Test Equipment Anonymous (TEA) group therapy thread

[mansaxel]

Uggghhh... yeah. "Salaried position" is the new age way to rape employees.   

mnem
and they usually make you give up the benefits package for that "promotion"...

I reluctantly took that in exchange for another vacation week in negotiating my current position. Then, I've got a nominal 39.5 hour work week and no overtime beyond time for time compensation, 6 weeks paid vacation, on top of the normal mostly free (a visit to the GP costs ~40USD, fixed fee) medical care there's "just hand in your receipts" for that last 40 bucks.  It works well for me, despite the overtime absence. Mostly because employer actively insists that we take time off when we've had long days.

My last position before that was public employer, so roughly as above (but overtime and less basic pay) and 7 weeks vacation. Because I'm 40+ years old.

The fascists in the "Sweden Democrats" are like the idiots in AfD or the Farage crowd, they say that this country is a war zone.

[beanflying]

That is exactly the one I was thinking of only BETTER, cuz I have like oodles of Intel CPU coolerz lying around. 

mnem
*toddles off to abuse myself on AliEx*

Ordered - because it was discounted 

Same.


I hate you guys.....

Hate/Love same same in TEA    If it helps I have started sketching up on paper an idea for a custom enclosure. Laser cut I think - see you NEED one of those too 

[cyclin_al]

[...]
The flames are bad enough but what is more alarming is the severe vibration.

If I was looking out the window at that engine I would be thinking that it's going to fall off at any moment.

The vibrations are likely why everything fell apart in the first place.  Wonder if there is an "engine vibration monitor" in the cockpit?

Normally yes on larger aircraft. I don't knw for sure on the PW4000 777 though.  They are intended to detect low level vibrations as an early warning. Not needed in this case as vibration and damage was obvious.
The early 737 vibration indicators were unreliable and when a BA crew on a later 737 had an engine issue their perception of this caused them not to use them in determining which engine was faulty. This contributed to a chain of events that resulted in the working engine being shut down and the aircraft crashing at Kegworth.

Most modern PW engines have telemetry.  I would assume that the pilots would have a suite of parameters available.  I also assume that the airline maintenance office and P&W would have near live telemetry to provide guidance to the pilot on what action to take to protect the engine before failure.  Any uncontained fault is going to get hard questions to the designer, manufacturer and maintainer.  As far as I am aware, something like a blade failure is required to be contained according to the regulations.

Essentially all turbine aircraft in Part 121 service (commercial air carrier) will monitor key engine parameters (e.g., fuel flow, RPM, temps, vibe, EPR) and send this info to the airline over the ACARS data link at scheduled intervals and when a key value has exceeded preset limits.  But I can guarantee you that company dispatch is not going to call the flight crew to ask how they can help with their imminent engine failure.  Besides, in this case it probably happened with no warning so no one could have seen it coming.  Compressor blades are binary...they're either attached to the hub and doing their thing or they've left the engine.

Welcome to TEA.
The new big jets mostly work as you describe but a lot depends on who owns the engines. Recording or transmitting engine parameters is not mandatory (except for accident data recording). Some systems record the data and transfer it by short range data link at the gate. Simplist system is a "quick access recorder (QAR) that records to  memory card or similar Smaller. aircraft and airlines may not even have QAR.
You are correct hat it will not hav given any warning in this event. NTSB have confirmed a loss of fan blade. Looking very similr to UA1175 incident a couple of years ago. That one had indications of a crack in the blade but they thought it was a paint defect!
 

Tnx for the welcome.  I've been lurking for quite a while and I'm proud to admit to being totally addicted to classic TE.  I got excited about this particular thread because I was on the ACARS development team at Arinc in the early years of the service in the 80s.  Coupla more data points...  Yes, a lot of engines are "rented".  The downlink engine data goes to airline ops and the mfr.  But that also applies to owned engines.  Also, it would be a very rare major airline (if any) who wouldn't have ACARS these days.  It's just too important for operating efficiencies.  Yes, many aircraft have a QAR but it's mainly used for the a/c data that can wait until a convenient time to gather it from the recorder.  But ACARS is used for a boatload of purposes in addition to engine data downlink.

Welcome to our crazy little family here.  I too was a lurker for a while, but have been active here almost a year now.  My collection of TE has grown very slowly, but my shopping list of TE has expanded greatly.

My observation is that these engines are kept close to home, so to speak.  It appears the airlines are often locked into using the manufacturers maintenance and overhaul network and any repairs or changes go back to the designers.  So we are speculating on how much data is collected and how quickly the data gets retrieved and analyzed, but we are certain that there is data.  It will be interesting to see what comes out of it, and whether any improvements will be made.

[capt bullshot]

For you guys who ordered that "A Torch" electronic load:

https://www.eevblog.com/forum/testgear/cheezeball-dc-load-dl24p-pump-or-dump/new/

https://www.sevarg.net/2018/06/24/the-atorch-purple-fan-mosfet-destroyer/

[cyclin_al]

I hope they actually do make it worth the misery. You'll be the one-in-a-million.

