DUST AND FOG SYSTEMS
There are various ready made dust applicator available from the special effects
rental houses. Most work quite well. The Penberthy steam ejector works very
well in the 1" x 1" x 1/2" size. It will work well with various pressures and
needs a large supply pipe. 1" works well. (Available from Mc Masters-Carr)
Gloves should be used as the CO2 tanks, valves etc. get cold. Ski
goggles and dust masks are necessary. When dealing with high pressure hoses
you must relieve the hose pressure before making any changes. The quick couplings
will not disconnect under pressure and are dangerous if released without releasing
The wind often shifts direction constantly and having the ability to move the
compressors or tanks is useful. Long hoses are quite helpful. Having extension
hoses with quick couplings of the right type also helps. There are many different
types of couplers. Make sure that all couplers are compatible. If you have different
types label them and make adapters is necessary. When using equipment that you
have not yet seen, bring extra couplers, reducers, nipples, wrenches, teflon
tape and hose.
For fog and dust
For communications, stereo head phones, the big muff kind, wired mono, with
a radio or monitor are absolutely necessary. The high noise and distance make
any other means of communication impossible. When giving instructions think
about where the person is and how he sees things. His left, toward camera, toward
the trees, east (if he knows directions).
Getting the feel of how to lay down the dust or smoke takes time and knowing
when to call "action". While getting the feel of the situation it's better to
modify procedures if they seems to be working rather that starting all over.
Finding the parameters is most important. A tell-tale strip of rag on a C stand
is helpful to judge the wind, both for direction and velocity. The wind can
be entirely different at camera and out there.
When dealing with moving vehicles in dust or smoke there is danger to everyone.
The frustration of dealing with shifting wind cannot interfere with safety procedures.
© Copyright 1999-2004 Ron Dexter. All Rights Reserved.