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http://hv4all.com/pulsejet/2011/motor/venturi.JPG http://hv4all.com/pulsejet/2011/motor/venturi%20(1).JPG http://hv4all.com/pulsejet/2011/motor/monterad.JPG http://hv4all.com/pulsejet/2011/motor/monterad%20%281%29.JPG http://hv4all.com/pulsejet/2011/motor/monterad%20%282%29.JPG http://hv4all.com/pu...

Thanks. Mark: The seams will be stagger, in the picture the parts is not welded together, the tailpipe is actually hanging. PyroJoe: Yes, they have the same area within about 5% Open valve grid area is 550.8cm2 and tailpipe area 730cm2, so about 75% Here is this weekends work, more parts for the dif...

Some sheet metal work, starting with 5m2 of 2mm stainless steel. Here is a link to our site. http://svarthaletracing.se/ http://hv4all.com/pulsejet/2011/motor/CIMG8821%20%28Large%29.JPG http://hv4all.com/pulsejet/2011/motor/CIMG8825%20%28Large%29.JPG http://hv4all.com/pulsejet/2011/motor/CIMG8828%20...

Machining the diffusors http://hv4all.com/pulsejet/2011/drawing/diffuser/CIMG8803%20%28Large%29.JPG http://hv4all.com/pulsejet/2011/drawing/diffuser/CIMG8809%20%28Large%29.JPG http://hv4all.com/pulsejet/2011/drawing/diffuser/CIMG8810%20%28Large%29.JPG http://hv4all.com/pulsejet/2011/drawing/diffuser...

Hello again, i am back from the dead. :D I just want to show my progress in this build. The valve grid and first diffusor http://hv4all.com/pulsejet/2011/pj-forum/valvegrid.PNG http://hv4all.com/pulsejet/2011/pj-forum/diffusor.PNG http://hv4all.com/pulsejet/2011/drawing/Ventilblock%20med%20faser.png...

Thanks, i think i will give your version a try. Do you think i could make the tailpipe 1400mm and then make a slightly larger pipe that's slides over it, so i can try different lengths from 1400mm to 1700mm by just sliding the pipe back and forth? Do you know what frequency its going to operate on w...

Sorry i haven't responded before now, did have a lots of work and overtime. This weekend the whole team met and discussed the project and different designs. We made some changes: First we are not going to use the ice yacht, instead we are going to mount the motor in a old stripped down and modified ...

Viv: I did use use a venturi between combustion the chamber and valve grid but didn't get the same heating pattern, but i could be that he just used thicker material for the combustion chamber? . http://hv4all.com/pulsejet/ny/CIMG6817%20%28Large%29.JPG PyroJoe : If i understand correctly, the dimens...

One thing that i am planning to improve on this engine is the fuel system, so today i did some experimenting with home-made fuel nozzles. The nozzles are really simple, the pressurised fuel is pushed through a 0.8mm hole and hits the end of a 2mm pin that then creates a fine mist. (I will try to mak...

Thanks for your reply , Accordingly to WebPilot's calculations with 0.25mm valves i did get 0.455 which is not that fare from 0.431. "The new dfr computation using these revised parameters, is dfr = 76/167 = 0.455 which differs by +5.59% from the requisite value of 0.431. These valves should still l...

Now its time to plan for this winters speed weekend here in sweden. As you may know, last year i did build a kick powered by a 100lbs pulsejet and this year we are planning something bigger. I was think something like a 1/2 scale Argus mounted on the (modified) ice yacht (iceboat) that weldion, Joha...

Hello, i got your message and i will try to answer your questions when i get home to the computer tonight (writing on my mobile phone).

Johansson: thanks, and i really appreciate the hospitality of you and your team. Here is a short You-tube clip of the race, the beginning is from the last run and the rest from the first run. http://www.youtube.com/watch?v=7zgc1yqICII And two photos taken by another visitor: http://iloapp.photo4fun....

Thanks, I will.
But still some work left, finishing the fuelsystem, brakes, paint, and a few other things.
It will be a long might....

Eric: how many percent methanol should i try?

Is that a good or bad "he he he"?