Beal Raider 11mm

The benchmark rope for special operations forces, the Beal Raider 11mm is a semi-static rope constructed from an Aramid sheath developed for rapid descent from helicopters. 

The Aramid sheath construction means that the rope can withstand extreme heat for a long period of time without melting. This is useful when carrying out numerous rapid descents from helicopters by Special Forces whilst using a descender without compromising the efficiency of the rope and the ropes sheath. 

Effect of High Temperatures on Aramid

The resistance of Aramid to high temperatures is best illustrated by the graph illustrating the residual strength after exposure to raised temperatures. Thus, we may for example see that after 10 hours of exposure at 200° C it retains 100 % of its strength, or that after 1 hour at 350° C it retains 90 % of its strength.

Test with Blowtorch

Semi-static rope holding a mass of 100 kg exposed to a temperature of 400° C (+ or- 50° C) for 15 minutes.

Results: Raider 11 mm rope: Residual strength around 1500 daN after 15 minutes.

Test Against a Red-Hot Bar

The rope supports a 100 kg mass. It is held clear of a 25mm bar heated red-hot. It is released against the bar and the time to rupture measured.

Results: Raider 11 mm: 18 seconds.