Spider man crunch ? Is that the equivalent to a spider shrivelling up when treating it with the acetylene torch ?

It's evil. You get down on all fours, on toe and fingertips, like Spider-Man walking up a wall. Then you bring your knee up to the back of you your elbow without falling over, alternating legs. Then you do another set left knee to right elbow, and alternate.

It's also literally one of the best exercises you can do for a thick gut and/or to tighten up stomach muscles to reinforce a injured back. As many as you can bear to do.

mnem
you are the burn...

Ah, similar to doing the plank with the mountain climbing option.  Definitely a good workout.  Do your best to keep balance by exercising the opposing muscles as well.  Crunches (hate 'em), push-ups and chin-ups are all good for you.

Don't go 100% the first time either.  Leave a bit of room to build up to more.  I think it is very important to make building up into a habit... 

[Saskia]

@mnem ugly typo. It's 5 figures (bloody thick fingers) which is still excellent over here.
@tautech
@Brumby I suffered major spine injury when a VW Tuareg driver decided to rear end me. He said that he was not to blame, as I did not get out of his way  fast enough.
Yeah, right.
So this got me a very severe whiplash thingie that led to neurological damage to my left arm and my neck, left my legs paralyzed for a week, my arm paralyzed for a couple of years, and since this happened on the way from work, the state accident insurance kicked in and is currently paying me some disability pension.

However this incident left my neck extremely susceptible for any kind of blerk. So when I have the flu or some similar nasty bug that decided to give me sore muscles, my neck stiffens up in a way that makes any slight movement a 10 out of 10.

It's gotten better now, I can move my head again (which I could not on Friday)
So no need to shoot me yet.

[beanflying]

For you guys who ordered that "A Torch" electronic load:

https://www.eevblog.com/forum/testgear/cheezeball-dc-load-dl24p-pump-or-dump/new/

https://www.sevarg.net/2018/06/24/the-atorch-purple-fan-mosfet-destroyer/

The MOSFET destroyer is the same design as my current one apart from the downdraft fan to my inline one.

I set my lab supply to 40V/5A

Push it beyond 'Chinese' power spec for a start and it blew up the FET Even the specs for the current one at 200V and 20A maximum just because that is the peak specs of the FET which is clearly  Characterizing the device with increasing loads and how it behaves toward the stated 150W would be much more appropriate than just chucking a 40V input at it.

Some of the high frequency hash shown is maybe from his nameless power supply or poor scope technique. 

But he reached HIS conclusion based what he wanted to find was the fault not looking elsewhere to what may have contributed. There is nothing written on what in his opinion is at fault with the design just that it must be 'because reasons'.

EDIT - Power Supply in question - wonder where the spikes came from 

[tautech]

@mnem ugly typo. It's 5 figures (bloody thick fingers) which is still excellent over here.
@tautech
@Brumby I suffered major spine injury when a VW Tuareg driver decided to rear end me. He said that he was not to blame, as I did not get out of his way  fast enough.
Yeah, right.
So this got me a very severe whiplash thingie that led to neurological damage to my left arm and my neck, left my legs paralyzed for a week, my arm paralyzed for a couple of years, and since this happened on the way from work, the state accident insurance kicked in and is currently paying me some disability pension.

However this incident left my neck extremely susceptible for any kind of blerk. So when I have the flu or some similar nasty bug that decided to give me sore muscles, my neck stiffens up in a way that makes any slight movement a 10 out of 10.

It's gotten better now, I can move my head again (which I could not on Friday)
So no need to shoot me yet.

Oh so neither you or Brumby are outta the woods just yet so the wife has 2 bullets to polish which is great as she won't be polishing mine !   

[capt bullshot]

I set my lab supply to 40V/5A

Push it beyond 'Chinese' power spec for a start and it blew up the FET Even the specs for the current one at 200V and 20A maximum just because that is the peak specs of the FET which is clearly  Characterizing the device with increasing loads and how it behaves toward the stated 150W would be much more appropriate than just chucking a 40V input at it.

Some of the high frequency hash shown is maybe from his nameless power supply or poor scope technique. 

But he reached HIS conclusion based what he wanted to find was the fault not looking elsewhere to what may have contributed. There is nothing written on what in his opinion is at fault with the design just that it must be 'because reasons'.

Yes, after reading his blog entry, I wasn't too convinced of his knowledge and skills.

[Brumby]

Oh so neither you or Brumby are outta the woods just yet so the wife has 2 bullets to polish which is great as she won't be polishing mine !   

I'm feeling MUCH better!!  Really I am!!!!

[Saskia]

@mnem ugly typo. It's 5 figures (bloody thick fingers) which is still excellent over here.
@tautech
@Brumby I suffered major spine injury when a VW Tuareg driver decided to rear end me. He said that he was not to blame, as I did not get out of his way  fast enough.
Yeah, right.
So this got me a very severe whiplash thingie that led to neurological damage to my left arm and my neck, left my legs paralyzed for a week, my arm paralyzed for a couple of years, and since this happened on the way from work, the state accident insurance kicked in and is currently paying me some disability pension.

