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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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Videos of US Navy vintage analog fire control computers
'nuff said!
(video #7, the others will appear to the right) http://www.youtube.com/watch?v=TkVak...layer_embedded Dave |
#2
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Videos of US Navy vintage analog fire control computers
Cool!
When I saw "analog", I thought electrical analog, i.e., op amps. But this is _mechanical_. Levers & gears & cams! Solving problems with "... up to 26 variables ..."!!! Continuously. Yow! Bob |
#3
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Videos of US Navy vintage analog fire control computers
On May 19, 7:01*pm, Bob Engelhardt wrote:
Cool! When I saw "analog", I thought electrical analog, i.e., op amps. *But this is _mechanical_. *Levers & gears & cams! *Solving problems with "... up to 26 variables ..."!!! *Continuously. *Yow! Bob Thanks for the post; I served my Machinist apprentice at the Frankford Arsenal in Philadelphia, 1955 to 1959. I worked as a machine operator prior to being drafted to the Korean war. (in the army Signal corp., I was train as a field radio repairman, but I digress) I returned and entered the apprenticeship program. As a class project the class ahead of mine built a complete artillery fire control unit with the all of the gears, cams and slides as I see in the video. I am sure that it was still classified so we didn't get to really understand its functions. The Fire control section of the Arsenal was for the most part had limited access. But as machinist, we sometime had to use equipment and did visit some of the areas. |
#4
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Videos of US Navy vintage analog fire control computers
On May 20, 6:29*am, mac wrote:
On May 19, 7:01*pm, Bob Engelhardt wrote: Cool! When I saw "analog", I thought electrical analog, i.e., op amps. *But this is _mechanical_. *Levers & gears & cams! *Solving problems with "... up to 26 variables ..."!!! *Continuously. *Yow! Bob Thanks for the post; I served my Machinist apprentice at the Frankford Arsenal in Philadelphia, 1955 to 1959. I worked as a machine operator prior to being drafted to the Korean war. (in the army Signal corp., I was train as a field radio repairman, but I digress) I returned and entered the apprenticeship program. As a class project the class ahead of mine built a complete artillery fire control unit with the all of the gears, cams and slides as I see in the video. I am sure that it was still classified so we didn't get to really understand its functions. The Fire control section of the Arsenal was for the most part had limited access. But as machinist, we sometime had to use equipment and did visit some of the areas. My Dad was a Navy Fire Control Tech during WWII. He has told me about the mechanical analog computers used to solve the ballistic differential equation. They used spinning platters and rubber wheels for integrators. The early twentieth century was the golden age of mechanical design not sure we have the experience to design something like that now days. Now it can be done with a 25 cent microcontroller. |
#5
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Videos of US Navy vintage analog fire control computers
toolbreaker on Thu, 20 May 2010 08:48:10 -0700
(PDT) typed in rec.crafts.metalworking the following: On May 20, 6:29*am, mac wrote: On May 19, 7:01*pm, Bob Engelhardt wrote: Cool! When I saw "analog", I thought electrical analog, i.e., op amps. *But this is _mechanical_. *Levers & gears & cams! *Solving problems with "... up to 26 variables ..."!!! *Continuously. *Yow! Bob Thanks for the post; I served my Machinist apprentice at the Frankford Arsenal in Philadelphia, 1955 to 1959. I worked as a machine operator prior to being drafted to the Korean war. (in the army Signal corp., I was train as a field radio repairman, but I digress) I returned and entered the apprenticeship program. As a class project the class ahead of mine built a complete artillery fire control unit with the all of the gears, cams and slides as I see in the video. I am sure that it was still classified so we didn't get to really understand its functions. The Fire control section of the Arsenal was for the most part had limited access. But as machinist, we sometime had to use equipment and did visit some of the areas. My Dad was a Navy Fire Control Tech during WWII. He has told me about the mechanical analog computers used to solve the ballistic differential equation. They