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Who Wants to Write on Glass?

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Every now and then, following our blog pays off in nontraditional ways. Sure, we're the place where knowledge junkies get their fix. But we're also the place to score free stuff! Today, we're giving away an unlimited number of invites to a cool Firefox plugin called WriteOnGlass. Here's how it works. Say you're browsing our blog and come across a post you want to share with all your friends. Sure, you could leave the browser and email everyone the link, but why not just leave a note, sort of like an e-post-it, right there on the page, which kicks off a conversation about the post with all your friends, who can comment back and add their own two cents?! Pretty awesome right?

Plus, if you happen to be on the same URL at the same time as any of your friends (or those people in your WriteOnGlass network/contact), you can use the e-post-it to IM back and forth, live!

It's in BETA mode right now, but I visited the WriteOnGlass offices a few weeks back and convinced them that you _flossers were the perfect audience to help them work out the kinks. I've been using it for over a month now and I really haven't found anything NOT to like.

So if you want to sign up, go to WriteOnGlass.com and enter the custom invite code "flossers." You can even add me as a contact if you'd like just by searching my name. See you on the Internets!

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Wired, YouTube
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technology
Watch This Robot Crack a Safe in 15 Minutes
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Wired, YouTube

When Nathan Seidle was gifted a locked safe with no combination from his wife, he did what any puzzlemaster—or, rather, what any engineer with a specific set of expertise in locks and robotics—would do: He built a robot to crack the safe. Seidle is the founder of SparkFun, an electronics manufacturer based in Denver, and this gift seemed like the perfect opportunity to put his professional knowledge to the test.

The process of building a safecracking robot involved a lot of coding and electronics, but it was the 3D printing, he said, that became the most important piece. Seidle estimated that it would take four months to have the robot test out different combinations, but with one major insight, he was able to shave off the bulk of this time: While taking a closer look at the combination dial indents, he realized that he could figure out the third digit of the combination by locating the skinniest indent. Thanks to this realization, he was soon able to trim down the number of possible combinations from a million to a thousand.

Watch the video from WIRED below to see Seidle's robot in action, which effectively whittled a four-month safecracking project down to an impressive 15-minute job.

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iStock
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Big Questions
How Does Autopilot Work on an Airplane?
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iStock

How does autopilot work on an airplane?

Joe Shelton:

David Micklewhyte’s answer is a good one. There are essentially a few types of features that different autopilots have. Some autopilots only have some of these features, while the more powerful autopilots do it all.

  • Heading Hold: There’s a small indicator that the pilot can set on the desired heading and the airplane will fly that heading. This feature doesn’t take the need for wind correction to desired routing into account; that’s left to the pilot.
  • Heading and Navigation: In addition to holding a heading, this version will take an electronic navigation input (e.g. GPS or VOR) and will follow (fly) that navigation reference. It’s sort of like an automated car in that it follows the navigator’s input and the pilot monitors.
  • Altitude Hold: Again, in addition to the above, a desired altitude can be set and the aircraft will fly at that altitude. Some autopilots have the capability for the pilot to select a desired altitude and a climb or descent rate and the aircraft will automatically climb or descend to that altitude and then hold the altitude.
  • Instrument Approaches: Autopilots with this capability will fly preprogrammed instrument approaches to the point where the pilot either takes control and lands or has the autopilot execute a missed approach.

The autopilot is a powerful computer that takes input from either the pilot or a navigation device and essentially does what it is told to do. GPS navigators, for example, can have a full flight plan entered from departure to destination, and the autopilot will follow the navigator’s guidance.

These are the majority of the controls on the autopilot installed in my airplane:

HDG Knob = Heading knob (Used to set the desired heading)

AP = Autopilot (Pressing this turns the autopilot on)

FD = Flight Director (A form of navigational display that the pilot uses)

HDG = Heading (Tells the autopilot to fly the heading set by the Heading Knob)

NAV = Tells the autopilot to follow the input from the selected navigator

APR = Tells the autopilot to fly the chosen approach

ALT = Tells the autopilot to manage the altitude, controlled by the following:

VS = Vertical Speed (Tells the autopilot to climb or descend at the chosen rate)

Nose UP / Nose DN = Sets the climb/descent rate in feet per minute

FLC = Flight Level Change (An easy manual way to set the autopilot)

ALT Knob = Used to enter the desired altitude

This post originally appeared on Quora. Click here to view.

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