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Apollo and Heracles struggle for the Delphic tripod; side A from an Attic red-figure stamnos, c. 480 BC. Louvre. A sacrificial tripod, whose name comes from the Greek meaning "three-footed", is a three-legged piece of religious furniture used in offerings and other ritual procedures. This ritual role derives from its use as a simple support for ...
I covered the plywood body mould with wet paper and laminated the surface with fiberglass, rubbed down the outside, removed the mould from inside, had it upholstered and added the leg. In the end I installed the red telephone on the inside wall of the chair. The naming part of the chair was easy, the BALL CHAIR was born. —
Schematic 3 way ball valve: L-shaped ball right, T-shaped left. Valves with three ports serve many different functions. A few of the possibilities are listed here. Three-way ball valves come with T- or L-shaped fluid passageways inside the rotor. The T valve might be used to permit connection of one inlet to either or both outlets or connection ...
The Apollo Command Module reentered with the center of mass offset from the center line; this caused the capsule to assume an angled attitude through the air, providing a sideways lift to be used for directional control. Rotational thrusters were used to steer the capsule under either automatic or manual control by changing the lift vector.
Actual Apollo 1 hatch on display at the Kennedy Space Center Apollo Saturn V complex. The Apollo 1 command module has never been on public display. After the accident, the spacecraft was removed and taken to Kennedy Space Center to facilitate the review board's disassembly in order to investigate the cause of the fire.
A gas tap is a specific form of ball valve used in residential, commercial, and laboratory applications for coarse control of the release of fuel gases (such as natural gas, coal gas, and syngas). Like all ball valves its handle will parallel the gas line when open and be perpendicular when closed, making for easy visual identification of its ...
The Apollo 1 spacecraft weighed approximately 45,000 pounds (20,000 kg), while the Block II Apollo 7 weighed 36,400 lb (16,500 kg). (These two Earth orbital craft were lighter than the craft which later went to the Moon, as they carried propellant in only one set of tanks, and did not carry the high-gain S-band antenna.)
Valve seats are often formed by first press-fitting an approximately cylindrical piece of a hardened metal alloy, such as Stellite, into a cast depression in a cylinder head above each eventual valve stem position, [1] and then machining a conical-section surface into the valve seat that will mate with a corresponding conical section of the ...
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