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PREDICT POINT-OF-FAILURE WITHOUT DESTRUCTION<br />
You can use Kaman Variable Impedance DIS·<br />
placement Transducers for test stand measurements<br />
to determine point-of-failure without<br />
running the test unit to destruCtion! For example,<br />
Kaman Non-Contacting Transducers<br />
have been used in high speed jet engines to<br />
measure growth of turbine blades in in erements<br />
as small as .000025N-equlvalent to 1 part<br />
in 1,000 total transducer range-to determine<br />
blade elongation and other distortion as a tunc~<br />
lion of turbine rpfn. Vibration of the Jet engine<br />
housing, extreme fluctuations in temperature<br />
do not Influence accuracy of measurements.<br />
Kaman Transducers measure displacement<br />
between transducers and adjacent conductive<br />
surface without mechanical connection to<br />
the turbine blades. If you make measurements<br />
In hostile environments, send for technical<br />
data and application information on Kaman<br />
Nuclear's Variable Impedance Transducer.<br />
:Kaman Transducers Excel in Hostile Environments<br />
Kaman. Nuclear<br />
1700 GARDEN OF THE GODS ROAD, COLORADO SPRINGS. COLORADO 80007<br />
Telephone: (303) 473-5880 • TWX: (510) 431-4929<br />
PROBLEMATICAL RECREATIONS<br />
Show, with a simple example, that an irrational-number raised to<br />
an irrational poWer need not be irrational. -Contributed<br />
WESCON 1966 starts tomorrow and 8 is the number of the week!<br />
We'll explain. This year's show is .. 8-great-shows-in-one" featuring ·<br />
8 special product areas from communication and detection to .<br />
computers to air and space control systems. (<strong>The</strong>re are 5 other<br />
areas to see.) And we're happy to announce that our eighth puzzle<br />
bookie~ Problematical Recreations 8 , is available to all problem<br />
solvers during WESCON. Pick up your free copy at the Litton<br />
· booth #!507. We'll be on the main floor of the Los Angeles Sports·<br />
Arena displaying our latest advances and new products. Hope to<br />
. see you the 23rd through the 26th!<br />
ANSWER TO L.AST WEEK's PROBLEM: ·Let BC be the side opposite<br />
the 20° angle and D the point 10" from A on side AB. Construct<br />
triangle ADE congruent to ABC with EDIJBC. Join EC. <strong>The</strong>n<br />
triangle AEC is equilateral and angle DEC = 40°. T~iangle EDC<br />
is isosceles and angle EDC is 70°. Thus the stripe makes an angle<br />
of i50° (or itS supplement) with the edge.<br />
[8<br />
LITTON INDUSTRIES<br />
·. Beverly Hills, California ~htl98d<br />
plied; "I wouldn't reject this possibility.<br />
because a conventional smoke·-' .... g is an<br />
interesting example of a pl• i held<br />
together under the proper cond1tfons by<br />
a combination of internal and external<br />
forces whlch are difficult to explain<br />
scientifically."<br />
This seems an appropriate analogy<br />
because not every instance of corona<br />
along power lines generates ball lightning.<br />
<strong>The</strong> presence of salt vapor near<br />
Exeter would increase the conductivity<br />
of the air, and vaporization of the salt<br />
crystals deposited ·during the dry summer<br />
could provide a mechanism for<br />
increasing current flow and air temperature<br />
once corona occurred. Other contaminants<br />
in the air at Exeter and at<br />
other locations could provide similar<br />
catalytic action.<br />
A spokesman for the National Investigations<br />
Committee on Aerial Phenomena<br />
(NICAP), quoted by Fuller,<br />
says that UFO "sightings seem to concentrate<br />
in small geographic areas during<br />
any wave. But the concentration<br />
area will shift around. •• This indicates<br />
that when the required combination of<br />
atmospheric conditions exists, the phenomenon<br />
occurs repeatedly.<br />
It seems more than coincidence that<br />
·only one of the dozens of Exeter UFO<br />
sightings reported by Fuller occurred<br />
in broad daylight. This prompted one<br />
police officer who was interviewed by<br />
Fuller to ask: "Where does it go in the<br />
daytime?"<br />
It is possible that the necessary atmospheric<br />
conditions) including air contaminants,·<br />
do not occur until the cooler·<br />
night air arrives. Another possible explanation<br />
is that the luminous plasma<br />
of ionized air usually is too faint to be<br />
easily visible in daylight, although it<br />
could appear quite bright in the dark.<br />
In the photograph taken by Lucci<br />
near Pittsburgh, using a 6~sec. exposure,<br />
the UFO appears to have about the<br />
same brightness as the full moon alongside<br />
it. 1<br />
Westinghouse's Dr. Martin Uman<br />
suggests several possible tests which can<br />
be made in the presence of a UFO sighting<br />
to confirm or deny the ball lightning<br />
theory. )f it is an electrical discharge.<br />
it should generate radio noise.<br />
At least several persons interviewed by<br />
Fuller reported that their automobile<br />
radios had briefly become inoperative<br />
·when the object came near.<br />
If the object is viewed through ·an<br />
inexp~nsive prism or transmission grating<br />
it should be possible to ascertain<br />
whether the. object is a solid spacecraft .<br />
or a form of ball lightning, Dr. Uman '<br />
points out. If the obj.ect is a solid, the<br />
viewer will see a continuous spectrum~<br />
but if it is a form of ball lightning !J.e<br />
will see instead a number of individual<br />
colqr lines, including intense red~ radiatiOn-<br />
due to the presence of hydrogen<br />
and blue due to nitrogen in the air._ ·<br />
60 Aviation Week & Space }e-?hnology, August 2~, 1966
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