The mission has been scrubbed until early next year. The cause of the abort is as follows:
1. During the high winds, we put the countdown on hold and began draining the fuel tank.
2. As the fuel tank was draining from the 1st stage RP1 tank, a faulty pressurization valve caused a vacuum condition in the tank.
3. This caused the fuel tank section of stage 1 to deform and suck inward.
Very painful to watch. Like in those movies when someone takes a hammer to a brand new ferrari. These sort of things should be divinely protected.
Thankfully there does not appear to be any other damage. The rocket will have to be lowered and placed in the hanger for thorough inspection.
Current expectations for the next launch attempt is late January.
'til next time.
Tuesday, December 20, 2005
Mission Abort Summary
Monday, December 19, 2005
Countdown on hold at T-Minus 15 minutes
Winds are maintaining 28 knots. This is too high and we are holding the countdown to evaluate options.
The sun rising at t-minus 15 minutesLOX boil-off picking up
You can see how the winds cause an enormous change in the amount of LOX boil-off.
15 minutes ago, with low winds (7-15 knots)
Current winds (20-30 knots)T-minus 27 minutes. Digg It!
Winds starting to pick up
We are now getting peak winds at 28knots. This is not good.
The highest winds we want to launch in is 24 knots. The wind is erratic though. An hour ago we were at 7 knots.
T-minus 33 minutes.
T-Minus 40 Minutes
Falcon at T-minus 40 minutesRocket being fueled
The webcam has been closed to the public due to the intense demand to see it. I'll post screenshots as things change.
LOX tanks are almost full in both stages. The boil-off is very low today. We've almost filled the rocket and we've only used one tank. On the last attempt we went through three tanks because of the high winds and heat of the day.
Falcon 1 at 6am Kwaj timeIt's a Beautiful Morning
Falcon 1 on the launch padIt's 5:30am, Kwaj time. T-Minus 90 minutes.
Stage 2 is almost completely fueled. They are just about to start on Stage 1 (the bigger, lower part of the rocket).
The Control Room
Elon and me at the Rocket yesterdaySpirits are much calmer this time than last. Confidence is high and everyone is on.
All systems are go.
T-minus 80 minutes. Digg It!
Sunday, December 18, 2005
Why we like Rockets
When most people (read: men) think of rockets, they think “Mmm… Rockets…” Rockets have this innate appeal that can sometimes be difficult to explain (to women).
Maybe it’s the shape. That’s what some people (read: women) would say. I don’t think it is though. It’s definitely a cool shape, but there are a lot of long, tubular-shaped items that don’t generate the same excitement. Pencils have a similar shape, but I don’t see anyone with posters of their favorite pencil, and toy stores with giant plastic pencils for kids to play with.
Umm... It just doesn't do anything for me.
Even Pencil-Cases have rockets on themIt could be their destination. Space is definitely cool. But after spending time with rocket scientists, they are generally not the philosophical types spending their evenings gazing at the stars. They’re a pretty intense bunch. They’re out to make the rocket do its job.
Stargazers? They don't even have windows to the outside.I think the real reason is that it’s because rockets go very fast, make a lot of noise, and most importantly, occasionally blow-up. These guys are basically building very, very expensive fireworks. Bombs at the end of a stick. The fact that those sticks, if designed properly, can be propelled in a specific direction, make it even cooler. But at the end of the day, things can go wrong. And when they do, they go wrong in a very, very big way.
Things going wrong in a big way.So I thought I’d take everyone through what can go wrong. Just in case you didn’t know that this is fairly common. In fact, since the start of the rocket industry, there have been 687 failures in the categories: Pad; Launch; Orbital; Mission; and End-of-Mission Failures.
I also thought I’d rank them in order of coolness. #10 would the most lame, and #1 would rank similarly to the first time you saw fireworks. In other words: blow your mind cool.
#10: We run out of LOX again. This would be painfully lame. Thankfully, we’re so embarrassed about the last time that we’ve brought enough LOX to Kwaj in the past two weeks to launch the rockets 4 times over.
#9: We run out of something else. This is the middle of nowhere, as I’ve mentioned in the past. So this is possible. But man that would suck.
#8: Wind causes us to abort the launch. Current winds in Kwaj vary from 15 to 30 knots. Anything over 24 knots is considered unfavorable.
The rocket needs to clear the launch mount that holds it in place. As it launches, wind can push the rocket against the mount. We would be forced to abort the launch if the winds do not cooperate.
So, assuming we don’t run out of something or abort, let’s get on to the other things that can and have gone wrong with rockets…
#7: The rocket launches, goes into space, and but does not release the satellite. This happened recently in 1999 when Lockheed's Athena rocket's nose fairing failed to separate and the extra mass caused it to re-enter the atmosphere and fall back to earth.
#6: The rocket doesn’t go where it’s supposed to go. It goes up, it goes into space, just not where we want it to go.
#5: The on-board computer incorrectly turns the rocket engines off in mid-flight. Sounds ridiculous, but it has happened before. On September 10th, 1998, a rocket carrying twelve communication satellites fell to the ground when a faulty command was issued in the control system, shutting down the engines. It turns out rockets are actually quite heavy. It landed somewhere in northern Russia with a loud thud.
#4: Stage 1 fails to separate. This is quite common. Almost 30% of all rocket failures are due to a problem when stage 1 needs to be set free. Sometimes stage 1 hangs on by a thread (albeit a very strong thread) and is dragged as far as it can until the rocket eventually gives up and falls back down to Earth. This happened recently in 1999, when a Boeing upper stage vehicle failed to separate correctly.
