Posted by Clarkbug on October 03, 2008 at 06:41:14 from (72.66.34.60):
In Reply to: Battery chargers? posted by s.crum on October 03, 2008 at 05:56:47:
Kentb of SWMO said: REMEMBER THE HINDINBURG !!!!!
Kent
Actually, to go a little off topic....
The Hindenburg didnt burst into flames because of the hydrogen inside of it. The zeppelin was painted using a mixture that included powdered aluminum oxide. This is commonly used today as solid rocket propellant. When the blimp came into dock, it lowered its ropes so that the ground crew could grab them and pull it in. However, this was during a fierce rainstorm with plenty of lightning. The ropes got wet, and became like grounding rods, making the big floating metal thing a really easy target for lightning strikes.
After a few, the bladder itself began to burn from the aluminum oxide.
The famous picture with the flames coming off of it is actually of the fuel for the engines burning (the fire is below the ship, from the falling fuel)
If the hydrogen had been what caused the fire, the entire top would have exploded, rather than burned. Also, the flames would be going up, since the hydrogen would rise, rather than falling.
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Today's Featured Article - The Nuts and Bolts of Fasteners - Part 2 - by Curtis Von Fange. In our previous article we discussed capscrews, bolts, and nuts along with their relative hardness and thread sizes. In this segment we will finish up on our fasteners and then work with ways to keep them from loosening up in the field. Capscrews, bolts and nuts are not the only means of holding two parts together. When dealing with thinner metals like sheet tin, a long bolt and
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