What is it?
- Thread starter scifan57
- Start date
AdmiralAdama
iPad Fan
Wow. I haven't turned out the light yet and the challenge is won.
You're up sir.
AA
You're up sir.
AA
Richard Brown
iPF Novice
It looks like an early mobile phone nicknamed the brick, although the ones I have seen were dark grey or black.
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Richard Brown
iPF Novice
A bit of Googling has given me Motorola as the manufacturer this phone was produced in 1989 and cost £1765!
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Richard Brown
iPF Novice
Cheers Scifan. Here's mine.
What is this object called?
What is it used for?
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What is this object called?
What is it used for?
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OP
OP
It's called a Sector and was used for calculation until it was made obsolete by the introduction of the slide rule.
http://www.mathsinstruments.me.uk/page37.html
http://www.mathsinstruments.me.uk/page37.html
Richard Brown
iPF Novice
scifan57 said:
Spot on Scifan. Were sectors ever used in the Navy?
That's an interesting website. I rely on a book of drawing and surveying books in my library. The actual objects can be costly to collect.
Your turn.
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OP
OP
I have no idea if sectors were ever used in the navy.I expect they were,however,as naval gunnery requires calculations that are quite complicated.
Here's another site that may be of interest.
http://sliderulemuseum.com/Rarities.htm
Here's another site that may be of interest.
http://sliderulemuseum.com/Rarities.htm
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AdmiralAdama
iPad Fan
Looks like you're showing us the right hand 1/3rd (look down view) of the American designed and manufactured "Norden bombsight."
A copyrighted on-line schematic diagram describes the device as a "tachometric bombsight used by the United States Army Air Forces (USAAF) and the United States Navy during World War II, and the United States Air Force in the Korean and the Vietnam Wars to aid the crew of bomber aircraft in dropping bombs accurately."
A Wiki entry refers to the Norden as "a mechanical computer that calculated a bomb's trajectory based on current flight conditions, and a linkage to the bomber's autopilot that let it react quickly and accurately to changes in the wind or other effects. Together, they allowed for unprecedented accuracy in day bombing from high altitudes."
Work on the bombsight began in the 1920s by Dutch engineer Carl Norden. The one you have, apparently well preserved in your collection room, is one of the "M" series sights. It looks similar to a copyright image of a Norden sight mounted in a U.S. Air Force B-17 bomber. There is a reference to the Norden bombsight in an article on the atomic bombing of Hiroshima, using the "Enola Gay" B-17 bomber near the end of the Second World War."
AA
A copyrighted on-line schematic diagram describes the device as a "tachometric bombsight used by the United States Army Air Forces (USAAF) and the United States Navy during World War II, and the United States Air Force in the Korean and the Vietnam Wars to aid the crew of bomber aircraft in dropping bombs accurately."
A Wiki entry refers to the Norden as "a mechanical computer that calculated a bomb's trajectory based on current flight conditions, and a linkage to the bomber's autopilot that let it react quickly and accurately to changes in the wind or other effects. Together, they allowed for unprecedented accuracy in day bombing from high altitudes."
Work on the bombsight began in the 1920s by Dutch engineer Carl Norden. The one you have, apparently well preserved in your collection room, is one of the "M" series sights. It looks similar to a copyright image of a Norden sight mounted in a U.S. Air Force B-17 bomber. There is a reference to the Norden bombsight in an article on the atomic bombing of Hiroshima, using the "Enola Gay" B-17 bomber near the end of the Second World War."
AA
