Search found 11 matches

by pulsejetgroup
Sun Apr 15, 2012 12:03 am
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 718005

Re: More free plans: 40 pound Chinese

We don't see how we are gonna get more fuel. There are excess flow valves inside the propane tanks ( propane tanks made in the last 12 years) that if you have a large pressure differential will shut off the flow to next to nothing. The weed burners allow the pressure differential to occur way beyond...
by pulsejetgroup
Sat Apr 14, 2012 2:36 am
Forum: Off topic forum
Topic: M40 Chinese - Valveless Pulse Jet - HELP
Replies: 1
Views: 2831

M40 Chinese - Valveless Pulse Jet - HELP

Hello all,

We have constructed this pulse jet and need some tips and/or suggestions on how we can get this thing running. Please watch this video and let us know what you think.

http://www.youtube.com/watch?v=Kn4Y0A8o00A

Additional videos will be posted to this channel

Thank you!
by pulsejetgroup
Sat Apr 14, 2012 2:16 am
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 718005

Re: More free plans: 40 pound Chinese

Hey Metiz, We attempted a test again today with little luck. We got some burps but no long lived independent pulsing. Here is a link to our best run so far: http://www.youtube.com/watch?v=Kn4Y0A8o00A&feature=plcp&context=C477f314VDvjVQa1PpcFMnHwvGCZ6CrVW6X5MlItz-KdSOS-rUsfs%3D I will be posting addi...
by pulsejetgroup
Thu Apr 12, 2012 3:40 pm
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 718005

Re: More free plans: 40 pound Chinese

We did try sparklers but still no dice. We did have a solenoid valve on the line after the two tanks come together which could limit our flow. We are using Propane, two 20-lb tanks. We will try to get the video to you soon.
by pulsejetgroup
Thu Apr 12, 2012 4:11 am
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 718005

Re: More free plans: 40 pound Chinese

Hello again Metiz, Will get photos to you guys soon. We tested today but ran into some problems. We just couldn't get her to pulse. We got ignition and some flame out but no dice on it actually running on its own. We figure part of our problem is ignition source. We are using an electric fence charg...
by pulsejetgroup
Thu Mar 01, 2012 5:28 pm
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 718005

Re: More free plans: 40 pound Chinese

Hey Metiz, We currently have the 40 pound chinese pulse jet completed. We are just wondering more details about your fuel system. I know what size tanks you are using and that one is for gas and the other for liquid propane (flipped upside down). I know that they are connected in parallel which spli...
by pulsejetgroup
Sun Nov 13, 2011 1:44 am
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 718005

Re: More free plans: 40 pound Chinese

Metiz, did your second engine use 47 mm intakes or 50mm?
by pulsejetgroup
Sat Nov 12, 2011 4:06 am
Forum: Valveless pulsejet forum
Topic: More free plans: 40 pound Chinese
Replies: 182
Views: 718005

Re: More free plans: 40 pound Chinese

Why a shorter combustion chamber and convex cap on the current design? Quite a bit different from the original design on page 1.
by pulsejetgroup
Tue Oct 25, 2011 2:39 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 5134

Re: Engineering Senior Design Project 2011

Good advice on the tubing inconsistencies, we’ll be checking that out for sure. As for the pressure, we’re looking for a transducer that is fast enough to measure the cycle. We’ll be measuring a few areas for pressure. Still deciding where the areas are going to be. The only load cells we have at sc...
by pulsejetgroup
Wed Oct 19, 2011 8:28 pm
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 5134

Re: Engineering Senior Design Project 2011

One of our constraints with this design is that we specified a 25 pound thrust engine or better in our proposal to the school. I should have mentioned that earlier. We're planning on having an engine built by Christmas, and the next semester will consist of running and instrumenting the engine. As f...
by pulsejetgroup
Wed Oct 19, 2011 1:38 am
Forum: Valveless pulsejet forum
Topic: Engineering Senior Design Project 2011
Replies: 14
Views: 5134

Engineering Senior Design Project 2011

We’re working on a mechanical engineering senior design project. Our plan is to build a valveless pulsejet, get it running, instrument and measure it, and then improve it. Been browsing the forum and we’re looking at Lockwoods and the 40lb Chinese engine. Something that’s easy to get going would hel...