internal workings of a pulsejet.

http://www.beck-technologies.com/info.html