File:Hazardous Homemade Pyrotechnic Flash Pot.jpg
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DescriptionHazardous Homemade Pyrotechnic Flash Pot.jpg |
English: This is an example of a simple homemade pyrotechnic flashpot constructed by amateurs who know just enough about electrical wiring to get themselves into a very hazardous situation.
Modified fuses are used as ignitors, with flash powder poured inside the fuse around the fusible link. Direct-shorting the fuse causes the link to melt instantly and ignite the powder. One of the biggest problems with this device is that it does not include any pilot lights, and so in a dark room it may be difficult to know if a socket is powered or not. Screwing a fuse loaded with flash powder into a live socket will cause it to blow up in the face of the stage hand, severely burning and potentially blinding them. Even screwing an "unloaded" fuse without powder into a live socket can suddenly eject a vaporized cloud of metal slag from the fusible link up into the face of the stage hand. Further, since this is assembled by amateurs, grounding may not be observed, hot/neutral polarity may be reversed, and since this circuit has no electrical isolation transformer, the socket shell can pose an electrocution hazard to anyone handling the fixture or the fuses. Attempting to use fuses 10 amps or larger as an ignitor can cause much larger 100 amp to 600 amp fuses and breakers to trip, causing widespread building disruption. This occurs because protection is designed to trip instantly if a sufficient amount of current passes in a very short period. Several hundred amps can potentially pass through a small direct-shorted fuse for a few milliseconds before it melts or vaporizes. This is an all-around disaster waiting to happen, and if a fire marshall were to see this in use, the stage/venue could very well be closed for unsafe operating conditions. |
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Date | |||
Source | Own work | ||
Author | DMahalko | ||
Permission (Reusing this file) |
I, the copyright holder of this work, hereby publish it under the following licenses: This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license.
You may select the license of your choice. |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:56, 19 December 2011 | 3,648 × 2,736 (6.52 MB) | Rotatebot (talk | contribs) | Bot: Reset EXIF-specified Orientation of image (EXIF-Orientation set from 6 to 1, rotated 0°) | |
19:06, 1 December 2008 | 2,736 × 3,648 (6.52 MB) | DMahalko (talk | contribs) | {{Information |Description=This is an example of a simple homemade pyrotechnic flashpot constructed by amateurs who know just enough about electrical wiring to get themselves into a very hazardous situaiton. Modified fuses are used as ignitors, with flas |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A640 |
Exposure time | 1/60 sec (0.016666666666667) |
F-number | f/2.8 |
Date and time of data generation | 13:33, 1 December 2008 |
Lens focal length | 7.3 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 13:33, 1 December 2008 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 13:33, 1 December 2008 |
Meaning of each component |
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Image compression mode | 5 |
APEX shutter speed | 5.90625 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, auto mode |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 12,710.801393728 |
Focal plane Y resolution | 12,725.581395349 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |