DexterBase

Anybody have a good email for BASE 386? I have a paper I need him to look over.

Actually, I am really hoping Nick will fill this thread in. It's a very fascinating story and every time I hear it, I'm inspired to get in the car and go object hunting. PLEEEEEEEEEASE tell the story Nick.... will ya?

I have no idea how to go about getting a patent. I think one of the manufacturers would probably be able to make some money off of it though. If they sold these I would have bought one a long time ago. Maybe they'll have some input.

In the months leading up to bridgeday, there's traditionally been a run on used BASE gear. This makes it a good time to offload extra rigs, but a bad time to try and buy something good. Good luck.

The breakcord is the weak link in the system and you want to protect it from the object itself. You need the breakcord to part at 80 pounds to ensure a safe deployment. If you're on a low jump and the breakcord parts before the canopy is at line stretch (or even extracted........ chills...) you're done. If you loop the breakcord over a handrail with a sharp edge or a piece of angle iron, your static line could break at a much lower tension.

Is there a way to change your name without losing all your post history and stuff like that? I'm sure the moderators could change your username without losing everything else...?

Hey 689, I went back to the proverbial drawing board and this is what I came up with. It's super clean but would require a rigger to construct it. I like it, let me know what you think...

You can buy gemini cord at any REI or climbing store. I like the sewn spectra slings because there's no knots to snag on. The double or triple fisherman knot used to loop gemini cord (like when you thread larger hexes) can be a pretty good snag point if you don't pay close attention to where you place the knot. Also, gemini is pretty slippery and if you're unfamiliar with the proper knot to use, your loop can fail. A sewn and rated spectra sling doesn't have these problems. I don't see how gemini cord would offer any advantage over a spectra sling.

That was exactly the explanation I was looking for. Thank you for taking the time to write that. I also spent a few hours researching various pulley systems and mechanical advantage and came to all the same conclusions. I stand corrected. I am still going to do pull tests and see how much I can vary the breaking strengths. I do know that you can greatly vary the distributed load (and thereby changing the breaking point) by changing the angle of the sling. As far as why I used the rapide, that's a good question. A girth hitch (larkshead) is a better choice. I guess it stems from my climbing background where nylon rubbing on nylon is bad. In this situation where friction is a minimal concern, the larkshead is the way to go. Back to the drawing board....

You still captured the essence of the problem. I liked your drawing. If you want to see how it's really done, check out my crappy drawing in the static line thread!

My logic is that since spectra slings don't stretch at all, the load will be transferred to the breakcord. The pilot chute was left off the illustration for simplicity. I had hard enough time drawing a passable rapide, can you imagine if I'd tried to draw a pilot chute??? I wonder if we could recruit a physics wizard to explain exactly how this setup would transfer load to the breakcord. Edit: After more thinking about this, it seems to me that the pulley effect is not an issue. If one end of the breakcord was anchored to the bridge after running aroung a handrail or beam, then I could see how the friction from the "pulley" point could be an issue. The way I set it up, the breakcord will start loading the instant weight is applied. It seems to me that since both ends of the static line sling are attached to the same loadpoint, that both sides must share equal amounts of the force. Since the breakcord will part at 80 pounds, as soon as the system is loaded to that point, the breakcord will give. It's a weak link designed into the system.

I had an idea for a system that wouldn't leave anything behind at the anchor point. I thought of the snag possibilities when the sling whips around, but as long as there aren't any huge burrs on the beam or rail, it should be okay. The spectra is very strong so I'm confident the system will give exactly where it's supposed to. Let me know if you see any problems with it. P.S. If my highschool drafting teacher saw this he'd kick my ass.

I think they're calling it the TRV-22E.

Reading it wrong. There's a . in front of that 5 on the scale. Also, since there's 5,280 feet in a mile, the runway length puts it into perspective also.

IMO, you're far less likely to see a malfunction video related to a ROL simply because they're far less common. You're probably less likely to see any video of a ROL deployment though. Just my thoughts.

You'd have to ask the owner. A Reactor can take two size canopies usually but if the 225 is already the bigger of the two compatible sizes, then no. I don't know if you've ever tried to pack a tight velcro rig, but I have and it's terrible. It's so hard to close the container that you'd end up distorting the hell out of the packjob. Once you did get it closed, if you could, it wouldn't stay closed. As soon as you bent over to tighten a strap or pick up your helmet, or climb a fence/ladder... pop! Out comes the canopy. Right in the dirt. Whew! What a waste of time. I actually had a rig open on me at the exit point once. Yeah, I don't jump that rig anymore. If you've seen how slow I pack, you'll understand what I mean. edit: Typo

Hey, maybe if I point it out in a polite email they'll give me free stuff.

Exactly! If that rig is a tight one, there may be too much pressure on the bridle to allow the top pin to be pulled. Many BASE rigs- and skydiving rigs- have a velcro tab to remind you to leave slack above the pin. Pretty scary, but I think it illustrates how detail attentive you need to be in this sport. Of course since I don't jump this rig (Gargoyle), or have any experience with it, there may be something I don't see.

Does anyone else see anything wrong with this? I'll let people reply before saying anything. edit: Oh yeah, pic is off the Morpheus site.

You might want to head over to Blinc and read the knowledge BASE articles. Lukas Knutsson (rip) wrote an article on subterminal tracking. He was a tracking badass, so it would probably be a good thing to look over. Of course if you haven't read all that stuff, you should spend an afternoon reading those articles. Knowledge BASE

No, I haven't asked him but now that I think about it, it seems like a pretty good idea. I did buy a BASE rig off of him a few years back though... Do you have his email?

Yes you are. You are going to learn some really cool packing techniques. I've had riggers watch my BASE packs and trip out. It's cool to have a rigger tell you he started doing something himself that he saw you do on a pack job! >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>> I disagree. Most BASE (and reserve) pack jobs start out on their side, but quickly become very neat PRO packs. Several of the tricks I use while packing reserves I learned from the people who now run Basic Research. I know this is an older thread, but I was hoping you'd read it again and explain exactly which part of my post you disagree with. Just curious... I learned flat packing after I had already been BASE jumping (I wanted to save a little $$$ by packing student rigs and that's how my dzo wanted them packed) and what I saw horrified me. I couldn't imagine why anyone would prefer that method over a propack. Basic Research is still recommending starting on the ground, but CR says start like any regular over-the-shoulder PRO pack.

As would most people... probably me too.

Wow, I hope I'm not dead too but nobody has the heart to tell me... eeeeesh

550 cord is actually pretty thin to be using it for a tourniquet. It's better to use something flat, like webbing. A cool trick is to use an ACE wrap. If you wrap it tightly, stretching it as you wrap, it's elasticity will make an effective tourniquet for most arterial bleeds. If that won't work (say a major vessel), grab a stick and start twisting. But an ACE wrap is compact and has many uses for splinting, pressure dressings, sprains, and more. Use your imagination. The 550 cord is fine if it's all you have to work with, but if you're taking it for the purpose, consider taking an ACE wrap instead. I've been writing a paper on BASE specific first aid and injuries. It's still quite far from being done but I'll try to accelerate my work on it and get it up here.