I couldn't find any info on these:
Görz listening device
Hartree two-station altitude meter
Görz listening device
Hartree two-station altitude meter
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He's giving a brief response because you didn't actually say what you wanted at all. Since all you said is that "you did this," he's giving a precisely accurate acknowledgement to that. ^_^
I would speculate, completely off the top of my head, that you *meant* to ask us what the other forum-goers here knew about these devices, if anything. Unfortunately, for my part, I can't do much better. All I found was a mention here, which I suspect, given your list of mods in your signature, is the source you used to obtain the names if you're researching online for your latest work. What I would purely guess completely at random, given the context, is that these are intended to spot the enemy before they spot you, given their categorization as sighting equipment. Now, this is not my area of expertise, but sound ranging was used back in World War 1 to identify range to the impact site of a shell (long story short, microphones were set up at some distance from each other and the time of detection used with the speed of sound to triangulate the source), which could then be used to adjust one's aim, but I was not aware it was used in World War 2. I apparently given to understand that some also used sound detection to identify incoming both aircraft and artillery in World War 1 as well, and a few larger stations were set up along these lines in the UK during the interwar years before radar and Chain Home superseded them. A two-station altimeter, on the other hand, would seem redundant if targeting ground positions if you have good maps (which I would expect for an army geared to fight a defensive war as Norway was), but key in targeting aircraft. Soo...that probably doesn't help: to sum up, they were used to detect something, which might have been artillery, might have been aircraft, and might have been something else. I'd imagine you probably figured out that much on your own.
I would speculate, completely off the top of my head, that you *meant* to ask us what the other forum-goers here knew about these devices, if anything. Unfortunately, for my part, I can't do much better. All I found was a mention here, which I suspect, given your list of mods in your signature, is the source you used to obtain the names if you're researching online for your latest work. What I would purely guess completely at random, given the context, is that these are intended to spot the enemy before they spot you, given their categorization as sighting equipment. Now, this is not my area of expertise, but sound ranging was used back in World War 1 to identify range to the impact site of a shell (long story short, microphones were set up at some distance from each other and the time of detection used with the speed of sound to triangulate the source), which could then be used to adjust one's aim, but I was not aware it was used in World War 2. I apparently given to understand that some also used sound detection to identify incoming both aircraft and artillery in World War 1 as well, and a few larger stations were set up along these lines in the UK during the interwar years before radar and Chain Home superseded them. A two-station altimeter, on the other hand, would seem redundant if targeting ground positions if you have good maps (which I would expect for an army geared to fight a defensive war as Norway was), but key in targeting aircraft. Soo...that probably doesn't help: to sum up, they were used to detect something, which might have been artillery, might have been aircraft, and might have been something else. I'd imagine you probably figured out that much on your own.
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Another outdated piece of equipment still used in Norway. I suppose the altimeter could still be useful with all the wilderness. Planes weren't something we had plenty of either.
I thought my thread was obvious enough, and yes, that is where I found that info.
Thanks for the reply. Learned something new.
I thought my thread was obvious enough, and yes, that is where I found that info.
Thanks for the reply. Learned something new.
Is your Google broken?
Of numerous items found
http://rsnr.royalsocietypublishing.org/content/65/4/393
William Hartree suggested replacing the panels by a pair of cables mounted on poles at right angles to one another, the lower cable just above man height and the upper several feet higher. The observer would slide a simple sight along the lower cable until the target was in line with the sight and the upper cable. Height was calculated from the distances between the two stations and the measured angles. Hill purloined a few old gas pipes, added some wire and tape, and they assembled a prototype. It worked nicely. Their second instrument was made honestly at a cost of £2 6s. In May 1916, 20 Hartree instruments were sent to the army in France, where they gave good service.29
http://www.extra.research.philips.com/hera/people/aarts/RMA_papers/aar09pu3.pdf
figure 3
total time used, less than a minute.
Of numerous items found
http://rsnr.royalsocietypublishing.org/content/65/4/393
William Hartree suggested replacing the panels by a pair of cables mounted on poles at right angles to one another, the lower cable just above man height and the upper several feet higher. The observer would slide a simple sight along the lower cable until the target was in line with the sight and the upper cable. Height was calculated from the distances between the two stations and the measured angles. Hill purloined a few old gas pipes, added some wire and tape, and they assembled a prototype. It worked nicely. Their second instrument was made honestly at a cost of £2 6s. In May 1916, 20 Hartree instruments were sent to the army in France, where they gave good service.29
http://www.extra.research.philips.com/hera/people/aarts/RMA_papers/aar09pu3.pdf
figure 3
total time used, less than a minute.
Heh... I have to remember that phrase. "My google was broken - i couldn't solve the problem"