Search found 591 matches
- Thu Oct 11, 2007 3:22 am
- Forum: Valved pulsejet forum
- Topic: Valved Reynst
- Replies: 65
- Views: 59209
What i was doing tho, was slapping my hand onto the hole while it was running strong. The vacuume in the chamber sucks your skin in with enough strength to lift the jar back up with your hand. Afterwards your left with a good red convex lump to show for it on your palm. This was with a large pot, an...
- Wed Oct 10, 2007 1:02 pm
- Forum: Valved pulsejet forum
- Topic: Valved Reynst
- Replies: 65
- Views: 59209
Very interesting guys! (nice citation Pyro, i would not have initialy agreed... but youve brought in the big guns) Just a note from my observations here. I would have expected more than a 4psi difference for the peak low pressure swing.... ill think on this, although something isnt adding up for me....
- Tue Oct 09, 2007 9:32 am
- Forum: Valved pulsejet forum
- Topic: New project underway - ALUMINUM
- Replies: 13
- Views: 11555
i just had a look through your other posts... Did you get your original engine running? Hope you have learnt a lot since then. You are going to need some SUPER cooling on this thing! (much more than you can afford to fly with) Maybe try starting it for the first time somehow fully submerged in water...
- Tue Oct 09, 2007 9:13 am
- Forum: Valved pulsejet forum
- Topic: New project underway - ALUMINUM
- Replies: 13
- Views: 11555
what can i say....... nothing much without mentioning the M word. um... have you built a PJ before? I used a heavy, and i mean 3 or 4mm heavy, tail extention on an engine once... and it m'ed! Ive done water cooled coulings on steel engines and the outside got red! Take video on the first run! cause ...
- Fri Oct 05, 2007 9:36 am
- Forum: Valveless pulsejet forum
- Topic: Straight pipe with nothing inside it.
- Replies: 24
- Views: 20160
Just snip it clean with pincing cutters, then open the resulting sharp edge up to the smallest of slits with the same pincers across the points of the edje. Smaller slit on 90 deg., easier starting, leaner burn and for small enines. Larger slit, and cut on increasing angles, richer, harder to start ...
- Sun Sep 23, 2007 1:39 am
- Forum: Valveless pulsejet forum
- Topic: liquid fueling without fuel pump?
- Replies: 8
- Views: 8427
- Fri Sep 07, 2007 4:05 pm
- Forum: Valved pulsejet forum
- Topic: Valved Reynst
- Replies: 65
- Views: 59209
- Fri Sep 07, 2007 12:35 pm
- Forum: Valved pulsejet forum
- Topic: Valved Reynst
- Replies: 65
- Views: 59209
Just a little observation here. The parabolic curved horn, or just megaphone shape, resonate in their inteded use best from the small end out to the bell. Obvious. BUT in terms of a pulse jet, it seems to resonate better ass about! Intake at the capped off large end. Now, this could be a good thing ...
- Mon Sep 03, 2007 12:18 am
- Forum: Valveless pulsejet forum
- Topic: Third pulse jet is ugly but it works...
- Replies: 3
- Views: 5266
- Sun Sep 02, 2007 11:18 pm
- Forum: Valveless pulsejet forum
- Topic: Erics siamese motor
- Replies: 20
- Views: 17754
Bruno... yes, its gotten itself back at BC... As usual, its generating a closed loop that throws itself out very quickly. HOOOONNKKK, silence. All the tail pipe crazyness is in an attempt to control the peak. Thats about all i will say about it for now. Its really not my toy, im just sitting back la...
- Sat Sep 01, 2007 12:12 am
- Forum: Tools and Construction
- Topic: Need discs
- Replies: 7
- Views: 9158
- Thu Aug 30, 2007 10:07 pm
- Forum: Tools and Construction
- Topic: Need discs
- Replies: 7
- Views: 9158
Need discs
Anyone here know where i can get made/cut about 30 SS 1mm discs on the cheap? OR, even better, any company or individual willing to get onboard with some sponsership and be involved in PJ history??? I need some discs! Big things are happening here, although the budget is a bit tight on this project....
- Wed Aug 29, 2007 9:58 pm
- Forum: Jet Vehicles, All Types
- Topic: Proposed: Pet Porpoise for Lady Anne
- Replies: 8
- Views: 9803
OOOOh, NICE! Wig, here we come! I shall think on the details somewhat before running my fingers off this time. Give it a while to swim a good few laps around in my head. Im wondering why you want to place so much load on your central rear edge? You have a theory here your not willing to let go... le...
- Tue Aug 28, 2007 10:41 pm
- Forum: Jet Vehicles, All Types
- Topic: Proposed: Pet Porpoise for Lady Anne
- Replies: 8
- Views: 9803
ah.... i see, no sponsons. You need sponsons. I dont know how your flat bottomed font end would go... but i wouldnt say well. You need as little wetted surface as possible. Water is very sticky stuff, especialy in this size craft. Even with sponsons, my boats need "air traps" off the end, to extend ...
- Tue Aug 28, 2007 10:31 pm
- Forum: Jet Vehicles, All Types
- Topic: Proposed: Pet Porpoise for Lady Anne
- Replies: 8
- Views: 9803
Found a pic. This is a shot of the rough cutout of the mould for the model, sitting on the full size hull framework. And, the other suggestions that have come to mind after looking again at your drawing. The "cutwateter" NO! This is not a yaught! Get rid of it, you will crash before you know what ha...