Dude has a tig, but decided to stick weld the suspension pieces. Oooh kaaay.

My learnen has told me that parts that are going to be stressed will last longer if the heat goes farther out than when kept close to the weld joint. All of Piper Aircraft's welding is oxy-acetylene. 

That is an amazing build. Has to have a very nice shop with all the tools he is using. 
 

TKOPerformance wrote:

HudginJ3 wrote:

My learnen has told me that parts that are going to be stressed will last longer if the heat goes farther out than when kept close to the weld joint. All of Piper Aircraft's welding is oxy-acetylene. 

My father-in-law spoke about this during his time working on special submarine projects for the DOD.  They used to silver braze pipes together, but after several failures as subs started being able to go deeper they switched to welding.  They made an exhaustive study of welding techniques and inspection techniques to ensure there would be no failures.  The pipe welds ended up being oxyacetylene because it achieved the best penetration while still being controllable (some of these pipes were only 1/4" ID, but the method needed to be used on pipes up to several inches ID).  They found TIGs made very pretty welds, but they were often not strong or had inclusions because the weld didn't get hot enough to cook contamination off fully.  Sometimes the old methods are still the best,  If its good enough to weld pipes in subs its good enough.  A failure there could literally result in the loss of a boat with all hands (+/- 130 submariners).
 

I recall that we used to have problems with the sense lines for the EPR (engine pressure ratio) systems on the JT8D-217C engines on our MD-80 aircraft. The lines were all silver soldered together and the constant vibrations would cause the solder joints to fail and we would get some really crazy power indications in the cockpit. I changed a fair number of those over the years.

Last edited by Ron68 (2/14/2022 12:36 AM)

Historically a welder is the machine, and a weldor is the person. However, as people become lazy they've been using the word welder as both the person and the machine.

Bearing Bob wrote:

Historically a welder is the machine, and a weldor is the person. However, as people become lazy they've been using the word welder as both the person and the machine.

Good to know.  You know I'm a stickler for accurate English.  If I hear one more person talk about the posi rear in their Mustang I may just lose it...

Nos681 wrote:

So we should use LSD instead 😜

I'm gonna skip the LSD. Pot is much safer.

 

First time I stopped in Australia (early 90’s), I picked up some magazines.

I chuckled when I figured out what they were talking about…still do.

There are some beautiful Falcons and Holdens there.

GTM is close though.
818 is the mini version.

50vert wrote:

I've never heard the term "plated" in reference to a diff.
Dan, sadly we don't build Falcons or Holdens anymore.   Modern world I guess. No more Aussie innovation. I think the only car Ford America makes nowadays is the Mustang.
 

It might also be a subgenre word.  Do you mess with imports at all?  I first encountered the word in reference to Subaru differentials. 

TKOPerformance wrote:

50vert wrote:

I've never heard the term "plated" in reference to a diff.
Dan, sadly we don't build Falcons or Holdens anymore.   Modern world I guess. No more Aussie innovation. I think the only car Ford America makes nowadays is the Mustang.
 

It might also be a subgenre word.  Do you mess with imports at all?  I first encountered the word in reference to Subaru differentials. 

Untill I got into Mustangs, my experience was with Ozzie stuff and old English cars. helped out my boys with 300 HP Swifts ... that is a perfect example of  torque steer.
 

6sally6 wrote:

Most of y'all know I was a nuclear pipe weldor(er) at the shipyard in Charleston for many years.
I also sailed on subs before that while in the Navy.
"Seen-a-bunch-of-subs-inside-and-out!"
I certainly DON'T know everything about welding and subs butt...... the Thresher sank with all men onboard in .....1968-69 (somewhere about then.)
The main reason they sank and never recovered was because it was before SubSafe requirements were instituted.
One of the main changes in the Sub Safe system was.....NO silver brazed joints were allowed on piping exposed to sea pressure. ALL pipe joints exposed to sea pressure will be welded! (stick or TIG mainly TIG)
At depths in excess of 1000 feet..brazed joints were more likely to fail than TIG welded joints.
Thresher was the last sub the US has lost!
6sally6

Ah, that's why we get along so well.  My father-in-law was on a sub for 6 years in the Navy, then worked at Portsmouth Naval Shipyard before joining the DOD late in his career.  He did mainly electrical, but worked on the reactors too. 

Interesting you mention the Thresher.  I was just reading about it a couple days ago.  It sank in '63 after sailing from Kittery, ME, which is a couple miles from Portsmouth (where she was built), but it had most recently been repaired in Groton, CT.  It does seem the beginning of the chain reaction that caused the loss of the boat was likely a failure of a salt water pipe joint that was brazed instead of welded.  The leak likely shorted an electrical panel that caused a reactor SCRAM, and procedures at the time required too much time for a reactor restart to regain propulsion before the vessel sank to crush depth.  The only other method of surfacing was an emergency blow, but temporary strainers left in the air lines to the ballast tanks likely became clogged with ice and prevented blowing the tanks.  It descended to likely 730 meters before imploding, which was well below crush depth.  The records of this are just now being released.  The loss of the Thresher and the Scorpion were tragic as they occurred during a war where as Tom Clancy said "there are no victories only casualties".