Search found 83 matches

by Stuart
Fri Dec 09, 2005 2:40 am
Forum: Valved pulsejet forum
Topic: Turboprop PJ experiment update
Replies: 119
Views: 56567

Re: re: Turboprop PJ experiment update

Hi Stuart Yep, lotsa energy made available by efficiently slowing those exhaust gases . Cheers John The engine I've designed (maybe patentable) is a continuous flow pressure jet (sorta). It now runs (anemically), but it runs! (eureka moment here) and there is plenty of room for tweaking, so hope sp...
by Stuart
Thu Dec 08, 2005 6:23 am
Forum: Valved pulsejet forum
Topic: Turboprop PJ experiment update
Replies: 119
Views: 56567

Re: re: Turboprop PJ experiment update

Hi Fredrik The PJ's coming along nicely , just finished putting some paint on the heat shielding , just a matter of screwing the panels on and she'll be ready for a testrun with the "new" plastic reeds . Its a bit of a bummer having to develop the basic PJ rather than just making a standard design ...
by Stuart
Wed Dec 07, 2005 9:16 pm
Forum: Valveless pulsejet forum
Topic: Article - Good Enough for Wikipedia?
Replies: 32
Views: 10459

Re: re: Article - Good Enough for Wikipedia?

All right - egged on by some of my friends here, I have become too impatient for Bruno and have posted it, with a few minor changes for the sake of clarity. L Cottrill Thanks for the work Larry, now it is posted, we can edit online. I've made some fairly critical additions and edits to the wikipedi...
by Stuart
Wed Dec 07, 2005 7:12 am
Forum: Valveless pulsejet forum
Topic: Article - Good Enough for Wikipedia?
Replies: 32
Views: 10459

re: Article - Good Enough for Wikipedia?

I'm just starting to get into Wikipedia. The ramjet section leaves a lot to be desired and darn if that doesn't look like a pic of Maggie Mugs as the example. They botched the explanation that a subsonic diffuser and exhaust nozzle are the opposite of the supersonic design. They also left out the fl...
by Stuart
Fri Dec 02, 2005 7:11 pm
Forum: Tools and Construction
Topic: A "How to Bend Tubing and Pipe by Hand" web site
Replies: 27
Views: 14359

Re: re: A "How to Bend Tubing and Pipe by Hand" we

If anybody (USA) wants some references for sources of good product, let me know. Bill H. Acoustic Propulsion Concepts ".......some day soon we'll be flying airplanes powered by pulsejets." I think I've found some sources for up to 4.5 " mandrel bent pipe, but I would have a cow if someone could fin...
by Stuart
Thu Dec 01, 2005 5:19 pm
Forum: Pressure jet forum
Topic: Gluhareff's hand?
Replies: 10
Views: 10547

Re: re: Gluhareff's hand?

they also squished the intake tubes as well so they aren't circular. Or is that an optical illusion? Stu, that was standard on this type of engine. Irina is still marketing the oval intake model through 'her' website. I saw that after I looked at all the pictures. The only reason to do that is to m...
by Stuart
Thu Dec 01, 2005 5:11 am
Forum: Valveless pulsejet forum
Topic: Pressure Vs Pulse Jets
Replies: 15
Views: 7293

Re: re: Pressure Vs Pulse Jets

Stuart, wow. Start a new thread and tell us about it! Well, it is definitely a different design and it definitely runs, but it runs like crap so far. Part of the problem was my non-welded prototypes were leaking like sieves, so I've fixed that (some jackass stole my welder). Another problem is find...
by Stuart
Thu Dec 01, 2005 4:19 am
Forum: Pressure jet forum
Topic: Gluhareff's hand?
Replies: 10
Views: 10547

Re: re: Gluhareff's hand?

Mike Everman wrote:Nice specimens. The photos were good enough for me!
It looks like they were mounted as the leading edge of a rotor, but they also squished the intake tubes as well so they aren't circular. Or is that an optical illusion?
by Stuart
Tue Nov 29, 2005 4:24 pm
Forum: Tools and Construction
Topic: Bill's Tip o' the Day
Replies: 32
Views: 14722

Re: re: Bill's Tip o' the Day

The intake runs cool enough to justify the continued use of mild-steel exhaust tubing. Here's a shot of M8E, after its first 7 hot-runs. You'll notice the intake still has its shine--as though it's still an unused part (red arrow). The hot (stainless) portions have a beautiful patina--it's a sort o...
by Stuart
Tue Nov 29, 2005 4:12 pm
Forum: Pulse detonation engine forum
Topic: Old stuff I had laying around
Replies: 1
Views: 4462

re: Old stuff I had laying around

I sure do remember that stuff, it was inspirational, though it apparently didn't work very well. Now that we have hindsight, it is essentially a Logan without the tail. So, they are trying to do all their resonance in the combustion chamber rather the tailpipe. There must have been something to it, ...
by Stuart
Fri Nov 25, 2005 3:06 pm
Forum: Ramjet forum
Topic: fuel delivery:: Pressure::Suction::Pump::Machanical Pressure
Replies: 1
Views: 2288

re: fuel delivery:: Pressure::Suction::Pump::Machanical Pres

Forget glowplugs, tried that just smoked (need pressure).
Propane or LP are the best fuels for beginners, the liquids are dangerous as hell in comparison. Try the gaseous stuff first, singe your eyebrows a few times in training and learn some respect before you engulf yourself in a liquid fire.
by Stuart
Thu Nov 24, 2005 5:47 am
Forum: Valveless pulsejet forum
Topic: Pressure Vs Pulse Jets
Replies: 15
Views: 7293

Re: re: Pressure Vs Pulse Jets

Hi Hagent, Would you say that the pressure jet is the best design around? Most effiecent VS thrust? A day will is soon to come, when most of you will have the oportunity to participate and get involved in the further developpement of the thermo-acoustic jet engine ... And gain from it. Beleive me, ...
by Stuart
Thu Nov 24, 2005 5:35 am
Forum: Valveless pulsejet forum
Topic: Recommeded method of fueling FWE with propane
Replies: 5
Views: 2070

Re: re: Recommeded method of fueling FWE with propane

Thank you Steve. It appears to be just beyond where the flare ends. Is that just a wide open line? I.E nothing on the end, no pinch ? Looks like 4-5 mm in diameter. Correct? The memebers on this forum are some of the most helpful people I've ever dealt with. You all deserve a pat on the back. I wil...
by Stuart
Thu Nov 24, 2005 4:27 am
Forum: Ramjet forum
Topic: Ramjets and Turbojet combustors
Replies: 7
Views: 5658

Re: Ramjets and Turbojet combustors

There are similarities between ramjet combustion chambers and those of turbojets. However, modern turbojet combustion chambers tend toward the complex with swirl vanes, high pressure spray nozzles, surface cooling boundary layers, and etc. Production ramjets are more akin to afterburners with simpl...
by Stuart
Thu Nov 24, 2005 3:55 am
Forum: Ramjet forum
Topic: Designing for a particular speed
Replies: 11
Views: 9534

re: Designing for a particular speed

Glenn used to have a website where he had a nifty graft that showed the ramjet efficiency peaking at about mach 2.4