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Re: More free plans: 40 pound Thermojet

Posted: Thu Feb 11, 2010 11:33 pm
by BenJet
Nice, I'm following this thread and looking forward you finish this thing successfully. :)

Re: More free plans: 40 pound Thermojet

Posted: Fri Feb 12, 2010 9:21 am
by Kool
metiz wrote:
poech prut wrote:
Are you planning to put an augmentor on it?
no
ok

Re: More free plans: 40 pound Thermojet

Posted: Fri Feb 12, 2010 7:05 pm
by ace_fedde
poech prut wrote:
metiz wrote: no
ok
huh?

Re: More free plans: 40 pound Thermojet

Posted: Fri Feb 12, 2010 7:13 pm
by BenJet
ace_fedde wrote:
poech prut wrote:
metiz wrote: no
ok
huh?
yikes

Re: More free plans: 40 pound Thermojet

Posted: Fri Feb 12, 2010 8:21 pm
by metiz
ok that'll do with the useless posts

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 12:29 pm
by metiz
Finished.

Hopefully I can test this today...

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 3:13 pm
by Johansson
Good luck!

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 3:43 pm
by metiz
Today's a bust. maybe tomorrow

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 4:23 pm
by Viv
metiz wrote:Today's a bust. maybe tomorrow
Hi Metiz

On another topic your weld beads look much improved ;-) good work

Viv

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 5:08 pm
by metiz
Haha thanks

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 6:44 pm
by Johansson
Just curious, what kind of welder do you use? From the pics it doesen´t look like a mag-weld or a tig-weld, perhaps stick welding?

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 7:24 pm
by hinote
Viv wrote:
Hi Metiz

On another topic your weld beads look much improved ;-) good work

Viv
Not totally sure I agree here. I'm not trying to stir up trouble--but it looks as though your welds are not penetrating the base metal by very much. For max strength they SHOULD.

Have you tried making a weld sample and then cutting through it to try and judge the extent of the weld penetration? This is the only realistic way to determine your results.

OTOH the consistent bead quality indicates your increasing skill and experience. Keep it up!!

Bill

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 7:42 pm
by Viv
hinote wrote:
Viv wrote:
Hi Metiz

On another topic your weld beads look much improved ;-) good work

Viv
Not totally sure I agree here. I'm not trying to stir up trouble--but it looks as though your welds are not penetrating the base metal by very much. For max strength they SHOULD.

Have you tried making a weld sample and then cutting through it to try and judge the extent of the weld penetration? This is the only realistic way to determine your results.

OTOH the consistent bead quality indicates your increasing skill and experience. Keep it up!!

Bill
Hi Bill

I should say in his defense that he was having terrible trouble with a gas regulator and some other problems with his MIG, that said he is a long way from were he was only a few weeks ago ;-)

Viv

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 7:51 pm
by metiz
Hey Hinote,

The penetration that I get with my mig weld is good enough. this is the lowest setting. any higher and I would blast through the steel or leave weld beads on the inside - not good. If I look on the inside of the weld seem, I can just about see tiny lumps forming here and there so if the steel is 1mm thick then my penetration is about .8/ .9mm wich is more then good enough. It's not like there are massive pressures to be contained in a pulse-jet.

Re: More free plans: 40 pound Thermojet

Posted: Sat Feb 13, 2010 8:47 pm
by Johansson
Try using a higher amp setting/low thread feed and weld the seams in small sections, I made the experimental insertion pipe for my T2 from 1mm sheet and welded it with a 160A ESAB mag-welder that way without problems.

If you weld for one second, rest for two and then weld one again (and so on...) the metal won´t heat up enough to melt and you will get a nice seam without the look of bird spillings to it. :wink: