Search found 1553 matches

by metiz
Fri Sep 03, 2021 1:43 pm
Forum: Tools and Construction
Topic: Workshop machinery
Replies: 6
Views: 1028

Re: Workshop machinery

There's visible play, I have pretty much no tools for it and the tool holder is diy. I think there's a crack in the casting at the termination point of the lead screw.
by metiz
Tue Aug 31, 2021 10:52 pm
Forum: Tools and Construction
Topic: Workshop machinery
Replies: 6
Views: 1028

Re: Workshop machinery

Well it does take up a lot of space, so that's good
by metiz
Sun Aug 29, 2021 7:34 pm
Forum: Tools and Construction
Topic: Workshop machinery
Replies: 6
Views: 1028

Re: Workshop machinery

Great finds tufty! I bought a lathe in 2014 for 350 euros and it's a total piece of shit haha
by metiz
Thu May 13, 2021 11:23 am
Forum: Valveless pulsejet forum
Topic: My first pulse jet!!!
Replies: 6
Views: 2435

Re: My first pulse jet!!!

Use 1mm stainless steel for engines that last a good while. You can also still weld 1mm steel pretty well. A slip roll is useful but by no means necessary! You can get really good results with a piece of round and later square pipe clamped in a good vice and a hammer. That's how I built most of my e...
by metiz
Wed Dec 23, 2020 11:26 pm
Forum: Valveless pulsejet forum
Topic: Lockwood Hiller Pulsejet *almost* running
Replies: 4
Views: 3116

Re: Lockwood Hiller Pulsejet *almost* running

Hi Comics, welcome to the forum! Nice build you have there. I don't think the straight pipe will be a problem. Looking at your video, I have one piece of advice, and this is the first time I've said this to anyone on this forum: I think you're using too much gas! Right at the beginning of your video...
by metiz
Tue Dec 15, 2020 10:08 pm
Forum: Valveless pulsejet forum
Topic: Mike's Build Log
Replies: 388
Views: 240463

Re: Mike's Build Log

Mike Everman wrote:
Tue Dec 15, 2020 2:55 pm
I had to quickly figure out the auto start fuel again, since at the shop we got rid of our air compressor and switched to a nitrogen tank for blow off, which doesn’t work so well for starting a pulsejet!
Not with that attitude :P

Good to see you back to fin-nicking with jets again!
by metiz
Mon Dec 14, 2020 9:44 pm
Forum: Gas turbine forum
Topic: ScrapQueen's turbocharger jet
Replies: 10
Views: 5332

Re: ScrapQueen's turbocharger jet

I tried to build one of these things before. I had a hot (non)start and burned up the turbine. The only advice I can give is: don't try starting too long or you risk overheating. Also, as a general rule: bigger turbo chargers are better suited than the little ones. On a side note: welds are really i...
by metiz
Tue Nov 17, 2020 9:18 pm
Forum: Valved pulsejet forum
Topic: Possible to convert valveless to valved?
Replies: 3
Views: 2963

Re: Possible to convert valveless to valved?

Valved and valveless engines have different geometries, so you can't just convert one into the other
by metiz
Mon Nov 09, 2020 12:46 pm
Forum: Valveless pulsejet forum
Topic: Scrap Queen's first foray into valveless pulse jets
Replies: 30
Views: 10587

Re: Scrap Queen's first foray into valveless pulse jets

Good stuff. Try adding some NOx to the fuel mixture for a nice boost. If you want to build an augmenter, check here
by metiz
Fri Nov 06, 2020 7:14 pm
Forum: Valveless pulsejet forum
Topic: Scrap Queen's first foray into valveless pulse jets
Replies: 30
Views: 10587

Re: Scrap Queen's first foray into valveless pulse jets

That's the stuff! Congratulations. Did you feel your bones rattle? :P Looking at your video, I think you can run it a lot harder still.
by metiz
Thu Nov 05, 2020 3:59 pm
Forum: Valveless pulsejet forum
Topic: Scrap Queen's first foray into valveless pulse jets
Replies: 30
Views: 10587

Re: Scrap Queen's first foray into valveless pulse jets

Try freehanding the injector to find the sweet spot. If you still can't get it to start, see if you can borrow a compressor somewhere.
by metiz
Thu Nov 05, 2020 10:54 am
Forum: Valveless pulsejet forum
Topic: Scrap Queen's first foray into valveless pulse jets
Replies: 30
Views: 10587

Re: Scrap Queen's first foray into valveless pulse jets

Sorry...still not running :? You need more gas. Here's a video of an engine built with Pyrojoe's specs from a couple of years back. It's a bit bigger but the same type. I start it using only a Rosscojector. I've uploaded the whole thing, including all the failed attempts. Maybe you can get some poin...
by metiz
Wed Nov 04, 2020 10:35 am
Forum: Valveless pulsejet forum
Topic: Scrap Queen's first foray into valveless pulse jets
Replies: 30
Views: 10587

Re: Scrap Queen's first foray into valveless pulse jets

...you've built 4 engines already without starting even one? Bold move :lol: