The Autofrisk: All the Groping Action, Just 40 Pence

Cheeky engineer Tim Hunkin (of Secret Life of Machines fame) invented the Autofrisk, a device that gently gropes the user in exchange for a few coins. (In the U.K. apparently one cannot get this experience for free at local airports.) The Autofrisk is one of many coin-operated machines Hunkin built for an ongoing show under the Southwold Pier in Suffolk, which looks to me to be a kind of geek Mecca.

Hunkin and compatriots made a ten-minute film about the process of making the Autofrisk and similar machines. It's called Trial & Error, and it's about how Hunkin designs his machines as he goes along, adapting as he discovers limitations in the materials rather than designing everything in the abstract beforehand. For example, the Autofrisk was originally designed to have nine inflated hands groping at once (!); that had to be reduced to three after he tested the amount of air necessary to inflate all those gropers.

Hunkin says the machine has "never taken as much money as some of the others, as you have to be quite bold to try it with other people watching you." At 40p (about $0.62), it seems a bargain to me -- probably the most robotic groping a person can get for the money. You can read more about the Autofrisk or watch this lovely little documentary about it:

If you don't have ten minutes, here's a short video of a lady experiencing the Autofrisk for the first time:

Hunkin also sells a DVD containing tons (sorry, tonnes) of videos of his wonderful machines.

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Wired, YouTube
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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Big Questions
How Does Autopilot Work on an Airplane?
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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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