Basejumper.com - archive

Thought this might make you guys laugh and this is one site I don't mind naming.

This is the second tallest A we have in SA and the engineers made it with 6 guy wires

Only in SA... Stupid A

Hahahaha. How high?

886ft on record, but the recorded heights here are usually 40ft higher so i would say in the 850 range.

Its so depressing It would have been 100km closer for me to drive than my current 806ft A

Am I just looking at this wrong, or are all the wires off of one side? It looks to me like all the wires are from about 12 o'clock and 7 o'clock, no?

Difficult to tell exactly what's going on there at that resolution. Are the guy wires in line with the tracks? If so, it looks like you've got about a 165 degree open sector that is guaranteed to be in the lee of the prevailing wind. That'd make wire strikes about as impossible as you could get short of jumping a freestander!

Kinda sounds unlikely though, so I'm guessing the wires are equally spaced, and you just can't see them on the image.

The link doesn't show the wires clearly, but they are in line with the tracks on the one side and do exist on the opposite side as well.

I think it would be a big engineering fail if they only put wires on one side

I will try get a picture for you guys next time I'm out that way.

Now that i have been looking at it for a while...I kind of wanna jump it
You know, just as one of those once off fun jumps.


HHhhhhhmmmmm????

Go for it, it looks like perfectly doable. You can easily calculate the max canopy time you can allow yourself to have as an equation between your canopys forward speed and the separation you can get from the tower.

Given the assumption that you have 6 sets of wires spread equally around the tower you have 60 degrees of sector to jump into. Also under the assumption that you jump in the middle of the sector the wire is on a 30 degree angle to jump direction. With given separation X from the tower the distance to the wire (with 90 deg offheading) is then tan(30) * X. Of course with that information if you divide it with your canopy speed with brakes stowed you have the time your canopy takes to fly to the wire with no input.

Please find below 3 PDF's illustrating this with 1,2 and 3m/s forward speed and separation values between 1 to 50m. For example with 2m/s forward speed and 20m clearance to the tower you will have 11.5m separation to the wire and you will hit the wire in 5.8 seconds.

http://markus.ufufreefly.com/6_wire_A_1.pdf
http://markus.ufufreefly.com/6_wire_A_2.pdf
http://markus.ufufreefly.com/6_wire_A_3.pdf

So do your math and harden the fuck up and jump! And pull low enough!

(Yes, it was a boring day at the office. :) )

Just go for it...SA BASE jumpers are unbreakable anyway

similar to australian BJ's

Looks like a reasonable Prodigy jump if you fly it a bit and pull low enough.

If the winds are blowing like 50 mph between the wires, you should be fine.