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A controlled burn at the former Seventh Day Adventist Book Center in Sun Prairie, WI on September 29, 2008.
In the control room
From the Behind-the-Scenes Tour around Tower Bridge: Towers, high-level Walkways and Victorian Engine Rooms down to its hidden depths, normally out of bounds to the public...views from the Glass Floor and high-level Walkway, then the original steam engines, accumulators and boilers in the Victorian Engine Rooms...the Bridge’s operational areas including the Control Cabin, Machinery Room and the immense Bascule Chambers, which house the 422-ton counterweights.
Built between 1886 and 1894, the Bridge has spent more than a century as London's defining landmark, an icon of London and the United Kingdom.
A huge challenge faced the City of London Corporation - how to build a bridge downstream from London Bridge without disrupting river traffic activities. To generate ideas, the Special Bridge or Subway Committee was formed in 1876, and a public competition was launched to find a design for the new crossing.
Over 50 designs were submitted to the Committee for consideration, some of which are on display at Tower Bridge. It wasn't until October 1884 however, that Sir Horace Jones, the City Architect, in collaboration with John Wolfe Barry, offered the chosen design for Tower Bridge as a solution.
It took eight years, five major contractors and the relentless labour of 432 construction workers each day to build Tower Bridge under the watchful eye of Sir John Wolfe Barry.
Two massive piers were built on foundations sunk into the riverbed to support the construction, and over 11,000 tons of steel provided the framework for the Towers and Walkways. This framework was clad in Cornish Granite and Portland Stone to protect the underlying steelwork and to give the Bridge a more pleasing appearance.
When it was built, Tower Bridge was the largest and most sophisticated bascule bridge ever completed ('bascule' comes from the French word for 'seesaw'). These bascules were operated by hydraulics, using steam to power the enormous pumping engines. The energy created was stored in six massive accumulators, meaning that as soon as power was required to lift the Bridge, it was always readily available. The accumulators fed the driving engines, which drove the bascules up and down. Despite the complexity of the system, the bascules only took about a minute to raise to their maximum angle of 86 degrees. Find out more about this process.
Today, the bascules are still operated by hydraulic power, but since 1976 they have been driven by oil and electricity rather than steam. The original pumping engines, accumulators and boilers are now on display within Tower Bridge’s Engine Rooms.
[TowerBridge.org.uk]
The karaoke bar owner showed us the four buttons (plus number pad) we would need to operate the machine but failed to mention the purpose of the other thirty. One must assume the unpressed buttons hold the keys to time travel and untold destruction.
An NOS cruise control I bought years ago. The installation instructions are for a Chevelle but it should be able to be adapted to my 1974 Spirit of America Nova.
An NOS cruise control I bought years ago. The installation instructions are for a Chevelle but it should be able to be adapted to my 1974 Spirit of America Nova.
Radio Control Soaring National Championships, held July 21-28, 2018, at the International Aeromodeling Center in Muncie, Indiana.
Unlimited Thermal Soaring, July 25, 2018.
Photos by Jenni Alderman.
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Here we have used particle effects to simulate how our fuel and lubrication probes relay data 1 way to the controller mounted on the nearby workbench.
Diefenbunker: Canada's Cold War Museum
MESSAGE CONTROL CENTRE
Coded messages would have flooded into the Bunker during a nuclear attack. Throughout CFS Corp's operational years during the Cold War, the Message Control Centre (MCC) had to sort them quickly and accurately.
Staff at the MCC logged, processed, duplicated, and distributed all incoming and messages. They also had to ensure outgoing messages were authenticated and formatted before transmission. Even small errors could be catastrophic in a crisis.
Five staff members per shift handled outside messages, as well as the internal message system within the Bunker.
Notice the pass-through slot in the wall-cryptographers in the next room were ready to decode incoming messages and encode those being sent out.
These controls are what is used on a fishing trawlers to cast and haul in the large nets that catch the yummy fish we love to eat.
Get onto this artist asap, as there are very few who are writing music this honest and yet this good.
Slightly different controls than a Cessna or Piper. The Diamond DA40 actually utilizes, as you can see, a center stick instead of a yoke. To me, the stick seems more responsive, plus the PTT button for the radios is like a trigger button on the back of the stick :-) Also, the seat does not move forward or backward. It is in a fixed position and the rudder pedals can be moved forward or backward instead.
Tuesday, July 26.
Radio Control Soaring, held July 23-30, at the International Aeromodeling Center in Muncie, Indiana.
Photos by Jenni Alderman
These metal plates that look like bars of silver are actually corrosion-control anodes. Apparently, they get welded onto underwater metal foundations to prevent decay. They work by attracting rust and corrosion away from the actual foundation or submerged vessel. There was a team of underwater divers at the museum the other day welding these suckers on.