Author Topic: Wayne Hale sets up his own blog site  (Read 231945 times)

Offline psloss

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Re: Wayne Hale sets up his own blog site
« Reply #400 on: 10/01/2013 01:22 AM »
And looks like a great new series on STS-93!
http://waynehale.wordpress.com/2013/09/30/sts-93-and-the-flight-director-office/
I wish I'd kept more of the mission status briefings over the years, but this one was hard to forget because of that "all-eventful" ascent.  I guess since Wayne was MOD for the ascent/entry shifts he got to sit next to Mr. Austin in the briefing, too.

Offline Jester

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Re: Wayne Hale sets up his own blog site
« Reply #401 on: 10/10/2013 07:32 PM »
For those on L2
http://forum.nasaspaceflight.com/index.php?topic=6817.0

The all-eventful STS-93 launch - with MCC loop and overview video and graphics

Offline Lee Jay

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Re: Wayne Hale sets up his own blog site
« Reply #402 on: 10/10/2013 07:55 PM »
For those on L2
http://forum.nasaspaceflight.com/index.php?topic=6817.0

The all-eventful STS-93 launch - with MCC loop and overview video and graphics

My all-time favorite item on all of L2.

Offline Chris Bergin

Re: Wayne Hale sets up his own blog site
« Reply #403 on: 10/27/2013 11:58 PM »
Oh yes! Mr Hale on STS-93....starting with this first attempt that pretty much everyone's seen on youtube:

http://waynehale.wordpress.com/2013/10/27/sts-93-keeping-eileen-on-the-ground-part-1/

The launch itself was dramatic. Mr Hale and L2 members may want to check out this video they started to use for training purposes. Amazing MCC loop showing how well they can work issues.


http://forum.nasaspaceflight.com/index.php?topic=6817.0

Offline psloss

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Re: Wayne Hale sets up his own blog site
« Reply #404 on: 10/28/2013 10:59 AM »
jcopella's post is also relevant to the first launch attempt (in a thread about another "eventful" countdown):
http://forum.nasaspaceflight.com/index.php?topic=2078.msg51803#msg51803


Offline wjbarnett

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Re: Wayne Hale sets up his own blog site
« Reply #406 on: 02/01/2014 08:15 PM »
« Last Edit: 02/01/2014 08:17 PM by wjbarnett »
Jack
Twitter: wjackbarnett

Offline elmarko

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Re: Wayne Hale sets up his own blog site
« Reply #407 on: 02/27/2014 10:24 AM »
I'd love to see the next part of STS-93, if you're reading this Wayne :)

Offline Wayne Hale

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Re: Wayne Hale sets up his own blog site
« Reply #408 on: 10/12/2014 01:27 AM »
Started up again . . .

Offline wjbarnett

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Re: Wayne Hale sets up his own blog site
« Reply #409 on: 10/12/2014 12:52 PM »
Thanks Wayne! I especially enjoyed the http://waynehale.wordpress.com/2014/09/18/manifest-destiny-or-pipe-dream/ entry, as you revealed more of yourself, your history, motivations, aspirations and dreams. I, for one (among many, it appears), share so much of that too. I grew up consuming huge quantities of SF. I became an engineer in similar purpose (~8 years behind you), though was deflected from space in my early career and never returned, except for eagerly watching, following you and your comrades, and cheering (and crying) for the accomplishments and the losses too. I too believe in our human destiny to explore, to take risks, and eventually to occupy the entire solar system, and hopefully beyond. But I also enjoy studies of history and realize it took a hundred plus years, and uncountable lives lost, after 1492 before Europeans were able to live out their natural lives in the 'new world'; and there were people, and fuel, and food, and water, and breathable air here already in that case. So yes, I agree whole-heartily, it is the "young people with their enthusiasm and creativity [that] are our future." Thanks so much for sharing and passing along your lessons learned to the next generations. We are all depending upon them!
« Last Edit: 10/12/2014 01:09 PM by wjbarnett »
Jack
Twitter: wjackbarnett

Offline psloss

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Re: Wayne Hale sets up his own blog site
« Reply #410 on: 10/12/2014 03:08 PM »
Started up again . . .
Thanks -- especially like the additional detail about the STS-78 case, which as you noted hasn't been elaborated on in public that much.  There was one online reference I stumbled over a couple of years ago in one of the STS-106 FRR presentation slides, but "Powerpoint" slides always make me think of cue cards rather than the full, delivered presentation:
http://www.jsc.nasa.gov/news/columbia/frr/sts-106/03_integration.pdf


Offline psloss

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Re: Wayne Hale sets up his own blog site
« Reply #412 on: 10/21/2014 11:58 PM »
Thanks for the heads up -- I was two posts behind.  This last post reminds me it's been five years (give or take a few weeks) since STS-129.  One of the distinct memories was falling behind trying to take notes during each run while listening to the flight director loop.  (And I only had to listen to one channel of communications.)

