To: "'paul kemble'"
For further infromation on the substance...
"I finally got the jpeg JW was talking about. It's a scan of an article
from "International Defense Review", April, 1993.
I have to say, this material is less than impressive. In testing they
set a performance target for it to "contain and withstand 100 mW/cm^2
for one 15 ns (nanosecond) pulse". That comes to 1.5 nJ (nanoJoules)
per square centemeter, or 1.5 Watt-seconds per 100 m x 100 m square!
You wouldn't even feel this if it were to hit bare skin! I'll give
them the benefit of the doubt, though, and assume they meant
100 MW/cm^2 (megaWatts, not milliWatts). This still only comes to
1.5 J/cm^2. I've got a pair of lasers that fire 150 mJ pulses 10 ns
long in beams about 3 mm in diameter. That translates to 212 MW/cm^2,
and that still won't go through a sheet of paper! (I've never stuck
my hand in the beam, so I can't tell you if it hurts.)
They later said "a sheet of only 3 mm thickness sustained simulated
nuclear flashes equivalent to 29,800 kcal/m^2 over 2.5 minutes while
the substrate suffered temperatures of no more than 100 C". This
translates to 83 Watts per sqare centimeter. I admit that's a pretty
high power density (assuming a continuous beam), but it could easily
be withstood by a piece of sheet steel with a little water cooling
(which might explain their 100 C figure). But since they say simulated
nuclear FLASHES, they probably hit the target with a bunch of pulses,
so the total average power density was probably a hell of a lot lower.
I have to admit, Starlight is a hell of a lot less impressive than
I've been lead to believe. Articles like this one probably sound
pretty impressive to people who don't know what they're reading,
though. If the blowtorch and egg trick that was shown on BBCs
"Tomorrows World" years ago could be duplicated, I would be far more
impressed.
Interesting mode of operation, though. Ablation and formation of an
ionized layer that will reflect incident radiation. Does anybody know
of any applications where this type of thermal barrier coating might
be currently used?"
(Posted by [Ooops] Walter, Deja).
This American expert posted a number of very silly attempts at revealing my location
(presumably through examining the codings in my postings)
when all he had to do was either ask me directly, or even to look
at the rest of my web-site!
Perhaps we can all e-mail
Tomorrows World to ask them what theatre tricks they
use?
06 Feb 2003 21:36
Message:
Your laser appears to be from the kinder garden,probably more akin to the title
of the song Puppy Love.
Your interrpritation of energy dealt with do you really believe that the MOD/
RSRE have a laser that can only barely lick a postage stamp:|? Like to get your
mind around just three results.
1. 100MW base line[ and you have nothing which can tollerate that type of
energy]increased to 6600MW plasma produced, increased to 8000MW[ plasma
reduced],described as self imunising, or self healing, increased to 25,000MW:
CMsq/per second.surface under special microscope showed only minute pinprick.
2. 3.6GW CMSq/per second.had to turn laser off after about 2 minutes, it[the
laser] could not take the heat.
3 CO2 laser continuos at 3750w CMSq/per second. The test requirement was to
withstand 200 WCMSq/ per second for 2 seconds duration[use your imagination what
that would be used for] however after SIX Minutes duration 1mm thick of Starlite
was still giving protection to the substrate!
In the USA. they recognise a "Q" value for the capability of thermal protection.
The tiles on the Shuttle have a "Q" value of ONE.At75mm thick.
Starlite has a "Q" value of TWO THOUSAND FOUR HUNDRED AND SEVENTY!.at 1mm thick.
Washington DC USA 1994 MW received an award for the Best Technology last 10
years
Publicity was not helping us in our cause.So I cooled it. I have just started
reading these pages and felt that I may as well send you this note.
There is however much, much more.
regards,
mw
'
Ps I forgot to mention your explanation of the AWE tests 29800Kcal/CMsq not Msq
makes a big difference if you calculate Msq it works out at 1247MW/Msq.{ENRON
POWER STATION at Wilton, the largest in Europe, USING; PLEASE CHECK I BELIEVE 12
MILLION CUBIC FEET OF GAS } PRODUCES 1700MW per hour.
Based on results that one continous fluence of 400Cals/CMsq [1.5 seconds
duration]can put a hole straight through a 1 inch thick steel plate,[ which it
definitely can] That energy of continous fluence dealt with in 2mins29secs
calculated as above would melt 100 inches thick steel! 1Mtr.sq.
Starlite was 3mm thick giving protection to a kevlar substrate; which in fact
did not raise in back face temperature to more than 70.c.
regards,
mw
Thank you mw, know the feeling. Well, Walter?
