Search found 42 matches

by erik
Tue Mar 01, 2011 12:48 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Mon Jan 24, 2011 2:18 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Sun Jan 23, 2011 12:57 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Sun Jan 23, 2011 12:44 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Sun Jan 23, 2011 12:32 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Mon Dec 20, 2010 9:00 pm
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Mon Dec 20, 2010 12:24 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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 ...
by erik
Sun Dec 12, 2010 1:49 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Thu Dec 09, 2010 11:43 pm
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Tue Dec 07, 2010 3:04 am
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Re: Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Mon Dec 06, 2010 12:44 pm
Forum: Valved pulsejet forum
Topic: Planing for next years speed weekend, (1/2 scale Argus)
Replies: 111
Views: 53024

Planing for next years speed weekend, (1/2 scale Argus)

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...
by erik
Mon May 03, 2010 6:23 pm
Forum: Valved pulsejet forum
Topic: Another pulsejet kick from Sweden
Replies: 73
Views: 24584

Re: Another pulsejet kick from Sweden

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). 8)
by erik
Tue Mar 30, 2010 12:04 am
Forum: Valved pulsejet forum
Topic: Another pulsejet kick from Sweden
Replies: 73
Views: 24584

Re: Another pulsejet kick from Sweden

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....
by erik
Wed Mar 24, 2010 9:19 am
Forum: Valved pulsejet forum
Topic: Another pulsejet kick from Sweden
Replies: 73
Views: 24584

Re: Another pulsejet kick from Sweden

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?
by erik
Tue Mar 23, 2010 3:25 pm
Forum: Valved pulsejet forum
Topic: Another pulsejet kick from Sweden
Replies: 73
Views: 24584

Re: Another pulsejet kick from Sweden

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