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Comment You learn the variation that's in front of you (Score 1) 344

Having responded to many wrecks of various cars in various states of being destroyed, you learn the variation that is in front of you. You're trained to know the difference between an electric, hybrid, or gas/diesel car, and you're trained to look for airbags in modern cars (taking the roof off? don't cut through an undetonated curtain airbag cylinder!). If you know what to look for (and first responders are trained in this), it's pretty easy to be able to see where it's safe to cut with the jaws and where you need to steer clear. Furthermore, there's a compounding factor in car design that reduces the electrical hazard to first responder crews: collapseable steering columns. If someone is pinned by the steering wheel, you may have to cut the lower frame of the car at the base of the A pillars to literally bend the car in half (the steering wheel moves with the front wheel/frame/engine assembly, so you bend that away from the trapped occupant, giving more room). However, this situation is less likely now than it was with non-collapseable steering columns (you're more likely to be able to just pull/bend the busted column away from the person without cutting the chassis). They're not going to put EV electrical conduits in the doors or upper parts of the frame (that's just extra wiring; the power's going to the wheels after all), so that's about the only time you'd be in trouble for an extrication. tl;dr: The way cars are made now this risk is low in the first place, and the first responders know what to look out for to keep themselves safe.

Comment Re:T800 (Score 1) 70

It's actually the other way around. They're designing the robot to put identical physical inputs into hardware that humans would. This allows them to test said hardware (like a chemical suit, for example) in real, hazardous environments, and to stress that hardware in ways it would be stressed in the real world, but without putting a human test subject's life at risk.

Comment Re:Before anyone else says it... (Score 1) 132

So, you've applied power to a heat pump to extract heat from the cold side (where your CPU is) to the hot side. Now you have a hot side that needs something to do with all that heat, or your system will run away. You cannot cool a spacecraft without off-gassing, evaporating, sublimating, or radiating, period.

Comment Re:DCX - SSTO (Score 1) 227

The Shuttle landing gear is spring/gravity deployed with a pyro backup...

... that fired on every single landing ever done by any space shuttle, since not getting the gear down falls in the way-not-good category for crew survival. You're right that they were technically a "backup," but they weren't contingency based, they fired every time.

Comment Re:Thanks, Space Shuttle (Score 1) 227

For starters, they had no business putting the shuttle on the side of the first stage. It should have been on the top from the start. That simple design change would have saved us a shuttle.

Well, it _was_ on the top from the start. Then budgets got cut, structures had to be lightened, and the only way to make the damn thing go up at all was to put it on the side. The amount of smug coming from your post should at least align with the amount of fact contained therein. Reference: Chris C. Kraft.

Comment Re:DCX - SSTO (Score 1) 227

If the space shuttle landing gears were deployed pneumatically they wouldn't be the space shuttle landing gears. While there is redundancy in the system, they're actually pyrotechnically actuated. Explosions are still the most reliable way to actuate anything because all that needs to happen is to manufacture a part correctly, not damage it/make it damage tolerant, and then release potential energy. Likely any landing gear needed for a spacecraft such as the Falcon would be similarly actuated, as there is no reason for retraction to occur outside of preparation for its next launch.

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