Comments by "SeanBZA" (@SeanBZA) on "The History Guy: History Deserves to Be Remembered"
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Banks used to store all returned cheques, along with copies of statements, as microfilm images, processed by some central facilities as they were processed. This film was then stored, undeveloped, for the required retention time, then recycled for the silver content. As the banks rarely had to retrieve any information off any roll, they left them in the canisters undeveloped, as the cost of developing them was pretty expensive, and thy relied on the fact that most of the time a query would come in while they still had a paper copy or the original around to use. If there was a need for one of the images they would then develop the film, and hope that the scan had been successful, or at least came out readable.
IIRC less than 1% would ever need the processing and development, saving a lot of money on film processing, plus at the end of the retention process the film was more valuable as scrap silver, as it still had all the original active halide salt in it. Then the film would go and get stripped of emulsion, and the silver recovered from this residue.
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@poppedweasel The British created the word Concentration Camp, Scorched Earth and considered every person to be a military member, and shot first. They were after the gold and the diamonds, nothing else.
They also had incredibly stupid leadership, who would only use the manuals that they had been taught for generations worked, from a century or more before, and were absolutely unable to consider any change in tactics as an option.
Nothing much changed between the Great War and the 2 World Wars until the leadership was totally replaced by new thinkers who, like the Canadians, had the luxury of difference, and the ability of the leadership at the Regiment not being as inflexible due to them having had to develop so far from the hidebound British structure.
As well, the pronunciation of the names and places hurts, especially as there are enough sources available to get the pronunciation of every name and place correct.
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Actually helicopter blades do not use duck tape, you have a 3M made clear heavy urethane based tape, that is applied to the leading edge of the blades, to keep damage from rain and dust down. Available in a few widths, and sold as plain "Blade tape" to the helicopter users. You apply it to a clean blade, then leave to cure for an hour or three, then fly it. You can be back the next day applying it again, if you fly through a rain storm, which trashes the outer section, so it is normally applied in 1m sections, so that you only have to clean and replace the outside 2m or so of tape, generally around 5 times, before doing all of the tape. Leave it on for a long time, around a year, and it crazes and starts to flake off, and yellows. Takes care to apply correctly, so it does not have edges lift and peel it off.
The cotton duck tape was mostly used for packaging, to seal up hermetic bags that had been opened, before the contents went back to the stores to be properly packed again in sealed plastic pouches, with a dessicant pack inside it to handle moisture, as it could be sitting on the shelf for decades before being used again.
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Funny enough common here in cabinet making, mostly because you can easily fill the hole with filler and hide the screw, but still dig it out later if needed. Only problem is if you have a mix of screws, all the same dimension, but there are a few of the other type mixed in there.
Last time I had that, was late on a weekend, needed to put those last 3 non Phillips screws in, and they were all Robertson. I used a hammer to put them in, like a nail, because they were not critical, and were going into chipboard anyway. Next time I went to the hardware got the set of Roberson drivers, because the remaining screws are all that.
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A well known issue withbatteries, the terminal voltage drops with temperature rise. Thus the simpler charge systems interpret this as being a flat battery, or one with a large load on it, and try to keep terminal voltage constant. This then charges the battery even more leading to heat being generated in the battery, and a loss of electrolyte from both chemical reactions and boiling off. Most modern aircraft will have both thermal control of the charge voltage, and as well a thermal switch on the battery that indicates a hot battery.
Being such an old design this was likely not on the Tupelov, and instead they had the old fashioned starter generator on the engine, where it is quite capable of charging the battery at a very high current if needs be, equal to the starting current draw of the engine. One cell would have shorted out, either from flaked off material bridging out the bottom of the cell, or a separator failing. This then self discharged the cell, and the terminal voltage of this one cell dropped. Then the engine voltage regulator simply tried to keep battery voltage constant, overcharging the other cells, and the battery got hot enough that the cell separators melted, and shorted out the battery totally. Not an easy thing to recover from, as the generator can be disconnected in flight and the battery can temporarily can provide the full load, but the battery will discharge very fast. You cannot really disconnect the battery from the DC bus though, at least not in flight, there are isolating breakers and fuses inside the avionics bays, but you would need to open panels outside to get to them.
They were very lucky though, old design, mostly mechanical linkages and hydraulics, and no electrical systems on the engines needed to run them once started, and the important EGT gauges are self powered by the engine exhaust heat. More modern engine no electrical power no engines, all is controlled by electric motors and valves.
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Only in the USA is the roll sold in 8. Here by me in either 6 or 12, and the mystery meat is sold in a variety of ways. Either as a pack of 7, because 7 comes to a half kilogram, or for others as 12, 10 or 11, because that is a kilogram. Thin, thick or the South African favourite, boerewors, coarse ground meat, fat and spices in a thick casing. To be classed as boerewors you have to meet standards, otherwise it is just sold as sausage. 70% meat, and 20% fat at a minimum, and yes pretty much any animal can be used, though traditionally a lot of the meat is pork.
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