Search found 86 matches

by James D
Mon Jun 20, 2005 7:48 pm
Forum: Valveless pulsejet forum
Topic: Another (easy starting) FWE
Replies: 13
Views: 5991

re: Another (easy starting) FWE

To answer Marten other question
I built the jet from .7mm thick stainless steel sheet, It weighs around 500 grams including spark plug.
by James D
Mon Jun 20, 2005 7:41 pm
Forum: Valveless pulsejet forum
Topic: Another (easy starting) FWE
Replies: 13
Views: 5991

re: Another (easy starting) FWE

The position of the stinger doesn't seem critical, It can be moved around anywhere from one to three inchs from the intake opening, The pitch of the jet does change but it keeps running. I tried lighting the rosscojector before putting it in the intake but it just blows itself out, The fuel pressure...
by James D
Mon Jun 20, 2005 7:20 pm
Forum: Valveless pulsejet forum
Topic: Another (easy starting) FWE
Replies: 13
Views: 5991

re: Another (easy starting) FWE

Thanks for the replies,

The FWE is built to the dimensions given by Larry in his jetzilla article, 1.25" tailpipe and 26" total length etc.

The "Rosscojector" is made from 5/16" copper brake pipe, cut through with pliers as per photo
by James D
Sun Jun 19, 2005 9:26 pm
Forum: Valveless pulsejet forum
Topic: Another (easy starting) FWE
Replies: 13
Views: 5991

Another (easy starting) FWE

Hi folks,
Here's a short video of my FWE starting, without forced air, using a rossco stinger & propane gas.
by James D
Mon Mar 28, 2005 10:49 pm
Forum: Tools and Construction
Topic: Slip Rolls
Replies: 8
Views: 4432

re: Slip Rolls

Ideally you want two rolls to turn, Its hard for them to grip on stainless steel. Check this Ebay item. http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1&item=4539259920&category=35625&sspagename=WD2V This design would work better because the metal is gripped firmly between the two verti...
by James D
Sat Feb 05, 2005 8:12 pm
Forum: Tools and Construction
Topic: Today's tidbits
Replies: 619
Views: 176128

Re: Today's tidbits

I wonder what that spark ignitor on the dyna jet ebay lot that mark posted is off? http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=1200&item=5954724905&rd=1&ssPageName=WDVW#ebayphotohosting It looks very similar to this one. http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=5536807660&ssPa...
by James D
Sat Feb 05, 2005 7:54 pm
Forum: Tools and Construction
Topic: Today's tidbits
Replies: 619
Views: 176128

Re: Today's tidbits

You'd make a fortune, Just get the right colour and a good sales pitch
;>)
by James D
Sat Feb 05, 2005 3:32 pm
Forum: Tools and Construction
Topic: Today's tidbits
Replies: 619
Views: 176128

Re: Today's tidbits

The bailey sold for £205 ($385), seems like quite alot.

How long do the petals last in those things?
by James D
Fri Feb 04, 2005 5:31 pm
Forum: Tools and Construction
Topic: Today's tidbits
Replies: 619
Views: 176128

Re: Today's tidbits

Another pulse jet (Dynajet?) on ebay UK, looks mint.

http://cgi.ebay.co.uk/ws/eBayISAPI.dll? ... eName=WDVW
by James D
Tue Feb 01, 2005 9:26 pm
Forum: Valveless pulsejet forum
Topic: Anyone for a big valveless?
Replies: 41
Views: 16559

Re: Anyone for a big valveless?

I made a basic trolley with nylon casters and used a set of spring scales, to measure mine. Tied the scales between the trolley and a skip, and stood well back. It jumped about a bit, but you could get a reading. Not very scientific, I admit it. You can get big fishing scales from Ebay, 100lb+ there...
by James D
Tue Feb 01, 2005 8:34 pm
Forum: Valveless pulsejet forum
Topic: Anyone for a big valveless?
Replies: 41
Views: 16559

Re: Anyone for a big valveless?

That things wicked!
It looks like a quality build.
How can you resist running it now youve built it?!

Tell us more, whats the spiral on the exhuast, Is it a coiled pipe preheater for liguid fuel?