ZIP IT - CLIP IT - SINK IT - HOVER IT Research Links
HELICOPTER DIAGRAM
HISTORY OF THE HELICOPTER
HOW A HELICOPTER WORKS - LINK 1
HOW DOES A HELICOPTER WORK
ZIP LINE DIAGRAM
HISTORY OF THE ZIPLINE
HOW A ZIP LINE WORKS LINK 1
HOW DOES A ZIP LINE WORK - LINK 2
SUBMARINE DIAGRAM
HISTORY OF THE SUBMARINE
ALL LINKS
HOW SUBMARINES WORK - LINK 1
HOW A SUBMARINE WORKS - LINK 2 - Video
HOW A SUBMARINE WORKS - LINK 3