It's actually spelt "Khalifa".

>> ^Hybrid:
It's actually spelt "Khalifa".


Ah, thanks! Corrected the title

A minute and a half? Can that be right? My intuition is that it would be more like 15 seconds.

Well,

d = vi t + 1/2 a t^2
828 = (0)t + 1/2(9.81)t^2
1656 = 9.81t^2
168.80733945 = t^2
t = 12.992587866

So yes, without drag, it would take about 13 seconds to fall that distance. (http://xkcd.com/669/)

However, BASE jumpers deal with a lot of drag. From http://www.stealingaltitude.com/BASE_JumpingFAQ.htm#13 :

"On average, a normally clothed average-weighted BASE jumper freefalling from a 500 foot building will impact in about 6 seconds. In this scenario most jumpers I knew would take a "delay" of two or three seconds before opening the parachute.

According to BASEjumper.com the current unofficial record is a two minute freefall made by Yuri Kuznetsov in the summer of 2005. He used a wingsuit to achieve this incredible feat, I don't know where the jump was or how high the jump started.

The development of the wingsuit (originally intended for skydiving) in the 1990s brought a freefall revolution in BASE jumping. The wingsuit allows jumpers to make incredibly long freefall descents along sloping mountains and cliffs, soaring like birds of prey, falling at half the normal terminal velocity. For reference, consider this: prior to the wingsuit, jumpers making outlaw leaps off of Half Dome could freefall for just under ten seconds before opening very low, near impact, over the rocky, sloping talos. Today, an experienced wingsuit flyer leaping from Half Dome can soar over 50 seconds, maneuvering over the talos and down mountainside itself until reaching the valley below. NOTE: parachuting in Yosemite National Park is strictly illegal and heavily enforced."

is fun legal there?

Nice jump, but I liked the illegal one better.

Did the brick they shat on the way down deal with less drag and get there first? Mine would have.