Shutdown

Shutdown: Not a Fanboi

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Someone clearly only likes one of their new toys.

Image via highpowerrocketry.

Shutdown

Shutdown: APC vs. Tank

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Although the after picture of the tank might just look identical to the before.

Image via highpowerrocketry.

Shutdown

Shutdown: Gif Week

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Welcome to Gif Week, an unofficial celebration that is simply the week where I happened upon five military weapon related gifs. Since there happen to be five Shutdowns in the week, what could we do but end with one a day?!

Gif via highpowerrocketry.

Moments in History

Big Bad Blackbirds

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The alternate title for this post should probably be Bill Weaver: The Biggest Badass You Might Not Know. What most of you likely do know is that the SR-71 was a) awesome, and b) developed after/with the single-seat A-12. Mr. Weaver’s tale harkens back to the early days of testing and wringing out the kinks of the SR-71. I don’t want to retell the entire tale, just wet your whistle and send you over to read for yourself, but let me assure you, the whole story is definitely worth reading!

The flight in question, which Weaver calls his “most memorable”, occurred on Jan. 25, 1966, and along with him was Jim Zwayer, who was a Lockheed flight test reconnaissance and navigation systems specialist. Those recon and nav systems were one test focus, and the other bits of beta testing were “procedures designed to reduce trim drag and improve high-Mach cruise performance. The latter involved flying with the center-of-gravity (CG) located further aft than normal, which reduced the Blackbird’s longitudinal stability.” Reducing stability usually doesn’t sound like a good idea, but it can offer performance enhancements in certain flight regimes, much like having a racecar drive “loose” can make a car a faster on a given track.

After in-flight refuelling for the second leg of their flight, and accelerating to Mach 3.18, they initiated a 35 degree banked right turn. It was at this point they experienced a benign sounding “inlet unstart”. That unstart was actually a bit of a big deal. In Weaver’s words, “the right engine inlet’s automatic control system malfunctioned, requiring a switch to manual control. The SR-71′s inlet configuration was automatically adjusted during supersonic flight to decelerate air flow in the duct, slowing it to subsonic speed before reaching the engine’s face. This was accomplished by the inlet’s center-body spike translating aft, and by modulating the inlet’s forward bypass doors. Normally, these actions were scheduled automatically as a function of Mach number, positioning the normal shock wave (where air flow becomes subsonic) inside the inlet to ensure optimum engine performance.

Without proper scheduling, disturbances inside the inlet could result in the shock wave being expelled forward–a phenomenon known as an “inlet unstart.” That causes an instantaneous loss of engine thrust, explosive banging noises and violent yawing of the aircraft–like being in a train wreck. Unstarts were not uncommon at that time in the SR-71′s development, but a properly functioning system would recapture the shock wave and restore normal operation.”

What if the aircraft was in a relatively hard right turn and the right engine unstart did not clear? Here is your teaser: “AS FULL AWARENESS took hold, I realized I was not dead, but had somehow separated from the airplane.” Got you curious to read the rest? Hit the jump and follow the link, plus bonus SR-71 links!!

Continue reading Big Bad Blackbirds

Shutdown

Shutdown: Who Yields First?

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My usual rules for right-of-way seen to not apply here, interesting.

Image via transpress nz.

Shutdown

Shutdown: Hydrant Hydra

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The multi-headed hydrant was always a popular stop for the loyal dog walkers.

Image via theospark.net.

Shutdown

Shutdown: Do Your Homework!

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If you don’t do your homework, no Mario for you!

Continue reading Shutdown: Do Your Homework!

Shutdown

Shutdown: Easy!

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If Asimov says it’s easy, it’s easy, okay?!

Image via the Tumblr Dinosaur’s Pen.

[As a side note, we may not have exciting new content on a daily basis, but we’ll try to give you a place for discussion! As always, off topic conversation is not only tolerated, but encouraged!]

Spaceheads

Take a Little Trip

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NASA wants us all to get out and see the worlds! And by way of encouragement, they have created some travel posters to showcase some of those worlds! (No word on how to actually get there, but I am sure PanAm is working something up.)

Continue reading Take a Little Trip

Moments in History

Things Are About To Get Weird

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For those of you following along on Facebook, you may have noticed our fearless leader’s caveat that posts may not be as frequent due to real life commitments. We all have those and, until recently, most of us have been able to find time to post a celebration of technology fairly regularly. However, life changes and sometimes it changes due to a new life.

Continue reading Things Are About To Get Weird

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