[TowerTalk] R.E. NASA shuttle lightning protection vs tower protection

[Nick Pair]

O.K.
  Here is link to an interesting photo;http://www.lightningsafety.noaa.gov/photos.htm Last photo on right side.
  You can see the mast that supports the lightning protection wire and how it is avoided.
  There are more references available but you must remember that NASA doesn't really want to make this a big public issue.
  This whole thing just points out that lightning is something that the number of variables prevents total protection from.

  Nick
  WB7PEK
Merlin-7 KI4ILB <merlin-7 at sc.rr.com> wrote:
  think I need to differ with you on the shuttle being hit by lightning on
the pad...There are long wires going from the top ot the launch platform
(they look like and inverted v antenna, just a lot longer) with one of the
best grounding systems made attached to them. I talked with Mike Mullane,
monday I think maybe sunday. After the shuttle was held for fear of
lightning and water droplets that the shuttle might fly thru...
The shuttle should not fly thru water droplets due to the fact that it
would make the tiles on the shuttle rough and mess up the atmospheric drag.
Anyway...he said that there is no way lightning could hit the shuttle on
the pad due to the lightning protection system at both pads...39-a and 39-b.

As for the foam problem ...I think that I could fix that but I do not know
about the added weight problems ...
Just add a scrim of fiberglass or carbon fiber over the foam and glue it to
the foam with latex or some other adhesive. That way if some foam did come
lose it could not go anywhere. Like I said, I do not know the total surface
area of the tank and do not know how much weight that would add..
I do know that no matter what it adds, that it would take something from
the cargo capacity....
Joe KI4ILB


 		
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