Falcon 9 Booster

A few nice machining China aluminum images I found:

Falcon 9 Booster

Image by jurvetson
The Falcon 9 booster tank is made of aluminum lithium alloy. Welding it without forming hydrogen bubbles is tricky. SpaceX uses friction stir welding throughout.

I had to crop the welding jig from the photo because of ITAR restrictions. Let me just say that it is very clever, and the challenges are like building a ship in a bottle.

I have also collected some interesting details on the Falcon 1 flights so far:

Flight 1: The booster engine cutoff early, and the rocket went only one mile up. The video of what happened next has not been seen outside SpaceX. Without stage separation, the whole rocket tumbled back to crash 300 ft. from the launch pad, causing a gigantic fireball. There are no people on the atoll during launches, but there were plenty of cameras catching the action, and the smoke that enveloped the entire launch area. The remains of the rocket were collected from the reef at low tide.

Flight 2: Programming mistake in the upper stage led to improper feedback control loops and it wobbled out of control.

Flight 3: While the lack of stage separation has been discussed, it is a bit more interesting. The upper stage ignited inside of the interstage coupler… and that destroyed the fragile upper stage bell (which is as thin as a Coke can).

Flight 4: Perfect flight, but ironically, the first without a real payload. The Malaysians sat this one out, and will fly their satellite in Flight 5. The dummy payload in this flight was machined aluminum with a realistic mass profile and was named the RATsat after the initials of the employees who cranked it out over a weekend.

After entering orbit, they restarted the sustainer motor, a capability test that was not pre-announced.

[Update: This post and text were before I had any involvement with SpaceX. And the subsequent Flight 5 was a total success, with accurate satellite deployment]

Flight 4 is memorialized in the Space X Music Video.

I gotta fly now… on a day trip to China…

Proton Pack

Image by clarksworth
Nearly finished as of April.

To go into overly nerdy detail, this is a replica of one of the few "hero" GB1 packs that survived being used in both the first and second films. The original packs had extensive detailing, as well as electrical and mechanical features. These heavy, bulky props were disliked by the actors (Murray especially), and so were largely replaced by much less functional, sloppy fibreglass casts for the second film. Although it’s difficult to spot on screen, the GB2-made packs have a much duller, less detailed appearance and are somewhat "wonky". The occasional GB1 surviving packs appear in closeup sequences. The GB1 packs originally sported a thick, unique ribbon cable whose source is unknown. By the time of the second film (as still today), this cable proved impossible to find, so was substituted by a cheaper alternative. The above prop reflects those changes, as well as approximates 5 years worth of wear – both fictional and accidental.

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