Search found 283 matches

by Jonny69
Fri Jun 09, 2006 3:29 pm
Forum: Valveless pulsejet forum
Topic: Revisiting Kentfield engines
Replies: 106
Views: 73139

re: Revisiting Kentfield engines

Thanks for posting that M, interesting findings. Bill Hinote kindly sent me the paper by email but it's nice to have it here too. I haven't had a chance to read through it yet but it's on my priority list.
by Jonny69
Fri Jun 09, 2006 12:53 pm
Forum: Valveless pulsejet forum
Topic: Small gas bottle pressure-maintaining concept
Replies: 0
Views: 1769

Small gas bottle pressure-maintaining concept

I've noticed a number of us are using small gas bottles like Mapp gas canisters and the smaller 4Kg propane bottles. Powering a decent sized jet usually means you have to use a big bottle or the pressure drops off very quickly even though there is still enough fuel in the bottle to drive the jet for...
by Jonny69
Sun Jun 04, 2006 9:12 pm
Forum: Valveless pulsejet forum
Topic: Liquid fueling without injection
Replies: 4
Views: 3133

re: Liquid fueling without injection

Is there any reason why no-one has stuck a small side-draught carburettor like an SU or a Weber DCOE on the front of a pulsejet? I was going to for my degree project engine but got caught up in all the excitement of injecting propane. I know it probably wouldn't work for a valveless but it would mak...
by Jonny69
Sun Jun 04, 2006 9:04 pm
Forum: Valveless pulsejet forum
Topic: got it running on the first day
Replies: 6
Views: 4075

re: got it running on the first day

I like the cut of your jib Steve! What did you use for the 180 degree bend and what size is it?
by Jonny69
Fri Jun 02, 2006 1:12 pm
Forum: Valved pulsejet forum
Topic: Another material for reeds ?
Replies: 9
Views: 6589

re: Another material for reeds ?

Titanium oxidises and goes brittle at high temperature so it's not as much use as you would expect. There may be some alloys of it that perform better. The stuff to use is Iconel which is a high-nickel alloy of steel. It looks much like stainless steel and is as springy but doesn't suffer from oxyge...
by Jonny69
Thu Jun 01, 2006 9:43 pm
Forum: Valveless pulsejet forum
Topic: Revisiting Kentfield engines
Replies: 106
Views: 73139

Revisiting Kentfield engines

Hi guys, I've been trawling through a lot of the older work on here and something I can't seem to find much on is the "Kentfield" engines some of you were working on. Were they mainly on the older forum or something? So basically what I can glean is there is a Kentfield paper, but I don't know exact...
by Jonny69
Thu Jun 01, 2006 9:34 pm
Forum: Valveless pulsejet forum
Topic: High-performance pulsejets for all, for free (as in beer)
Replies: 52
Views: 32881

re: High-performance pulsejets for all, for free (as in beer

Hi milisavljevic, welcome back. You're a bit before my time on this forum but I've stumbled across your previous posts. One question though: how come all your old posts say "DELETED"? Is this the mysterious backdoor edits you talk about? Looking forward to this info though. Come one, I hate suspense...
by Jonny69
Wed May 31, 2006 2:28 pm
Forum: Valveless pulsejet forum
Topic: Following on from 'Pulsejet Cooking'
Replies: 14
Views: 8358

re: Following on from 'Pulsejet Cooking'

I just noticed where you are testing your jet Enzo, BRIGHTON BEACH!!!

Did no-one complain?
by Jonny69
Mon May 29, 2006 4:56 pm
Forum: Off topic forum
Topic: Problems getting to this site
Replies: 34
Views: 24115

re: Problems getting to this site

Thanks for the tip Leo. Just tried that proxy but it doesn't make much difference, I think it just makes a lot of hops before it gets there.
by Jonny69
Sun May 28, 2006 2:18 am
Forum: Off topic forum
Topic: Problems getting to this site
Replies: 34
Views: 24115

re: Problems getting to this site

Hi Leo, sorry to hear you're having problems. Mine has been consistently ok for some time now. I've been connected with this router ever since though, so maybe that makes a difference. There is one hell of a delay before I get to the site but to be honest if I can get here at all it's good enough fo...
by Jonny69
Sun May 28, 2006 2:12 am
Forum: Valveless pulsejet forum
Topic: Christmas in May, for APC/the Big 1.0!!
Replies: 18
Views: 8926

re: Christmas in May, for APC/the Big 1.0!!

Wow it would be great to meet you guys if you're meeting up here in England next week. Shame I'm going to be tied up, I might have been pestering you for an invite.
by Jonny69
Mon May 22, 2006 10:24 pm
Forum: Valveless pulsejet forum
Topic: 30mm Anti-Aircraft Shell Casings And My New School Project..
Replies: 6
Views: 4477

re: 30mm Anti-Aircraft Shell Casings And My New School Proje

Hmm, it's a long shot but if you wet the bottom and stand it on the stainless steel sink in the kitchen it should leave a rusty mark on the sink. You won't be popular with mum though!

Sure it's not tin? Can you ask your teacher?
by Jonny69
Mon May 22, 2006 10:19 pm
Forum: Valveless pulsejet forum
Topic: for use in providing a hovercraft with lift?
Replies: 24
Views: 12382

re: for use in providing a hovercraft with lift?

Ah that's a shame, I made one with 2 leaf blowers and that held up 8 people on a flat surface. Shame the CO2 rocket couldn't make it move along with that many people on it though :D

I got that on telly 8)
by Jonny69
Wed May 17, 2006 5:06 pm
Forum: Valveless pulsejet forum
Topic: heat resistant mortar
Replies: 20
Views: 15951

re: heat resistant mortar

Metiz, what is that product called? Hopefully we have something similar here in England.

I am currently scheming and hatching...
by Jonny69
Wed May 17, 2006 1:29 pm
Forum: Valveless pulsejet forum
Topic: heat resistant mortar
Replies: 20
Views: 15951

re: heat resistant mortar

^^^Wehey! Now we're talking, 2800F!!! I'm sure they must be available, the ceramics that are used on the skin of the space shuttles bust be pretty exotic but I reckon they are available at a price. It would only be a matter of getting in touch with a company that deals with exotic materials and how ...