used spinning platters and rubber wheels for integrators. The early twentieth century was the golden age of mechanical design not sure we have the experience to design something like that now days. Now it can be done with a 25 cent microcontroller. The biggest problem is going to remain "What is it we are trying to calculate?" And "how do we do that?" After that, the rest is just 'engineering' and 'metalworking. Those first two questions are fundamental to any project - be it making a mechanical computer, or designing a software program. "Data + Structures = Program". tschus pyotr -- pyotr filipivich We will drink no whiskey before its nine. It's eight fifty eight. Close enough! |
#6
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Videos of US Navy vintage analog fire control computers
toolbreaker wrote:
On May 20, 6:29 am, wrote: On May 19, 7:01 pm, Bob wrote: Cool! When I saw "analog", I thought electrical analog, i.e., op amps. But this is _mechanical_. Levers& gears& cams! Solving problems with "... up to 26 variables ..."!!! Continuously. Yow! Bob Thanks for the post; I served my Machinist apprentice at the Frankford Arsenal in Philadelphia, 1955 to 1959. I worked as a machine operator prior to being drafted to the Korean war. (in the army Signal corp., I was train as a field radio repairman, but I digress) I returned and entered the apprenticeship program. As a class project the class ahead of mine built a complete artillery fire control unit with the all of the gears, cams and slides as I see in the video. I am sure that it was still classified so we didn't get to really understand its functions. The Fire control section of the Arsenal was for the most part had limited access. But as machinist, we sometime had to use equipment and did visit some of the areas. My Dad was a Navy Fire Control Tech during WWII. He has told me about the mechanical analog computers used to solve the ballistic differential equation. They used spinning platters and rubber wheels for integrators. The early twentieth century was the golden age of mechanical design not sure we have the experience to design something like that now days. Now it can be done with a 25 cent microcontroller. Much of this stuff was still around in the 70's and 80's. I can't speak for the Navy, but the Army's Pershing I and Nike Herc missiles used extensive mechanical computation devices to solve ballistic flight and intercept equations. The centerpiece of the Pershing I guidance computer was a beautifully crafted ball-and disk integrator. |
#7
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Videos of US Navy vintage analog fire control computers
A factor that's been mentioned before, wrt electronic circuits used for
defense or critical missions, is immunity to an EMP event. Mechanisms have high immunity levels, but I suppose that instruments that rely on magnets could be affected. -- WB .......... "Jim Stewart" wrote in message ... Much of this stuff was still around in the 70's and 80's. I can't speak for the Navy, but the Army's Pershing I and Nike Herc missiles used extensive mechanical computation devices to solve ballistic flight and intercept equations. The centerpiece of the Pershing I guidance computer was a beautifully crafted ball-and disk integrator. |
#8
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Videos of US Navy vintage analog fire control computers
Wild_Bill wrote:
A factor that's been mentioned before, wrt electronic circuits used for defense or critical missions, is immunity to an EMP event. Mechanisms have high immunity levels, but I suppose that instruments that rely on magnets could be affected. Not a factor. Mechanical computation devices were used, but there was still plenty of semiconductors in the design. And in 1972 we were doing a major change program to EMP harden the equipment. Mechanical computation equipment was used because it worked, was accurate enough, and fit within the space and power availability for the mission. |
#9
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Videos of US Navy vintage analog fire control computers
pyotr filipivich on Thu, 20 May 2010 13:07:30
