Hypothetical:
Suppose you are launching poised from the face of a building (not a corner). The building is verticle. You dont have to pull high to make a good landing area. No wind.
How low will you take your slider?
MB
Hypothetical:
Suppose you are launching poised from the face of a building (not a corner). The building is verticle. You dont have to pull high to make a good landing area. No wind.
How low will you take your slider?
MB
...vertical as in sheer?...do you mean how low as far as delay?...I'm not so sure I understand the question...plz clarify...
I guess the question is better stated: How high does the building (or sheer cliff) have to be for you put the slider on?
Everyone has their own limits. I was just curious. I was thinking in the 550 600 foot range.
MB
No wind? perfect landing area? Good stable launch? 486 ft, dude. 2 second delay, no micro reefing, 42 inch pilot chute. Oh, yes. and some balls too.
except the part where you jumped over water
bob was talking about a building
no slider for 2 seconds jump
Hi Bob:
The lowest building I have launched in exactly those circumstances (standing launch, slider, etc) was around 600 ft.
It's the tall, black, glass building that headquarters a major financial institution in a city just to your north.
Hypothetically, if you were talking about that building, and you did want to do it, you probably ought to give me a call.
--Tom Aiello
tbaiello@ucdavis.edu
after 500 BASE-Jumps, I would rather take a solid 3 sec delay slider down, than a 4 sec slider up on anything less than 800'.
>after 500 BASE-Jumps, I would rather take a
>solid 3 sec delay slider down, than a 4 sec
>slider up on anything less than 800'.
Generalized statements like this can be very dangerous if taken as an absolute rule.
There are many (i.e. more than 75) sub 800' objects in the world where it is much safer to take a 4 second delay slider up than a 3 second delay slider down. Depending on the shape of the object and the wind conditions present, it can be much safer to open lower with a greater chance of an offheading, than higher.
Australia has a classic example of this that is jumped frequently. The LP in the Blue Mountains (jumped first by Pete F #173 in 1995) is about 730' high and requires a running exit and 4+ second delay to clear a massive bulge in the wall. Jumping this object slider down would significantly increase the risk of an object strike.
For optimum safety on a jump, the slider configuration and delay is determined by many more factors than just the altitude. Object shape, wind conditions at different altitudes, jumper skill level, equipment and equipment configuration all play a critical role in determining the delay.
>Even people at the Petronas (1,200') went slider up and hit the building.
All (but four) of the Petronas jumps done in Aug/Sep 2001 were from 870' to impact. The jump was made very close to vertical by an exit ramp extending out from the building. Slider up jumping was made mandatory (except in two special occasions) and jumpers were required to do 4 second delays minimum for safety reasons. One jumper was removed from the event for demonstrating the inability to break the 4 second mark.
It was a group consensus that given various factors (altitude, common wind conditions, the setback at level 60, etc) slider up jumping was generally safer than slider down jumping from level 73 on this building.
As previously mentioned on this board, the reasons for the two object strikes (out of 570+ jumps) were as follows: incorrect gear configuration (p/c asymmetrically attached to bridle which caused a radically orbiting p/c which in turn induced line twists on deployment) and brake settings too shallow (factory set brake settings on a Mojo 240 which created unacceptably fast forward speed on deployment giving the jumper minimal time to deal with an offheading). No serious injuries resulted from impact with the building. The worst injury occurred on landing. It is likely that a PLF (Parachute Landing Fall) would have prevented this.
>A building is the most advanced object in most cases
There are tens of thousands of cliff jumps possible that are far more advanced than any building. At this present time many jumpers choose not to jump cliff objects that are more difficult than the average building. As the average skill level in the sport advances, this will change.
Note: On average a 4 second delay (which means you throw your p/c around 240' below exit) with slider up opening uses about 450 - 500 feet from exit to full pressurization. This figure varies WIDELY depending on body weight, wing loading, equipment, equipment configuration, wind conditions and air density (to name but a few). A slight snivel or p/c hesitation can chew up an extra 100 feet no problem.
i'd jump it with my oversize mesh up, but not the factory mesh.
if you can't get a rigger to build you a slider out of that funky mesh with the 6X12mm holes, you're probably better off doing without on a solid object of this height.
dear MB, in my humble mind i think that unless your doing more than 3 seconds delay, don't even bother with a slider they give worse performance for on heading openings than does no slider,
see ya
BEEV:x
You need to be getting a 4+ second delay to go slider up. If you do not go at least 4 seconds, you will not have enough airspeed to actually force the slider down.
So, if you do a 3 second delay, and you have a 180, you will be pretty close to the building (maybe only 15'). Then tie that with the fact that you loose about 1-3 seconds for inflation. You loose any chance to correct the problem before impact.
Even people at the Petronas (1,200') went slider up and hit the building.
A building is the most advanced object in most cases. Slider up building jumps are VERY advanced.
Get real experience before you try something above your abilities.
That better be a very big building!
I think Yuri may say this. People who went slider off at petronas were just asking for it. Why not use more of the 1200 feet, and get a little farther away before deploying. I'm (Thomas) not saying take a wingsuit off it, but at least a 5-7 sec would be better off, and farther from the buliding. Longer delays==farther from object. I think I heard this somewhere before????
Anyways, why not go slider up off petronas? So inexperienced that you can only handle throw and go's???? Go ahead Robin, insert your ""orginization" piece here.
Take it lower, and get better results. Um........I've seen DW take slider off Perrine, and get pretty good openings. Course, that;s with two to three flips, maybe with twists. More delay=better slider openings.
Peace,
Thomas
I do not think I would jump Petronas without a slider because it is underhung. I never said to do such a thing.
But, if you want to talk about the 500' building mentioned in this thread, I think it is stupid. You will not be able to take a 4 or 5 second delay. I would be very supprised if I am wrong.
Perine is 485 and you have very little time to get oriented slider up. If you are on a building, there are soo many things to look out for. cars, power lines, people etc.......
I personally would consider taking a wingsuit off petronas because I have 100+ BASE wingsuit jumps.
Skyflyer jump from Petronas. I exited from the gondola, took a 9.5 second delay and was still able to hit the pad on landing.
in the previous post, I meant slider up at Perrine. yeah, not slider off. when I said slider off perrine, I was saying like "take a slider, from the perrine" ahhh whatever, just thought i'd straighten it out a bit
Thomas:-) :-) :-)
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