If it doesn't separate, stage 1 makes for a pretty serious anchorOkay. So that takes care of the un-entertaining failures. One's that would are bad, but not something we can experience first-hand. Now, on to the one’s we all want to be able to casually bring up with our friends afterwards.
As in, “Hey Bob, you know what I saw this week-end..?”
At #3:
The rocket takes off at the wrong angle, flying across the atoll into the ocean and blowing up.
Lockheed Martin's Trident 2Going for a spin.
#2: The rocket launches, and then blows up in the sky. Pretty cool.
Boeing's Delta II 17 January, 1997Now that's what I call a firework
And #1, with a combination of being the most spectacular and the most damaging:
The rocket launches a few feet and then falls back to the ground, completely obliterating the launch pad and the rocket in a giant fireball. For this, you have to see the video:
[Lockheed Martin's Titan going boom on the launch pad]
For other videos of similar failures, check out this website.
At the end of the day, this is all things that happen a lot in the industry. I've been amazed by how tolerant the industry is of this level of reliability. Insurance is a significant part of the cost in a launch vehicle. That way, if something goes wrong, they're covered to do it again. Nobody likes the risks, but frankly there's no alternative. The only way to get something up into space is at the tip of a highly volatile rocket.
By the way, I got all this information directly from the SpaceX guys. They know these failures like the back of their hand. They know why they happened, when they happened, and every detail on how they could have been prevented.
They don't intend to let it happen to them.
Launch in T-Minus 18 hours.
*****
Note: this blog is for entertainment purposes only and intended only for viewing by my friends. This is not endorsed by SpaceX, or part of SpaceX's official communications. Please don't trust a word I say. Really. For all you know, I'm making it all up and I'm actually sitting in my basement somewhere in Boulder. Digg It!
Kwaj-Rockets: Take 2
We're back on island. It's still beautiful, and it's still surreal, but this time we're going to see a rocket launch!
The team is rested after a much needed break. Some went home to California, some went to Hawaii, and some stayed in Kwaj. Wherever they went, they're here now refreshed and pumped up.
The SpaceX Team on the island this morningSaturday, November 26, 2005
Post-Launch Summary
It is a frustrating day, but in truth, the chance of a brand new rocket launching from a brand new launch pad on its first try was exciting, but unlikely.
Here's the summary of the cause of the abort from Elon:
"What happened was that an auxiliary liquid oxygen (LOX) fill tank had a manual vent valve incorrectly set to vent. The time it took to correct the problem resulted in significant LOX boil off and loss of helium, and it was the latter that caused the launch abort. LOX is used to chill the helium bottles, so we lose helium if there is no LOX to cool the bottles.
Although we were eventually able to refill the vehicle LOX tanks, the rate at which we could add helium was slower than the rate at which LOX was boiling away. There was no way to close the gap, so the launch had to be called off. In addition, we experienced an anomaly with the main engine computer that requires further investigation and was arguably reason in and of itself to postpone launch.
The next launch attempt is expected to occur in approximately mid-December, depending on the time required to resupply LOX and helium."
----------
In the end, what I saw was a team of very smart and experienced people, making each decision after careful consideration. No one wanted to abort, but in this business, you always do the right thing.
Expected Launch Date
Based on the ensuing discussion after the abort, the team expects to get new LOX and helium delivered in time to allow for a launch in mid-December.
Digg It!LOX tanks are full
We are on hold at T-minus 10 minutes to refill Helium tanks and other procedures.
Digg It!The Money Shot
We're T-minus 25 minutes. There is no turning back now.
They are refueling both the LOX and the RP1.
During the operation, they unloaded about 15% of the RP1 from the rocket tanks. The reason they did this was because the LOX tanks and the RP1 tanks are adjacent to each other. If the RP1 tank is full, the fuels effect each other's temp. With a temperature differential between the LOX and RP1 of about 400F, that causes the LOX to boil-off much faster.
Since the race was to finish the operation before all the LOX boiled off, this move bought them some time. The LOX burn-off went from 8 gallons per minute to 4 gallons per minute. The delay took three hours in all. That's 750 gallons saved.
I told you they were smart.
T-minus 20 minutes.
T-Minus 45 Minutes to Launch!
A very stressful thumbs upLaunch time is now 12:50pm Kwaj time, 4:50pm CA time.
Man. Tense doesn't even come close to describing it. Digg It!
Procedure in process - Team is still on the island
The problem has been fixed and team has started the operation to refill the LOX into the high-pressure tanks. The back-up LOX is stored in low-pressure tanks, so it needs to be pressurized.
Once it is in the pressurized tanks, they can then start refueling the rocket. Even though the rocket was full at countdown, refueling is necessary because of boil-off.
No status yet on timing.
Every minute counts as they race to stay within the launch window.
The Team is on the Island
The team is on the island and they are working on the problem.As a result of the LOX burn-off during this process, we are now in do-or-die mode. If we do not get this procedure done before the launch window closes, the launch is off until a new shipment of LOX can be brought in.
The team here are some of the best in the industry. If it can be done, it will be done. Digg It!
Waiting for the crew
The camera is now trained on the dock where the crew will arrive. They should get there any minute.
Status 11am
The team has been approved to land on the island. They are on their way.
The operation is expected to take 2 hours.
Once the operation is complete, they will be able to reassess whether the launch can occur today.
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