More free plans: 40 pound Chinese

Moderator: Mike Everman

BenJet
Posts: 33
Joined: Wed Feb 10, 2010 4:59 pm
Antipspambot question: 125
Location: Spain

Re: More free plans: 40 pound Thermojet

Post by BenJet » Thu Feb 11, 2010 11:33 pm

Nice, I'm following this thread and looking forward you finish this thing successfully. :)
Everman, give us forum avatars!

Kool
Posts: 115
Joined: Wed Oct 01, 2008 7:39 pm
Antipspambot question: 125
Location: The Netherlands

Re: More free plans: 40 pound Thermojet

Post by Kool » Fri Feb 12, 2010 9:21 am

metiz wrote:
poech prut wrote:
Are you planning to put an augmentor on it?
no
ok
...It's better to generate heat efficiently, than recover it efficiently...

ace_fedde
Posts: 421
Joined: Mon Feb 16, 2009 9:26 pm
Antipspambot question: 0
Location: The Netherlands

Re: More free plans: 40 pound Thermojet

Post by ace_fedde » Fri Feb 12, 2010 7:05 pm

poech prut wrote:
metiz wrote: no
ok
huh?
Your scepticism is fuel for my brain.

BenJet
Posts: 33
Joined: Wed Feb 10, 2010 4:59 pm
Antipspambot question: 125
Location: Spain

Re: More free plans: 40 pound Thermojet

Post by BenJet » Fri Feb 12, 2010 7:13 pm

ace_fedde wrote:
poech prut wrote:
metiz wrote: no
ok
huh?
yikes
Everman, give us forum avatars!

metiz
Posts: 1575
Joined: Fri Apr 21, 2006 6:34 pm
Antipspambot question: 125
Location: Netherlands

Re: More free plans: 40 pound Thermojet

Post by metiz » Fri Feb 12, 2010 8:21 pm

ok that'll do with the useless posts
Quantify the world.

metiz
Posts: 1575
Joined: Fri Apr 21, 2006 6:34 pm
Antipspambot question: 125
Location: Netherlands

Re: More free plans: 40 pound Thermojet

Post by metiz » Sat Feb 13, 2010 12:29 pm

Finished.

Hopefully I can test this today...
Attachments
100_1374.jpg
100_1373.jpg
Quantify the world.

Johansson
Posts: 1161
Joined: Sun Nov 21, 2004 9:42 pm
Antipspambot question: 0
Location: Northern Sweden

Re: More free plans: 40 pound Thermojet

Post by Johansson » Sat Feb 13, 2010 3:13 pm

Good luck!

metiz
Posts: 1575
Joined: Fri Apr 21, 2006 6:34 pm
Antipspambot question: 125
Location: Netherlands

Re: More free plans: 40 pound Thermojet

Post by metiz » Sat Feb 13, 2010 3:43 pm

Today's a bust. maybe tomorrow
Quantify the world.

Viv
Posts: 2158
Joined: Sat Oct 04, 2003 2:35 pm
Antipspambot question: 125
Location: Normandy, France, Wales, Europe
Contact:

Re: More free plans: 40 pound Thermojet

Post by Viv » Sat Feb 13, 2010 4:23 pm

metiz wrote:Today's a bust. maybe tomorrow
Hi Metiz

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

Viv
"Sometimes the lies you tell are less frightening than the loneliness you might feel if you stopped telling them" Brock Clarke

Viv's blog

Monsieur le commentaire

metiz
Posts: 1575
Joined: Fri Apr 21, 2006 6:34 pm
Antipspambot question: 125
Location: Netherlands

Re: More free plans: 40 pound Thermojet

Post by metiz » Sat Feb 13, 2010 5:08 pm

Haha thanks
Quantify the world.

Johansson
Posts: 1161
Joined: Sun Nov 21, 2004 9:42 pm
Antipspambot question: 0
Location: Northern Sweden

Re: More free plans: 40 pound Thermojet

Post by Johansson » Sat Feb 13, 2010 6:44 pm

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?

hinote
Posts: 1241
Joined: Sat Oct 04, 2003 1:54 am
Antipspambot question: 0
Location: Central California

Re: More free plans: 40 pound Thermojet

Post by hinote » Sat Feb 13, 2010 7:24 pm

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

Viv
Posts: 2158
Joined: Sat Oct 04, 2003 2:35 pm
Antipspambot question: 125
Location: Normandy, France, Wales, Europe
Contact:

Re: More free plans: 40 pound Thermojet

Post by Viv » Sat Feb 13, 2010 7:42 pm

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
"Sometimes the lies you tell are less frightening than the loneliness you might feel if you stopped telling them" Brock Clarke

Viv's blog

Monsieur le commentaire

metiz
Posts: 1575
Joined: Fri Apr 21, 2006 6:34 pm
Antipspambot question: 125
Location: Netherlands

Re: More free plans: 40 pound Thermojet

Post by metiz » Sat Feb 13, 2010 7:51 pm

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.
Quantify the world.

Johansson
Posts: 1161
Joined: Sun Nov 21, 2004 9:42 pm
Antipspambot question: 0
Location: Northern Sweden

Re: More free plans: 40 pound Thermojet

Post by Johansson » Sat Feb 13, 2010 8:47 pm

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:

Post Reply