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Re: More UA 328 images
From: Anthony Bauco (tbaucogmail.com)
Date: Tue, 23 Feb 2021 06:30:40 -0800 (PST)
Every plane is different and every engine is different.  And things evolve and change over time.  Both GE and Pratt have made good engines and bad engines.  I worked on a project at GE that was created specifically in response to the Sioux City, IA crash.  The CF6 had issues.  Lots of issues.  The J58, F117 and F119 engines from Pratt did a great job in some of our most advanced planes of their time.  Pratt has a history of pushing the envelope with technological advancements.  But, again, a lot of that was in the past and the past is not always a great indicator of the future.

On Tue, Feb 23, 2021, 8:38 AM Clarence Romero Jr. <clyderomerof4 [at] gmail.com> wrote:
I flew GE engines in the military J-79 
None better 
In fact when the Israeli Air Force buys jets they specifically ask for GE engines 
They could take a beating 
The Airbus family which I am intimately familiar with uses GE engines CFM-56
Never had an issues with them 
PW is resting on their laurels 
The use to make great engines 
Not anymore




     RF4-4EVR

Scars are Tattoos with better stories !

If you have no enemies, you have no character !

Clyde Romero    


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On Feb 23, 2021, at 8:29 AM, Anthony Bauco <tbauco [at] gmail.com> wrote:


I don't know about the exact process other than the bonding is done by plastic deformation followed by high temp and high pressure diffusion bonding using an intermediate material to enhance the bonding.  

I can tell you that I felt better flying in planes with Pratt engines versus GE engines back in the 80s and early 90s.  Even when I was at GE in the late 90s, I still didn't trust them and I was working in the group that was responsible for improving material testing.  But things evolve.  Both companies are not what they used to be.  Pratt may have fallen more.  A lot of us at GE in the late 90s were originally from UT research and we did make a lot of progress at GE.  Titanium raw stock inspection improved as did crack detection.  And we made a lot of progress in laser shot peening to improve material strength.  I was only there briefly due to the caustic environment but I got two patents from that work.  And an improvement to the laser shot peening laser was held back as a trade secret.

I loved working at UTRC when I did my two internships there.  It was great.  Prior to the 1992 recession, GE's research center was good too.  Caustic, but good.  Now it is just caustic.  That recession ruined a lot of corporate research centers.  Hopefully the merger with Raytheon helps the former UT divisions.  Not sure what the impact has been on Sikorski now that they are part of Lockheed but I assumed it would be positive.  Interesting side note, my father knew Igor Sikorski.  While at UT, I worked on a Blackhawk project to detect transmission failure early and enable the pilot to land before it failed.  I solved a major issue they were struggling with.  My supervisor wrote a recommendation letter that got me into MIT for grad school.  Poor guy was stuck at UTRC because his wife was a tenured professor at a local college.  Great guy though, as opposed to my project lead at GE.  He was insane.  A macho hockey player from Canada who was such a stress case that he went temporarily blind in one eye from the stress.  He eventually got demoted and divorced.  Horrible excuse for a human being.  But, for a time, he thrived at GE.  Dude would have made a great study case on the subject of ego and peaking too early in life.

On Mon, Feb 22, 2021, 11:46 PM Rick Moseley <ramosel [at] pacbell.net> wrote:
I mentioned these things on another group this afternoon...
Agreed, not looking good for P&W.
Having flown the TF-30, I was never a fan... other than the J58
I'd still like to know how RR was able to "inflate" titanium.  I knew one of their engineers but that was always a taboo subject.
Thanks for filling in some of the details on the series numbers.

On Monday, February 22, 2021, 6:14:29 PM PST, Anthony Bauco <tbauco [at] gmail.com> wrote:


That 747 uses the PW4056-94 engine which, I believe does not use diffusion bonded hollow blades.  The UAL 777 uses the PW4077-112 which does use diffusion bonded hollow blades.  It is the same engine that failed in 2018 in another UAL 777.  There was also a failure on a JAL 777 in December which used the PW4084-112.  That engine also uses diffusion bonded blades.

Not looking good for Pratt.  