-0700 typed in rec.crafts.metalworking the following: toolbreaker on Thu, 20 May 2010 08:48:10 -0700 (PDT) typed in rec.crafts.metalworking the following: On May 20, 6:29*am, mac wrote: On May 19, 7:01*pm, Bob Engelhardt wrote: Cool! When I saw "analog", I thought electrical analog, i.e., op amps. *But this is _mechanical_. *Levers & gears & cams! *Solving problems with "... up to 26 variables ..."!!! *Continuously. *Yow! Bob Thanks for the post; I served my Machinist apprentice at the Frankford Arsenal in Philadelphia, 1955 to 1959. I worked as a machine operator prior to being drafted to the Korean war. (in the army Signal corp., I was train as a field radio repairman, but I digress) I returned and entered the apprenticeship program. As a class project the class ahead of mine built a complete artillery fire control unit with the all of the gears, cams and slides as I see in the video. I am sure that it was still classified so we didn't get to really understand its functions. The Fire control section of the Arsenal was for the most part had limited access. But as machinist, we sometime had to use equipment and did visit some of the areas. My Dad was a Navy Fire Control Tech during WWII. He has told me about the mechanical analog computers used to solve the ballistic differential equation. They used spinning platters and rubber wheels for integrators. The early twentieth century was the golden age of mechanical design not sure we have the experience to design something like that now days. Now it can be done with a 25 cent microcontroller. The biggest problem is going to remain "What is it we are trying to calculate?" And "how do we do that?" After that, the rest is just 'engineering' and 'metalworking. Those first two questions are fundamental to any project - be it making a mechanical computer, or designing a software program. "Data + Structures = Program". Oops, that should read "Data + Algorithms = Programs" -- pyotr filipivich We will drink no whiskey before its nine. It's eight fifty eight. Close enough! |
#10
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Videos of US Navy vintage analog fire control computers
Some of the analog fire control systems used large potentiometers ahead of op-amps wound in trig
fashion to strip off the functions of angles. The pots were housed in large PCB-filled drawers called "coffins". Bob Swinney "pyotr filipivich" wrote in message ... pyotr filipivich on Thu, 20 May 2010 13:07:30 -0700 typed in rec.crafts.metalworking the following: toolbreaker on Thu, 20 May 2010 08:48:10 -0700 (PDT) typed in rec.crafts.metalworking the following: On May 20, 6:29 am, mac wrote: On May 19, 7:01 pm, Bob Engelhardt wrote: Cool! When I saw "analog", I thought electrical analog, i.e., op amps. But this is _mechanical_. Levers & gears & cams! Solving problems with "... up to 26 variables ..."!!! Continuously. Yow! Bob Thanks for the post; I served my Machinist apprentice at the Frankford Arsenal in Philadelphia, 1955 to 1959. I worked as a machine operator prior to being drafted to the Korean war. (in the army Signal corp., I was train as a field radio repairman, but I digress) I returned and entered the apprenticeship program. As a class project the class ahead of mine built a complete artillery fire control unit with the all of the gears, cams and slides as I see in the video. I am sure that it was still classified so we didn't get to really understand its functions. The Fire control section of the Arsenal was for the most part had limited access. But as machinist, we sometime had to use equipment and did visit some of the areas. My Dad was a Navy Fire Control Tech during WWII. He has told me about the mechanical analog computers used to solve the ballistic differential equation. They used spinning platters and rubber wheels for integrators. The early twentieth century was the golden age of mechanical design not sure we have the experience to design something like that now days. Now it can be done with a 25 cent microcontroller. The biggest problem is going to remain "What is it we are trying to calculate?" And "how do we do that?" After that, the rest is just 'engineering' and 'metalworking. Those first two questions are fundamental to any project - be it making a mechanical computer, or designing a software program. "Data + Structures = Program". Oops, that should read "Data + Algorithms = Programs" -- pyotr filipivich We will drink no whiskey before its nine. It's eight fifty eight. Close enough! |
#11
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Videos of US Navy vintage analog fire control computers
Robert Swinney wrote: Some of the analog fire control systems used large potentiometers ahead of op-amps wound in trig fashion to strip off the functions of angles. The pots were housed in large PCB-filled drawers called "coffins". I still have a couple of the vacuum tube opamps they used. -- Anyone wanting to run for any political office in the US should have to have a DD214, and a honorable discharge. |
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