That are my two K'nex rides: Kingda Ka and Zumanjaro
Facts about my K'nex Kingda Ka:
Built in January 2014
Height: 4,56ft (100 times smaller than the original one)
Length: 16ft
Lauch System: rubber band
Brake System: friction brake
Facts about my K'nex Zumanjaro Drop of Doom:
Built in June 2014
Height: 4,15ft (100 times smaller than the original)
Up: push up by hand
Down: pull on a rope to release the drop
Brake System: magnetic brake
If you want them see in action, here is the link to the K'nex Zumanjaro:
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[/youtu_be]And my K'nex Kingda Ka:
[youtu_be]
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An overview
Kingda Ka's launch cable, Zumanjaro's magnetic break and Zumanjaro's rope to release the drop
The height of both rides but that is in centimeters and not in feet or inches!
View from the top of the rides