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The plane either climbs or dives, depending on the direction of the pitch. But by mounting an object to the center of the system, you can make sure the object can face any particular direction at any time. Each ring can pivot around one axis. Today, you can visit that same tunnel and even see a message scrawled by a slave on the wall inside the secret room. What you won't see is the hidden passageway between the main house and the guest house. This is what you see on the right in the illustration. The home was built by trader Isaac Brown in 1856 at the site of an established settlement and trading post. As an early settler to the region, Brown was fearful he might be attacked by the Native Americans in the area, so he built the 12-room Octagon House as somewhat of a fort, complete with an "Indian Lookout" room, where Brown could keep watch.

Brown gave the home to his son, Edwin, as a wedding gift upon Edwin's engagement to his fiancé, Ruth Pier. Nothing earns a home the reputation of eccentricity quite like rumors that it's haunted. But nothing could be further from the truth. Wadler, Joyce. "At Home With Moby in a Hollywood Hills Castle." The New York Times. Brenoff, Ann. "Hot Property: The Wolf's Lair Castle is listed for $7.5 million." Los Angeles Times. Homes with hidden passageways have a way of taking on new roles as times change, which was the case for the Octagon House in Fond du Lac, Wis. If Native Americans attacked, the family would need a place to hide, so Brown's design included nine secret passageways and a hidden room adjacent to the Indian Lookout room. The house was constructed by Captain Jonathan Hunt in 1710. To provide protection from the local Native Americans, Captain Hunt installed a secret passageway in the home as a family hiding spot.

Richard Garriott is building a new home in Austin, so he may outdo Britannia Manor. Their ghosts may haunt the home. Known as "The Strangest House in the World," Körner's Folly in Kernersville, N.C., takes eccentric home designs to a new level -- that is, lots of new levels. But a pool table mounted on a gimbal system could adjust for changes in the ship's orientation, maintaining a level playing surface. McKinnon, Mika. "NASA Tossed Astronauts with this Gimbal Rig Before Launching Them into Space." Gizmodo. Not only does NASA use gimbals when designing navigational systems and instrument panels, but also for building training simulators and other terrestrial components. Hoag, David. "Apollo Guidance and Navigation Considerations of Apollo IMU Gimbal Lock." NASA. One problem with gimbal systems is the gimbal lock. Handheld gimbals, motorized gimbals, and gimbal heads are common in the industry, helping reduce camera shake and achieving smooth gimbal shots. Perhaps not quite as practical are the fascinating nooks, crannies and cubbyholes, some of which are covered by curtains. The 15 fireplaces are each completely different, as are all the doors.

The hotel was advertised as comfy accommodations for young women visiting the 1893 World's Fair in Chicago, but in fact it included hidden staircases and trap doors that allowed Holmes to sneak into those women's rooms. An upstairs chute allowed him to toss victims' bodies into the basement, where he'd set up a dissection room and crematorium. An IMU measures changes in pitch, roll and yaw as well as acceleration. The IMU contains accelerometers and gyroscopes to monitor changes in spacecraft velocity and attitude. Guests sat on a bench along the wall, and the table would roll toward them and lock into place. A rotation along this line would result in a roll - the plane would start doing barrel rolls. This article was updated in conjunction with AI technology, then fact-checked and edited by a HowStuffWorks editor. During a recent auction weekend, HowStuffWorks was given a behind-the-scenes tour of Red Baron's Antiques auction house. Compensation for some officials is generous when compared with the average American's salary - $51,480 according to the Bureau of Labor Statistics for the second quarter of 2022, the most recent data available.

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