More steel in the United States is used to make bottle caps than to manufacture automobile bodies.
55
Whale oil was used in automobile transmissions as late as 1973.
56
The oil used by jewelers to lubricate clocks and watches costs about $3,000 a gallon.
41
A small airplane can fly backwards.
75
The first hard drive available for the Apple II had a capacity of only 5 megabytes.
46
An airplane mechanic invented Slinky while he was playing with engine parts and realized the possible secondary use for the springs.
12


