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January 1965 Electronics World
Table
of Contents
Wax nostalgic about and learn from the history of early electronics. See articles
from
Electronics World, published May 1959
- December 1971. All copyrights hereby acknowledged.
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 If you ever have the opportunity
to read the history of the engineering efforts that went into designing and building
the Saturn V rocket, you will be amazed at the ingenuity and incredible work
that went into its creation. Margins of error approached single digits in some instances,
like with some of the fuel tanks. According to the book NASA Apollo 11: An Insight
into the Hardware from the First Manned Mission to Land on the Moon, re-design
was constantly required to remove weight from already-completed assemblies in order
to compensate for overweight components that could not be kept within their budget
allocations. Some portions of fuel tanks were so thin that a finger poke would deform
the container. This news item from a 1965 edition of Electronics World
magazine
reports on work being done with a powerful magnetic hammer on a fuel tank section.
Note the absence of hearing protection or any other kind of safety device on the
technician.
Electromagnetic Hammer
 A magnetic hammer is being used at NASA's Marshall Space Flight Center at Huntsville,
Ala. to smooth out distortions in segments of the Saturn V fuel tank. Eight of the
segments are joined to form the dome-shaped end of the tank. The hammer's force
results from a strong magnetic field set up for about 500 microseconds from the
high-voltage power supply. The segments, costing about $30,000 each, are made to
such close tolerances that distortion from welding fittings into them, such as the
one in the center, makes them useless. The hammer has salvaged 8 segments.
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