As for carbon fiber, I think it is only GE that uses it.  But RR may be making them by now too.  I was at GE R&D in 2000 when that was brand new.  Scared the crap out of me.  I was in the nondestructive testing department and I know how hard it is to test carbon fiber.  One of my first patents was on this topic.  We were working closely with Lockheed on testing F-35 parts, unrelated to the engines.  We also used our system to test some F1 parts for Ferrari.  I believe GE aircraft engines was using standard ultrasound for the CF fan blades.  To be honest, I don't love the idea of fusion bonded blades either.  Not sure which I distrust more but time will tell.

I also did two internships at United Technologies Research Center working on nondestructive testing.  At that point I would have said they were well ahead of GE on testing.  Both companies ruined their R&D centers so neither is what it used to be.  But maybe UT (now Raytheon) is now worse.  I do completely different work now so I don't follow NDE/NDT closely anymore.  Haven't for 20 years.  


On Mon, Feb 22, 2021, 2:28 PM Erik Nielsen <judge4re [at] gmail.com> wrote:
Same song, second verse. 


On Feb 22, 2021, at 12:22 PM, Clarence Romero Jr. <clyderomerof4 [at] gmail.com> wrote:

Yes it did 


Clyde Romero

If you have no enemies
You have no character ! 

Scars are tattoos with better stories!
When you're out of F-4's you're out of fighters!







On Feb 22, 2021, at 1:15 PM, Rick Moseley <ramosel [at] pacbell.net> wrote:


Still, I think the kevlar blanket around the primary fan did a amazing job!!

On Monday, February 22, 2021, 8:50:42 AM PST, Clarence Romero Jr. <clyderomerof4 [at] gmail.com> wrote:


Oh no
It was uncontained definitely 



     RF4-4EVR

Scars are Tattoos with better stories !

If you have no enemies, you have no character !

Clyde Romero    


Confidentiality Notice:  This e-mail ( including attachments ) is covered by the Electronic Communications Privacy Act, 18 U. S. C., Sections 2510-2521, and is intended only for the persons or entity to which it is addressed, and may contain confidential or privileged material.  Any unauthorized review, use, disclosure, dissemination, copying, forwarding or distribution is prohibited.
This email transmission, and any documents, files or previous email messages attached to it, may contain confidential information that is priviledged.  If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of the information containes in or attached to this message is STRICTLY PROHIBITED.  If you have received this transmission in error, please immediately notify us by reply e-mail at Clyderomerof4 [at] gmail.com or  by telephone at (678 6419932)and destroy the original transmission and its attachments without reading them or saving them to disk.

On Feb 22, 2021, at 11:49 AM, Rick Moseley <ramosel [at] pacbell.net> wrote:


I know RR also uses the hollow or inflated titanium primary fan blades.  Is it only GE that uses carbon fiber?

While there have been some arguments about whether this was contained or uncontained, I think these pics seem to show a nice hole near the turbine are and the fuselage damage is a smoking gun for something coming out radially... 

On Monday, February 22, 2021, 6:25:34 AM PST, Clarence Romero Jr. <clyderomerof4 [at] gmail.com> wrote:


Looks like blade failure 
They PW use hollow blades 



     RF4-4EVR

Scars are Tattoos with better stories !

If you have no enemies, you have no character !

Clyde Romero    


Confidentiality Notice:  This e-mail ( including attachments ) is covered by the Electronic Communications Privacy Act, 18 U. S. C., Sections 2510-2521, and is intended only for the persons or entity to which it is addressed, and may contain confidential or privileged material.  Any unauthorized review, use, disclosure, dissemination, copying, forwarding or distribution is prohibited.
This email transmission, and any documents, files or previous email messages attached to it, may contain confidential information that is priviledged.  If you are not the intended recipient, or a person responsible for delivering it to the intended recipient, you are hereby notified that any disclosure, copying, distribution or use of the information containes in or attached to this message is STRICTLY PROHIBITED.  If you have received this transmission in error, please immediately notify us by reply e-mail at Clyderomerof4 [at] gmail.com or  by telephone at (678 6419932)and destroy the original transmission and its attachments without reading them or saving them to disk.

On Feb 22, 2021, at 9:18 AM, Hunter Schultz <hunter.schultz [at] gmail.com> wrote:


Fan blade failure? From a bird strike? 

On Mon, Feb 22, 2021 at 9:08 AM Clarence Romero Jr. <clyderomerof4 [at] gmail.com> wrote:

> 
> Perhaps you’ve seen these.
>
>
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