Search found 4941 matches
- Mon Feb 08, 2021 2:45 pm
- Forum: Off topic forum
- Topic: hey hey happy new year
- Replies: 2
- Views: 547
Re: hey hey happy new year
Hi Simon! I still burn some fuel and make some noise, mostly when I want to fire up a young engineer-to-be. You building anything fun?
- Mon Feb 08, 2021 2:43 pm
- Forum: Gas turbine forum
- Topic: ScrapQueen's turbocharger jet
- Replies: 7
- Views: 866
Re: ScrapQueen's turbocharger jet
Yeah, you've been amazingly prolific! And successful! Great job.
- Sun Dec 20, 2020 3:50 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1776
- Views: 463170
Re: Odds and ends
I had no idea there were arc lighters! Ding, The More You Know
- Sun Dec 20, 2020 3:41 pm
- Forum: Valveless pulsejet forum
- Topic: Mike's Build Log
- Replies: 384
- Views: 184844
Re: Mike's Build Log
Cool, I will try all of that! Happy Holidays!
- Tue Dec 15, 2020 2:55 pm
- Forum: Valveless pulsejet forum
- Topic: Mike's Build Log
- Replies: 384
- Views: 184844
Re: Mike's Build Log
Gawd, I have to make time for more fun! Happy Holidays, those still watching his thread. I ran my 5 pounder on Saturday. 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 ...
- Fri Dec 11, 2020 2:33 pm
- Forum: Valveless pulsejet forum
- Topic: Scrap Queen's first foray into valveless pulse jets
- Replies: 30
- Views: 3415
Re: Scrap Queen's first foray into valveless pulse jets
That color and sound is addicting isn’t it? I’m all prepped to run one this Saturday.
Scaling from 50,000 feet: a good little motor will scale up, but scaling down is really finicky. That expansive tail makes it more so. If you start with a straight tail, this scale down will probably work.
Scaling from 50,000 feet: a good little motor will scale up, but scaling down is really finicky. That expansive tail makes it more so. If you start with a straight tail, this scale down will probably work.
- Fri Dec 11, 2020 2:20 pm
- Forum: Valved pulsejet forum
- Topic: Possible to convert valveless to valved?
- Replies: 3
- Views: 1240
Re: Possible to convert valveless to valved?
That said, both have similar acoustic geometries. I remember plotting out the acoustic length correction for the bell mouth of a valver, and it yielded the length you’d expect for a valveless intake tube. It would be a very interesting project, proving they are actually much more similar than one mi...
- Sun May 31, 2020 1:07 pm
- Forum: Pressure jet forum
- Topic: Axial (inline Gluey pressure jet engine)
- Replies: 3
- Views: 1200
Re: Axial (inline Gluey pressure jet engine)
Very nice, Kevin! No hearing protection required?
Some time at home helped the project, I’m thinking.
Some time at home helped the project, I’m thinking.
- Tue Jan 14, 2020 8:43 pm
- Forum: Off topic forum
- Topic: My First How to? video, Homemade rotating marble stirling engine
- Replies: 2
- Views: 1811
- Wed Dec 04, 2019 1:35 pm
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1776
- Views: 463170
Re: Odds and ends
Following with interest, Mark!
- Mon Nov 18, 2019 1:10 am
- Forum: Tools and Construction
- Topic: Odds and ends
- Replies: 1776
- Views: 463170
Re: Odds and ends
OK I’ll make one! Where did you get the silicone bands?
- Thu May 09, 2019 1:29 pm
- Forum: Gas turbine forum
- Topic: Exhaust and Afterburner
- Replies: 1
- Views: 4124
Re: Exhaust and Afterburner
Hi Luc, I hope all is well!
I am a member of the GTBA forum, which would be a much better place to find answers about turbojets. http://gtba.co.uk
You should join up.
I am a member of the GTBA forum, which would be a much better place to find answers about turbojets. http://gtba.co.uk
You should join up.
- Thu Jan 17, 2019 2:40 pm
- Forum: Valveless pulsejet forum
- Topic: Valveless pulsejet-computational fluid dynamics
- Replies: 39
- Views: 22783
Re: Valveless pulsejet-computational fluid dynamics
Hi Ganesh, There are 6 holes of .035" diameter at the transition between intake and CC, pointing at 45 degrees from the centerline, toward a point on the centerline a bit into the CC. pocket jet injector holes.PNG I do not have a solid fuel massflow number from test, but at one time predicted it at ...
- Mon Dec 10, 2018 1:28 pm
- Forum: Valveless pulsejet forum
- Topic: Plumbing Pulse jet stalling
- Replies: 2
- Views: 3003
Re: Plumbing Pulse jet stalling
The intake looks too short, and needs to be rounded inside as much as the wall thickness will allow.
- Tue Dec 04, 2018 4:54 pm
- Forum: Valveless pulsejet forum
- Topic: Lockwood Hiller pulse jet rules of thumb?
- Replies: 12
- Views: 5061
Re: Lockwood Hiller pulse jet rules of thumb?
Holy Canoli. 26" tailpipe exit? Might I suggest you start with a smaller, known to run motor to get yer feet wet? There's a lot to it before jumping into something so dangerous.
Scaling is definitely screwy up in this range.
Scaling is definitely screwy up in this range.