Offline Jester

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Re: Wayne Hale sets up his own blog site
« Reply #413 on: 10/26/2014 03:44 PM »
Mandatory STS-93 reading for the weekend:


http://waynehale.wordpress.com/2014/10/08/understanding-sts-93-the-key-is-mixture-ratio/

http://waynehale.wordpress.com/2014/10/11/sts-93-dodging-golden-bullets/

http://waynehale.wordpress.com/2014/10/17/sts-93-dualing-computers/


and more is coming ;)

Wayne Hale ‏@waynehale 18h18 hours ago
Reliving STS-93 through video recordings so I can blog about it. Drives my heart rate up as always. 15 fps underspeed, OMS -1 not required.
« Last Edit: 10/26/2014 04:06 PM by Jester »

Offline Jester

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Re: Wayne Hale sets up his own blog site
« Reply #414 on: 10/26/2014 04:06 PM »
As STS-78 came up, I pulled the MER IFA (rest on L2) for 2 points:

Title: MDM FA1 BITE During Ascent

Summary: At approximately 172:14:54 G.m.t. (00:00:05 MET), a built-in test equipment (BITE) bit was set on multiplexer-demultiplexer (MDM) flight critical aft (FA) 1
card 14. This bit is indicative of a problem in the analog to digital (A/D) converter in the sequence control unit (SCU) or a problem in card 14. However,
simultaneous with this BITE, the Space Shuttle main engine (SSME) 1 liquid hydrogen (LH2) inlet pressure failed off-scale high (OSH) (reference MER-02).
This pressure measurement is channelized through card 14 (channel 16). Analysis of the BITE logic indicates that an OSH voltage from this sensor will cause
the BITE indication on MDM FA 1. Thus, this BITE is an explained condition. A similar failure was observed on STS-51 [SSME 2 liquid oxygen pressure (LO2)
inlet pressure] that resulted in the same BITE indication on MDM FA2.
MER


Title: SSME 1 LH2 Inlet Pressure Failed OSH

Summary: At 172:14:54 G.m.t. (00:00:05 MET), the Space Shuttle main engine (SSME) 1 liquid hydrogen (LH2) inlet pressure (V41P1100C) failed off-scale high. This
failure resulted in the MDM FA1 BITE (MER-01). The failure could be caused by the sensor, wiring between the sensor and the dedicated signal conditioner
(DSC), or the DSC. The other three measurements on the DSC card did not exhibit anomalous behavior.
A similar malfunction occurred on SSME 2/FA2 during STS-51, and was caused by a generic failure mode that occurred in the transducer. The transducer
that failed during STS-51 was an older design than the one installed this flight. The new design should have this particular failure mode corrected.
KSC troubleshooting isolated the problem to a failed pressure transducer. The transducer was removed and replaced.


Offline Jester

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Re: Wayne Hale sets up his own blog site
« Reply #415 on: 10/26/2014 04:16 PM »
And on the STS-93 screw/wire mentioned here: http://waynehale.wordpress.com/2014/10/17/sts-93-dualing-computers

Title: AC1 Phase A Short

Summary: At approximately 5 seconds into the launch of STS-93, a momentary short occurred on AC1 phase A. The duration of the short was approximately 500 ms. A
current spike in excess of 20 amps and a voltage drop from 114 to 21 VAC was observed on AC1 phase phase A. Coincident with the short, the SSME 1
(center) controller A and SSME 3 (right) controller B failed. Additionally, the H2O loop light on the C/W F7 panel was momentarily activated and a FC 1 pH
BFS message was received. After MECO, the crew looked at the circuit breakers on panel L4 and reported that no circuit breakers were out of position.
Data evaluation determined that there was no loss of function in any of the Orbiter equipment that was powered by AC1 during ascent. Both the H2O loop
light and the FC 1 pH message were determined to be symptoms of the undervoltage on AC1 phase A resulting from the short. There was no restriction on
the use of AC1 for the remainder of the mission.
During flight day 3, the crew reported that the AC1 phase A circuit breaker for SSME 1 controller A was actually open. With this information, the source of the
short could be isolated between the circuit breaker and the SSME 1 controller A. The AC1 phase B and C circuit breakers for SSME 1 controller A were
opened for entry to protect against an inadvertent powering of the controller.
A postflight troubleshooting plan was developed and it was determined early on that the short was on the Orbiter side of the SSME 1 interface panel. The
short was isolated to a damaged wire in the port wire tray at the midbody bay 11/12 frame. Analysis of the damaged wire indicated that the damage was the
result of a single mechanical event. It was initially suspected that the damage was caused by vibration induced chaffing against the head of a torque-set
screw used to secure the wire tray to the frame. At the short location, the screw head showed obvious signs of arcing. Wire damage at a second screw head
(about 2 inches away) was also observed, but there was no evidence of arcing.
Additional inspections found damage on a wire at the same location in the starboard wire tray. This damage appeared to be caused by wear. As a result of
this failure, the decision was made to inspect and protect the wire harnesses in the vehicles throughout the fleet.

Offline Jester

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Re: Wayne Hale sets up his own blog site
« Reply #416 on: 10/26/2014 04:16 PM »

Offline JSC Phil

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Re: Wayne Hale sets up his own blog site
« Reply #417 on: 10/26/2014 10:14 PM »
Wayne has written up STS-93.

http://waynehale.wordpress.com/2014/10/26/sts-93-we-dont-need-any-more-of-those/

I highly recommend the L2 video with the FCR loops including the Booster and other backroom loops, including John's "We don't need any more of these" comment.

http://forum.nasaspaceflight.com/index.php?topic=6817.0

Offline Wayne Hale

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Re: Wayne Hale sets up his own blog site
« Reply #418 on: 10/27/2014 01:54 PM »
I really wanted to refer to the L2 integrated video of the MCC calls during the STS-93 ascent, but it is still behind the NSF paywall . . .  any chance you could put that on the free part of the site?

Offline Chris Bergin

Re: Wayne Hale sets up his own blog site
« Reply #419 on: 10/27/2014 03:16 PM »
I really wanted to refer to the L2 integrated video of the MCC calls during the STS-93 ascent, but it is still behind the NSF paywall . . .  any chance you could put that on the free part of the site?

Sure. I'll upload it to youtube in 10 minutes.

PS It's not a paywall, it's a place where supporters of the site gain access to access to all our database (which would bankrupt us if everyone could use it).
« Last Edit: 10/27/2014 03:23 PM by Chris Bergin »

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