Tag Archives: Orbiter

15 Days in January – Day 15

28 Saturday Jan 2012

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(NOTE: The following is a fictionalized account of the 15 days in January 1986 leading up to the Challenger Space Shuttle disaster on the 28th of that month; however, the details of weather and NASA events are based on known historical data.)

Titusville, Florida
Tuesday, January 28, 1986
High Temp: 46° F Low Temp: 32° F

Challenger and crew clear the tower

Where do I start? Seven amazing, wonderful, smart people lost their lives today. None of us can come to terms with the reality of what happened.

The morning was cold. We opened the water valves on Launch Pad 39B overnight to keep the lines from freezing and ice was all over the pad. Still, that should have not been a problem, nor caused a disaster. We had a delay of two hours because of an equipment failure on the pad, but the fuel and crew were loaded normally and Challenger launched at 11:38 AM.

Ice on Launch Pad 39B after water release to protect pipes

There were no warnings, no alarms, no indication of a problem. At 73 seconds after liftoff a massive cloud surrounded the vehicle and we lost sight of it. Then the Solid Rocket Boosters (SRBs) emerged at the top of the cloud and continued on followed by pieces of debris. We knew that something had happened but it was over a minute before it became apparent that the Orbiter had not survived.

The impact on everyone was a wall of emotions. The feeling of loss because the seven astronauts were our family. The feeling of empathy for the astronaut’s families for their loss. The feeling of anxiety as to if there was something we did that caused this tragedy and the need to find answers as quickly as possible. The loss was made even harder as we all watched helplessly seeing the remains of STS-51L fall into the ocean. Many of us held out hope of the miracle until it became apparent there would not be one.

Much of what happened does not make sense. Any rocket-based vehicle is a flying explosion waiting to happen, but everything possible is done to keep the volatile chemicals from interacting until they reach the nozzle. The cloud was apparently the result of a sudden burn of fuel from the External Tank, which doesn’t necessarily mean it was a violent explosion. If there was an explosion, why did the Solid Rocket Boosters (SRBs) escape, seemingly untouched. Challenger has been cursed with Main Engine problems, so some wonder if one of them failed causing the External Tank (ET) to breach and the fuel to burn, but again, why didn’t the SRBs also explode? 

There has been discussion that the cold might have caused a problem with the seal around the joint of a SRB, but why would that destroy the External Tank (ET) and Orbiter, but have seemingly little or no impact on the SRBs? It is apparent that the ET is key to explaining what happened. A joint could fail and hot gas escape that is aimed directly at the ET, which could cause an explosion, but a joint is 360°around and less than 25% of a joint faces at or near the ET. Odds of a first time failure of a joint facing the ET after 25 missions are ridiculously low.

STS-51L Christa McAuliffe, Gregory Jarvis, Judy Resnik, Mission Commander Dick Scobee, Ronald McNair, Pilot Michael Smith, Ellison Onizuka in White Room on 8 JAN 1986

The biggest question on everyone’s mind is the one no one wants to discuss. What happened to the crew? The Orbiter and ET emerged from the cloud in fragments and some were large enough to be the area where the crew sat during launch. Most of us believe that they were killed instantly, but no one will rest peacefully until we know what happened to them. 

The scope and breadth of this tragedy is far beyond what I could have imagined. Somehow we all have to move forward, but we’re all trying to deal with what happened. Moving forward doesn’t seem possible, right now. The first step in moving forward will be to understand what happened.

TOMORROW: What Happened to STS-51L

15 Days in January – Day 7

20 Friday Jan 2012

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(NOTE: The following is a fictionalized account of the 15 days in January 1986 leading up to the Challenger Space Shuttle Disaster. The character’s account is fictional; however, the details of weather and Space Shuttle events are based on known historical facts.)

Titusville, Florida
Monday, January 20, 1986
High Temp: 66° F Low Temp: 48° F

Challenger atop the Boeing 747 on April 18, 1983

We are now four days from the launch of Challenger on the STS mission 51L. The decision was made to push back the date to Friday the 24th. I think that will be a great way to end our week. 

