MotoMike

Thanks guys.   If you are curious, here is the bridge in it's last seconds...  the guys in the pickup on the new bridge on the right apparently had to do something and  then get out of there.  

Marc, that isn't a bad couple of ideas.  more food for thought.  I have not deadline, so plenty of time to consider. 

M

JABOV

Just a box of vermiculite.  got a big bag that fills a 16 inch tool box.  

and some testing files.  I've heard various opinions on them but the seller took an offer so I gave them a try.  I used them on a few tools and knives that have a stated hardness.  I see that once you get the feel of them they could be quite useful.  

Maybe a kiln wash of Plistix on the forge and the fire side of your doors?  couldn't hurt.

Recently in my town, the long existing bridge across the Mississippi was imploded after construction of it's replacement.  The old Savanna-Sabula bridge has been there since the 30s and was always known to me.  In my life I remember it painted silver, red and most recently blue.   Today following doctors orders for my hip recovery my grandson and I took a walk along the river near the site of the old bridge.  we found the attached piece of steel.  clearly remnant of the implosion.  probably about 20 inches long and every bit of 35 pounds.  some of the red and blue are visible on the piece.  

Am I reaching if I see a garden sculpture in this?   maybe with a blacksmith finish mounted on a stained 8x8 ?   just thinking.  other ideas?   

Mikey  thanks for the detailed explanation.  food for thought.  

Frosty thanks for trying to get through to me.  Hope shopping went ok. 

Jimmies  Good Job.  Your second leaf looks better than my 5th.  

Nice lines.  can always use another parer

Fair enough

We'll have to wait till my next maintenance cycle to see on the smoke from a piece of paper as that space is well packed and rigidized  so I don't think there is a path.   I think you are making assumptions about my assumptions.    I don't think it is all about psi.  for the venture effect to take place, I'd think we need a venture.  the  small distance that the burner sits up in the cavity and the cavity itself, might be such a venturi if a lousy one.   that could possibly explain the intake of smoke from the space between burner and mount. 

Perhaps you or someone else can make a suggestion on an authoritative text on the subject.  

Still this is academic and doesn't address how a larger intake will improve the situation.  

We'll chat later.  

No ideas on how to do it or suggestions.  Just curiosity about it being done, so when I see someone has added something to the s7 plate on an anvil thread, I check it hoping to see it in progress or other recommendations.    Is that ghosting?  if so yes

Frosty

I appreciate you taking the time to try to hammer in understanding.  Not getting it Frosty.  when I built mine I noticed steam or smoke exiting the space between the burner and mixing tube I suspect from moisture or some chemical from materials I used flashing off.  This caused me to pack that space with kaowool and rigidize it.  

I get your analogy Frosty but would submit that it is not the same as the jet sucking in air for a couple reasons, one because it is expanding like crazy at the exit owed to the heat.  additionally, it is located at the output. the flame has no tube in which to create a vacuum to suck in air.  It is the traveling down the tube where the magic happens, no?   if the jet were located at the bottom I don't think it would work as intended.   e    I'll allow it might be so, but still hard to get my head abound.  

Saying it is so, wouldn't packing the space as I did solve the problem if that is where  the extra air  comes from?   And if that is not where it is coming from, how does increasing the bell size correct the issue and in fact not make it worse?

3 hours ago, HojPoj said:

...(or being drawn into the forge through leaks around the burner)….. 

HojPoj  thanks for the quick response.  I find it hard to imagine air being drawn into the space between the mixing tube and the burner mount.  I would think all your drawing would be through the burner as once it ignites there is great expansion inside the forge forcing all gasses out.  ie dragon breath, and If a space exists between the burner and the mount, forcing it out there as well.  If that is true, then how would increasing the burner available air by increasing the intake bell size solve this issue.  I looked at it and thought that what is needed is more gas in the forge atmosphere so that all the oxygen is used up inside the forge creating a reducing atmosphere.  I recognize that I may have it wrong and wait to be educated.  

S7 plate on an anvil a distant memory

there appears to be two videos the first does not play for me.  the second is shot from a high angle and can't really see what is going on in the forge.  as far as how it behaves when you cover the air intake, that is about what I'd expect.  

Mikey, can you expound a bit on the flame causing scaling?  I was operating on the assumption that scaling would be caused by an oxidizing atmosphere and thought also that a bigger inlet bell would increase the oxidizing nature of the atmosphere.  here to learn.  

Welcome Marshall from northern Illinois.

I look forward to your progress.  It seems like a big job.  Is an automotive clutch feasible?

my finish level improves with my experience.  I at this time don't think I can pull off the finished work shown.  a draw knife is in my near future so we'll see.  Incidentally Jennifer, the pickup tongs used your tutorial on splitting stock to make tongs.  

Really Al, it's sculpture

pattern is close to a lot.  Swedish pattern, Hudson Bay pattern, Greenland pattern, Maine pattern to name a few.  the logo doesn't look boy scout to me. 

They look good to me

It looks like it is coming along.  Have you run it long enough for the interior to really heat?  Most I've seen will when up to heat be totally orange yellow.  see how your flame is once up to heat?

Al

My thought is that you are an extraordinary fabricator.  Your form follows function and  the work is top notch.  This design is very pleasing to my eye.  

Mike

Not a coal guy, but it looks pretty good to me.  

Looks very functional.  does the back wall  on the south side?   I wish I could get by in the winter with such a structure.  

She looks like a beauty Steamboat.  Nice square threads on the screw.  Cant see the jaws, but  doesn't look to have been abused or even used much.