Why do you use two rings in the delta quicklink? Higher up in the chain it's all connected through a single ring anyways. And I was recently looking through the manuals for quicklinks, and apparently they recommend using a torque wrench to tighten the gate (same for the screws in the rings I thinks), do you carry one on the truck? Or is a regular wrench/finger tight good enough for you?
Two rings are a permanent part of the head bridle of the litter & intended for redundancy & strength when using the litter in other applications, for example on a basic steep angle orientation where the entire load is supported using only the head bridle, and you have 3x litter tenders plus a patient (I have another video on that). In the applications shown in this video you don’t necessarily need two rings & could just let one of them hang, but that could possibly confuse people even further. Plus if the litter bridle needs to be rigged in a super low-profile way, then the internal bridle catenary angle increases which can exponentially amplify the forces seen within the bridle components. The OSHA & SPRAT answer on the screw links is yes you should tighten the links down with a wrench to torque specs…. but let’s be real; professional rescuers in a dynamic environment should be more concerned with the amount of stuff they have to carry around, the weight of it all, & the ability to easily make connections & disconnections on the fly quickly. The only time & place I have ever exercised the practice of using a wrench to tighten a screw-link was during a formal SPRAT certification course.
Why do you use a fixed length backup versus an adjustable (like a Connect Adjust)? It is for the simplicity that a fixed length provides? Excellent video
Thanks, Yes mainly to just throw in a bit of simplicity, but any adjustable lanyard will work as well, & will probably work better. But these fixed lanyards have a nice length, light enough, & packable enough to fit into a bag along w/ the carriage & reeving assemblies.
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Why do you use two rings in the delta quicklink? Higher up in the chain it's all connected through a single ring anyways. And I was recently looking through the manuals for quicklinks, and apparently they recommend using a torque wrench to tighten the gate (same for the screws in the rings I thinks), do you carry one on the truck? Or is a regular wrench/finger tight good enough for you?
Two rings are a permanent part of the head bridle of the litter & intended for redundancy & strength when using the litter in other applications, for example on a basic steep angle orientation where the entire load is supported using only the head bridle, and you have 3x litter tenders plus a patient (I have another video on that). In the applications shown in this video you don’t necessarily need two rings & could just let one of them hang, but that could possibly confuse people even further. Plus if the litter bridle needs to be rigged in a super low-profile way, then the internal bridle catenary angle increases which can exponentially amplify the forces seen within the bridle components.
The OSHA & SPRAT answer on the screw links is yes you should tighten the links down with a wrench to torque specs…. but let’s be real; professional rescuers in a dynamic environment should be more concerned with the amount of stuff they have to carry around, the weight of it all, & the ability to easily make connections & disconnections on the fly quickly. The only time & place I have ever exercised the practice of using a wrench to tighten a screw-link was during a formal SPRAT certification course.
Why do you use a fixed length backup versus an adjustable (like a Connect Adjust)? It is for the simplicity that a fixed length provides? Excellent video
Thanks, Yes mainly to just throw in a bit of simplicity, but any adjustable lanyard will work as well, & will probably work better. But these fixed lanyards have a nice length, light enough, & packable enough to fit into a bag along w/ the carriage & reeving assemblies.
are those petzl plates only held together by the lashing on top?
No. There are 5 permanent gold rings on the bottom that also keep the Reeves paired together