Jim,<br>
Well I was thinking of low-budget, Hong Kong in the 70's type special
effects, and just meant that things don't really fly around as much as
we see in the movies. That said, I'm a huge fan of stuff flying around,
so thanks :-)<br>
Peter<br><br><div><span class="gmail_quote">On 6/24/08, <b class="gmail_sendername">Jim Lux</b> <<a href="mailto:James.P.Lux@jpl.nasa.gov">James.P.Lux@jpl.nasa.gov</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
At 09:25 AM 6/24/2008, Jim Lux wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
At 02:31 PM 6/20/2008, Peter St. John wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
The destructive radius of Little Boy was about total, up to about one
mile radius, and tapered down to light at about two miles. So being in
a lead-lined steel container at 2000 meters might be OK for Indiana.<br>
<br>
In all action movies, blasts throw people unhurt for long distances;
when that much force (to impart that much momentum) would kill you.
That part is just conventional Hollywood. I could teach RGB to kick me
so that I fly through the air as in a Bruce Lee movie; it's a stunt,
and real kicks reallly hitting drop you like a sack of potatoes, I've
seen it. But not in movies. Similarly bullets, they drill holes in you,
if they pushed you through the air the recoil would do the same to the
shooter.<br>
<br>
As for the scene's good taste I can't say, I haven't seen the movie yet :-)<br>
<br>
Peter<br>
</blockquote>
<br>
As someone who used to work in the business of doing this sort of thing
(e.g. physical effects) for movies, TV shows, and commercials, you can
assume that whatever you see on screen is specifically designed to
"look like" what the director thinks will create the correct impression
in the viewer. (e.g. real rain is invisible on film, for all intents
and purposes..)<br>
<br>
For blasts (or kicks, etc.) flinging folks about, they use what is
known as a "jerk vest" (for the high third derivative of position, not
to describe the wearer) and bungee cords, springs, hydraulic winches,
etc. Note well that the effects tech just runs the gear. A
stunt person (aka human sandbag) survives the loads (and gives thanks
to Stapp).<br>
<br>
To fling things about, we used a variety of things.. air power is
popular, so is gunpowder. (look under a car that flips over for the
piece of telephone pole used as the piston in a one-shot internal
combustion engine.) Speaking of refrigerators, air pressure is
just fine for a hundred meter or so launch.<br>
</blockquote>
<br>
For some examples:<br>
jerk vest test<br>
<a href="http://www.reelefx.com/index.php?c=effect.view&id=260" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.reelefx.com/index.php?c=effect.view&id=260</a><br>
<br>
refrigerator launch<br>
<a href="http://www.reelefx.com/index.php?c=effect.view&id=124" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.reelefx.com/index.php?c=effect.view&id=124</a><br>
<br>
<a href="http://www.reelefx.com/" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.reelefx.com/</a> gives a lot of examples<br>
<br>
<br>
<a href="http://www.reelefx.com/index.php?c=effect.list&id=15" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.reelefx.com/index.php?c=effect.list&id=15</a><br>
<br>
has variety of specific effect tests. Search for 'air mortar' for launches<br>
<br>
<br>
Naturally, I'm particularly proud of the tornado and multicam, since I helped make them...<br>
<br>
<a href="http://www.reelefx.com/index.php?c=effect.list&id=13" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.reelefx.com/index.php?c=effect.list&id=13</a> tornados<br>
<a href="http://www.reelefx.com/index.php?c=effect.view&id=153" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.reelefx.com/index.php?c=effect.view&id=153</a> from Swordfish<br>
<a href="http://www.reelefx.com/index.php?c=effect.view&id=169" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://www.reelefx.com/index.php?c=effect.view&id=169</a>
(stuff done more recently, now with digital cameras, which makes life
MUCH easier..) Eadweard Muybridge would be proud of us.<br>
<br>
<br>
</blockquote></div><br>