Challenger is our second space-qualified Orbiter. Columbia was the first. Challenger has been responsible for nine of 24 completed missions, and at times Challenger has been challenging.

Challenger rolls out to Launch Pad 39A for maiden voyage (8 DEC 1982)

While most civilians know Challenger by its name, we know it as OV-099 (technically:  Orbiter Vehicle-099;) however, that was not its original designation because initially it was not intended to fly.

Because of the lack of computer simulations, STA-099 (Structural Test Vehicle-099) was built to be a full-scale test model to determine if the design would meet stress expectations without failing. The contract to build it was awarded on July 26, 1972, but construction didn’t begin until November 21, 1975. After a year of testing was decided that it would be quicker and less expensive to refit STA-099 for space flight rather than rebuild the original air-flight test vehicle we know as Enterprise (OV-101.) The conversion of STA-099 to OV-099 began on January 28, 1979, which, in eight days, will be exactly seven years ago.

Repairing/replacing Challenger's main engines before its maiden flight

Challenger rolled out of the Palmdale assembly facility on June 30, 1982 and arrived at KSC on July 5th. Challenger was prepped for its first flight, which was scheduled for January 20, 1983, but while it sat on Launch Pad 39A testing revealed a hydrogen leak in one of the main engines. Subsequently, Challenger had to have her main engines removed for repairs while sitting on the launch pad. One of the engines had to be completely replaced.

Challenger problems did not end with the engines. A severe storm contaminated the payload while she sat on the pad. The payload had to be decontaminated. Challenger finally was successfully launched on her maiden flight on April 4, 1983, 51 months after the conversion began.

More on this ship’s history tomorrow.

15 Days in January – Day 6

19 Thursday Jan 2012

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(NOTE: The following is a fictionalized account of the 15 days in January 1986 leading up to the Challenger Space Shuttle Disaster. The character’s account is fictional; however, the details of weather and Space Shuttle events are based on known historical facts.)

Titusville, Florida
Sunday, January 19, 1986
High Temp: 73° F Low Temp: 60° F

STS-51L Challenger crew for the next launch

For most Americans Sunday should be a day of rest, but for us on the Launch Pad it is not. It’s hard to describe the workload on the Pad workers right now. This next flight will be our first off Pad 39B, which means we are breaking in a new launch pad at the same time we are trying to get the program back on schedule.

After Challenger launches we will have two launch pads operational and another one that will become operational at Vandenberg AFB in six months. We will need all three launch pads if we are going to be able to meet the needs of the ramped up space program. We are in the process of training a lot of people to staff all three launch pads but after we have a few launches under our belt it will all fall into place.

Challenger in VAB ready to be lifted

Each Orbiter goes through a series of ‘handoffs’ as it moves through the launch preparation phases. The current mission’s Orbiter, Challenger, landed at Edwards AFB on November 6, 1985, which ended its STS-61A mission. It was then prepped for riding on the back of a Boeing 747 back to Kennedy Space Center (KSC) where it arrived on November 11th. Challenger was then put in the Orbiter Processing Facility (OPF) for just over a month where it was prepped for this mission. On December 16th it was moved to the Vertical Assembly Building (VAB) where the External Tank (ET) and the two Solid Rocket Boosters (SRB’s) were mated to the Orbiter. Six days later (December 22, 1985) STS-51L rolled out to Launch Pad 39B where it is our job to prepare and maintain the ship until it launches next week.

Each ship goes through the same process. To have two launches a month, as is our goal, we will become a factory-like operation that flawlessly performs every duty, every day, 24 hours a day. We will truly be the most unique cargo operation in the world and the most vital for our country. We learn as much science and technology from every launch as the real scientists who fly our ships into space. With every new launch we are revising, updating and perfecting our skills.  Twenty years from now my children will know that their Dad was one of the people who made America the country that has the best, and possibly only, space port in the world! It makes me proud to be a part of history.