Search Results for: efficiency

Functionality of Mechanical Advantage and Considerations

The Mechanical Advantage (MA) systems used in rescue incorporate one of the most elegant simple machines known to man, the pulley. While it is Newtonian Physics that explains how pulleys work, we owe the Sicilian mathematician Archimedes for its invention. History tells us that Archimedes boasted to his king that with enough pulleys he could …

Functionality of Mechanical Advantage and Considerations Read More »

Mechanical Advantage, Part 1

Thanks to Peak Rescue Institute Full Video at the bottom! In general, the Ideal Mechanical Advantage (IMA) is the ratio between the distance the load moves and distances the haul team moves. In a 2:1 system the load will move 1′ to every 2′ of haul. However, this does not mean that lifting the load is twice …

Mechanical Advantage, Part 1 Read More »

Petzl Maestro – An Amazing Tool For Technical Rescue Operations

PETZL MAESTRO (Small and Large) is a descender designed for technical rescue operations. It facilitates the manipulation of heavy loads, for lowering or hauling, and may be used in both the primary system or in a back-up belay. This versatility allows rescuers to adapt to any situation they may encounter on the rescue scene. The …

Petzl Maestro – An Amazing Tool For Technical Rescue Operations Read More »

CONFINED SPACE RESCUE WITH THE PETZL MAESTRO

The PETZL MAESTRO is a descent control device with an integral progress capture pulley for technical rescues. Additional MAESTRO benefits include:  Shifting from a haul to lower is immediate and efficient without having to transfer the load Can efficiently haul and lower heavy loads Serve as the primary or back-up system A small hole on …

CONFINED SPACE RESCUE WITH THE PETZL MAESTRO Read More »

Comparison between Petzl MAESTRO and PETZL I’D for a rescue using twin tensioned haul lines

MAESTRO and I’D allow for efficient hauling, releasing the lock at any time and a controlled lower of the load. The two devices have different ergonomics and different specifications (working load and efficiency). Hauling The MAESTRO’s efficiency enables effective use of simple pulley systems. If a complex pulley system is needed to increase efficiency, it …

Comparison between Petzl MAESTRO and PETZL I’D for a rescue using twin tensioned haul lines Read More »

Two MAESTRO, I’D or RIG (used in parallel by a single operator)

The MAESTRO, I’D or RIG descenders can be used in parallel in rescue situations, mainly with long rope lengths and smaller rescue teams. This technique enables a single user to simultaneously operate two devices.   Advantages Even sharing of the load on the descenders Reduced potential extension of the system, in case one of the …

Two MAESTRO, I’D or RIG (used in parallel by a single operator) Read More »

The Cost of Doing Business with a Dynamic Directional Between Gin-pole and A-Frame

The cost of rope rescue rigging and training, much less a rescue, has some inherent expenditures.  There is the direct cost of the gear, which to some might seem like a lot, but in reality it pales in comparison to the costs of personnel and training.  These can easily be broken down into professionals who …

The Cost of Doing Business with a Dynamic Directional Between Gin-pole and A-Frame Read More »

How to calculate mechanical advantage within a progression!

  A mechanical advantage haul system reduces the effort required to raise a load. The mechanical advantage obtained is based on the pulley effect.   1. The pulley effect If we consider a load suspended on a rope, the rope passing through a pulley above the user, with the user’s hand holding the rope on …

How to calculate mechanical advantage within a progression! Read More »