thornhappy -> RE: WASHINGTON TIMES QUESTIONS WTC 7 COLLAPSE (3/7/2010 12:30:58 PM)
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ORIGINAL: Rule quote:
ORIGINAL: thornhappy Better yet, add a transmitter so you could check for life of the unit. Why? There may have been up to 240 x 100 = 24000 detonators emplaced. Who cares, considering such redundancy, if some of them do not function? Rule, imagine trying to buy, and emplace, and plug into a power source, 24,000 units. It boggles the freaking mind. quote:
thornhappy Oops...now you need a bigger battery. quote:
Rule No, you do not. Because one does not check for the life of the unit. What batteries? Do you have any proof that batteries were used? The detonators may have been powered by the building's electricity supply. When would they have done all the wiring of those units? It would be obvious as hell that folks were screwing around in the overhead on every floor. Just think how folks remember network techs running new Ethernet cables in an office - ladders hanging around, dust from the tiles, it's obvious to a whole lot of folks that some work's being done. Battery powered units would be less hassle than wiring them in. quote:
thornhappy Oops, now you need a bigger transmitter to make it through the walls quote:
ORIGINAL: Rule What walls? The walls of the friggen building, Rule, if you're using an external transmitter. Or are you now calling for, say, a sophisticated, medium power transmitter on each floor...each of which would have to respond to a master transmitter...leading to some of the same sensitivity issues. The FDNY ended up in a lot of trouble because one of their signal boosters wasn't enabled and they missed a lot of calls, leading to confusion between the incident commander and the crews that were well up in the structures. quote:
ORIGINAL: thornhappy and now you have a hazard to the detonator itself. quote:
ORIGINAL: Rule Why? Detonators can be fired by accident due to the presence of RF fields, which is why when you go on a job site where explosives are used, there's a big sign saying "Turn off all wireless devices." And they have no sense of humor. quote:
ORIGINAL: thornhappy 4) You'd need an antenna with pretty damn good gain quote:
ORIGINAL: Rule Why? Again, if you're using an external transmitter, the signal will be attenuated through the walls, requiring antennas with better gain, or more tx power, or better rx sensitivity. Pick your poison. quote:
ORIGINAL: thornhappy 5) If your receivers only wake up sporadically to check for messages, you'd never get the precision required for demolition. quote:
ORIGINAL: Rule Why would anyone want to wake them up sporadically? If they are battery powered - if you leave them on all the time they'll suck the battery dry. Imagine tapping into the building power for all those receivers. It would be easier to set up by using battery powered units. quote:
ORIGINAL: thornhappy 6) You wouldn't want any big transmitters nearby for safety reasons (which would be a problem since WTC 1 had kilowatts of power on the roof due to all the broadcasting gear.) quote:
ORIGINAL: Rule Why would one not want any big transmitters nearby? If each detonator is triggered by a specific frequency code, there is no likelihood within the two weeks that the detonators are emplaced that any will be erroneously triggered by nearby transmitters that each function at their own specific, easily avoided, frequencies and that cannot possibly accidentally transmit the code. As I explained above, detonators can be set off by stray RF. You may not want to hear gory details, but the gory details are what makes this idea pretty damn preposterous. And I swear I'll never edit a post like that again. Honest.
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