However this incident left my neck extremely susceptible for any kind of blerk. So when I have the flu or some similar nasty bug that decided to give me sore muscles, my neck stiffens up in a way that makes any slight movement a 10 out of 10.

It's gotten better now, I can move my head again (which I could not on Friday)
So no need to shoot me yet.

Oh so neither you or Brumby are outta the woods just yet so the wife has 2 bullets to polish which is great as she won't be polishing mine !   

the least you can do is engrave the name on the bullet. ...

[beanflying]

Starting to rough out a case based on the current Load. Block form layout so I know what bits I need to fit inside the enclosure. Then tweak it when the new one gets in. One Beer and two brain cells died to create this in 10-15 minutes

[tautech]

Oh so neither you or Brumby are outta the woods just yet so the wife has 2 bullets to polish which is great as she won't be polishing mine !   

I'm feeling MUCH better!!  Really I am!!!!

Yeah but after 3 weeks doing shit all trying to get my back right my bullet was getting too damn shiny so the distraction for her was most welcome. 
The last few days getting progressively better and getting back onto tarting up the house has had her focussing on you and Saskia and I know from experience the threat of a well polished bullet has a faster effect on getting you well than any drug ! 
GWS !

@mnem ugly typo. It's 5 figures (bloody thick fingers) which is still excellent over here.
@tautech
@Brumby I suffered major spine injury when a VW Tuareg driver decided to rear end me. He said that he was not to blame, as I did not get out of his way  fast enough.
Yeah, right.
So this got me a very severe whiplash thingie that led to neurological damage to my left arm and my neck, left my legs paralyzed for a week, my arm paralyzed for a couple of years, and since this happened on the way from work, the state accident insurance kicked in and is currently paying me some disability pension.

However this incident left my neck extremely susceptible for any kind of blerk. So when I have the flu or some similar nasty bug that decided to give me sore muscles, my neck stiffens up in a way that makes any slight movement a 10 out of 10.

It's gotten better now, I can move my head again (which I could not on Friday)
So no need to shoot me yet.

Oh so neither you or Brumby are outta the woods just yet so the wife has 2 bullets to polish which is great as she won't be polishing mine !   

the least you can do is engrave the name on the bullet. ...

Can do, Dremel or electric prick punch engraver ? 

[BU508A]

nice bonnet for our Tek-Smurf. And it is blue! 

https://www.ebay.com/itm/254492671252

[bd139]

Is that some form of religious headwear? 

[BU508A]

I think, mostly to impress Smurfette. 

[beanflying]

Oh so neither you or Brumby are outta the woods just yet so the wife has 2 bullets to polish which is great as she won't be polishing mine !   

I'm feeling MUCH better!!  Really I am!!!!

Only because you are much better and it's in your neck of the woods eBay auction: #114699700885

Comes with a Battery option wonder how much secret sauce has made its way out in the last few decades 



Oh the Horror eBay auction: #184670959716 

[mansaxel]

Is that some form of religious headwear? 

It's the reusable IKEA shopping bag. AKA "chav duffle bag". We have laundry in ours; strictly at home only. (The yellow ones are for use in-store, the blue ones you can buy and use to carry stuff home. )

[Zucca]

EDIT - Power Supply in question - wonder where the spikes came from 

https://www.eevblog.com/forum/testgear/mastech-dc-power-supply-hy3005dx-cheap-and-very-impressing!/msg493821/#msg493821

Lord have mercy I am a sinner.

[BU508A]

EDIT - Power Supply in question - wonder where the spikes came from 

https://www.eevblog.com/forum/testgear/mastech-dc-power-supply-hy3005dx-cheap-and-very-impressing!/msg493821/#msg493821

Lord have mercy I am a sinner.

Looks like, that the pictures are gone in that posting of yours.

[Zucca]

I know I was young with no experience. Honestly I could not care less... that PSU is a POS.

[Brumby]

Only because you are much better and it's in your neck of the woods eBay auction: #114699700885

Comes with a Battery option wonder how much secret sauce has made its way out in the last few decades 

Like I need another DFM to repair.

(Now on my watch list. )

[nixiefreqq]

Only because you are much better and it's in your neck of the woods eBay auction: #114699700885

Comes with a Battery option wonder how much secret sauce has made its way out in the last few decades 

Like I need another DFM to repair.

(Now on my watch list. )

yuck!   POS alert!

hold out for a 5326 or 27.  or a 5316 even.  (5328's bored the shit outa' me so i gave away my whole stack....but they are much better counters)

EDIT   ...  never mind.  my mistake.   thought it was a 5314a.   should have taken a closer look before i stuck my foot in it.

[med6753]

nice bonnet for our Tek-Smurf. And it is blue! 

https://www.ebay.com/itm/254492671252

$22 USD to ship a plastic bag from Spain. 

[Specmaster]

After 20 years of stewing in muh own juices, it'll be a long while before I hate winter.
mnem

You paint a gorgeous picture, , but its all true, I concur with that feeling, it isn't nice.