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Each business page of a wall-mounted monthly calendar has glued to it, near the spine of the calendar, a thread of detonation cord. A small battery powered timer triggers the respective thread of det cord at the end of each month. The obsolete page gracefully falls to the ground.
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Annotation:
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Plus people who wind up with stacks of calendars that didn't sell could have fun with them (+) |
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// The obsolete page gracefully falls to the ground. // |
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… and is lost in the rubble of the wall it was attached to. |
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Either this is irony, or you have no actual practical experience
with det cord, [porp]. To begin with, initiating it requires a
primary explosive. A No. 8 electric det, if held in the hand, will
result in instantaneous amputation of same at the wrist. |
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If you deploy detonators and det cord indoors, very quickly
indoors becomes outdoors. |
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Hey I'm relying on you for explosive expertise. Maybe it's a really thin custom det cord and the wall might last till December. |
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You could use that surgical det-cord (it has another
name so as not to alarm patients, but I don't
remember it) which is used in certain situations to
cut bones quickly. I believe it's electrically initiated. |
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If there's even a remote possibility that this is a thing, I will be pretty surprised. I think you'd do less damage with an axe than you would det cord for amputation. |
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//If you deploy detonators and det cord indoors, very quickly indoors becomes outdoors// |
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Well surely it can be scaled down, [8th]? I know you'd run into problems of scale, and from what I remember you run into problems of sustaining a detonation over too small a cross section, but surely there are materials available which are more suited to narrower det cord, than say what is used at present? |
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Monocrystalline HMX has the superior propagation
characteristics you want, but it's not suitable for a flexible item
like det cord. Having said that, the calendar spine could be an
array of rigid rods. |
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However, cross-coupling of the shock wave could cause all the
rods to initiate almost simultaneously. |
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There are low-yield pyrotechnic compositions that might be the
solution, and they only require ignition, not a detonator. |
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Not really. It's hygroscopic, and it produces a lot of hot
particulates. |
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An extruded nitrocellulose derivative blended with an inert
combustion modifier like glass fibre might be suitable. |
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do you mean that synonymously with "monocrystalline" ? |
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Anyways, a "bang" is probably not feasible, but a very thin visco fuse should do it, for the cartoon, sparking fuse effect. |
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A tube of flash paper might be enough, if the risk of cross-linking
to the other array elements can be controlled. |
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for that you might as well use black powder and put some scotch tape over it. avoiding xlinking's easy: a strip of al foil on the back covering the perforation line, glued below it but not above. |
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Could you make the whole page out of flash paper
and avoid the mess on the floor? To avoid cross-
linking include some nitinol foil between pages.
Maybe the heat from the burning flash paper could
activate the nitinol so it rolls itself up into a little
tube by the spine of the calendar. |
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