Jump viability

guest · May 21st, 2000, 11:49 AM

the jump involves a downtown situation with wind often coming in from a body of water. the building is 943ft tall and on a hill another 500+ above water level. the idea is to jump from the building onto a 36' boat. the ground distance is just shy a mile and fighting a head wind.

I am not seriously considering this, just hypothesizing. would this be viable? Variables deault to most appropriate equipment for the jump.

thanks,

Peyton

guest · May 21st, 2000, 04:55 PM

I suggest you wear a wet suit and a life jacket.

**space** · May 21st, 2000, 10:08 PM

^No need for the wetsuit or life jacket. One would need a canopy thruster to compensate for the head wind first.
space

guest · May 25th, 2000, 09:33 AM

so if the jump happens on a negligable wind day, take a life vest?

**space** · May 25th, 2000, 10:59 AM

Hi Peyton,
I bust you as a troller...but I will try to help you answer your viability question if you give me this info, How long of a free fall, what would be your glideangle with the set up you intend to use, what would be the acceptable wind direction and speed parameters.....
and last, what kind of boat/how is your accuracy?
As a sailor, I know that most 36´r boats are masted cabin cruisers or higher masted sailboats, (I´m leaving out fishing vessels because their booms and cable-ing leaving little area for for any on deck landing).Because of the masts and cabin, on a 36´r boat you will have about 2 meters max on the bow usable if you take off the hand rail, i can go on about if the boat is anchored and wind/currentvaning, or freefloating and wind/currentvaning but I think I´ve wasted enough time guessing without the info one would need to accurately determine all this for a glide ratio that doesn´t exist in todays base canopies.
later,
space

guest · May 28th, 2000, 09:33 AM

Troller?? Like fishing for answers? I believe I could say yeah I'm busted.

I'll try for the answers you are asking for.

this may be in reverse order. it's a tourism boat around 36'. the top most deck is 90% open.
multiple decks. so no worries of masts and very few antenna.the boat would be on station free floating.
wind speed and direction are going difficult to gauge. 5-7 mph easterly, topographically this should cause updrafts coming off the Sound. northerly would work although I can see impact with a building entirely to likely. westerly would cut any lift.
negligeable freefall 2 seconds top, 6/5 drop to lateral.

I'll say this. from what I've read on this site, I have an immense amount of respect for those who are willing to jump.

Space, thanks for giving me the time. You definately didn't have to.

Peyton

**space** · May 28th, 2000, 11:44 AM

Hi Peyton,
The viability can be analyzed using GPS tracking with a digital altimeter/rate of ascent-desent all in one unit, Basically with this unit, you can find out your glideangle. Then bring the unit to the LZ position, mark it, go to the exit point, mark it, and the unit can tell you the glide angle or altitude you need to make it there, and by how many meters/feet you need or have in surplus to reach the intended LZ. It can of course be used inflight to let you know after opening the viability of reaching the target early in your canopy flight so you know if you have to abort and take an alternate landing area which you could mark also with the system for needed glideangles values.
The next thing you would need to further the possibilities, is to read "Understanding the Sky" by Dennis Pagen. A basic understanding of micrometeorology and how sea or lake winds can help or hurt your chances would be very helpfull for you if you are serious....
An optional thing you can do is hire me to make a site/jump eval, I have also the experience of being a sailor and have positioned boats before for landing jumpers, and have been a site/jump evaluator/consultant for several hi profile jumps.
So if you are serious, the technology is available. I will find you the name and manufacturer of the unit I have described if you wish..Or just contact me directly via email for anything else...
Hope these are the answers that you were trolling for, and it helps.
later,
space

guest · June 2nd, 2000, 01:58 AM

Space ,

I would be interested to find more info about this gadget you are talking about. If you could give a hyperlink it would be much appreciated.

Thanks in advance

bsbd

Geoff

**space** · June 2nd, 2000, 03:21 AM

Try
www.brauniger.com
click on IQ serie
Scroll down you get the english version of the tech data, after you read that, scroll down more to the tech terms Definitions and click on Final Approach Calculation among others.
The IQ series is designed to work in conjunction with a GPS, which means that you will have to buy a GPS to go with it, There is another company that has an integral unit of which I will try to find if you need it.
Take care,
space

guest · June 2nd, 2000, 09:21 AM

hey space,

you answered more than I was expecting honestly.
I think I can figure the jump out at this point.
just for Grins, I have no where near the experience to jump from the columbia tower.

once again, thanks.

Peyton

**space** · June 2nd, 2000, 11:31 PM

As I stated before, you can actually hire professionals to do a site/jump eval. and have them train you, paying particular attention, to training you, in the skills, that you will need for the maximum margin of safety. You have enough info already to make an informed decision on how/if to proceed. Let me know how it turns out..

Cya
space