Table 2.

Mean static (μS) and kinetic (μK) friction coefficients and the difference between them (μS – μK) (followed by standard errors in parentheses) for each rope and ring combination; only new ropes are includedz.

RopeRingμSμKμS – μKArea (cm2/in2)
APPAL0.24 (0.003) a0.21 (0.002) a0.030 (0.0024)*21.10 (3.226/0.516)
APSTEEL0.26 (0.003) b0.23 (0.002) b0.026 (0.0024)*
BLAZEPAL0.21 (0.003) a0.20 (0.002) a0.014 (0.0020)*
BLAZESTEEL0.24 (0.003) b0.22 (0.002) b0.021 (0.0021)*
BSPAL0.23 (0.003) a0.22 (0.002) a0.014 (0.0023)*22.19 (0.147/0.024)
BSSTEEL0.27 (0.003) b0.25 (0.002) b0.017 (0.0024)*
FLYAL0.29 (0.004) a0.28 (0.003) a0.015 (0.0030)*
FLYPAL0.27 (0.003) b0.25 (0.002) b0.018 (0.0020)*
FLYSTEEL0.29 (0.003) a0.27 (0.002) a0.016 (0.0020)*
SBPAL0.23 (0.003) a0.22 (0.002) a0.018 (0.0023)*
SBSTEEL0.25 (0.003) b0.24 (0.002) b0.013 (0.0025)*
SB3PAL0.23 (0.003) a0.21 (0.002) a0.019 (0.0024)*
SB3STEEL0.25 (0.003) a0.23 (0.002) b0.016 (0.0024)*
SBHVAL0.26 (0.002) a0.24 (0.002) a0.020 (0.0019)*19.68 (0.806/0.129)
SBHVPAL0.23 (0.002) b0.20 (0.002) b0.022 (0.0018)*
SBHVSTEEL0.23 (0.002) b0.22 (0.002) c0.015 (0.0018)*
SPAL0.25 (0.004) a0.23 (0.003) a0.020 (0.0030)*
SPPAL0.22 (0.003) b0.21 (0.002) b0.012 (0.0021)*
SPSTEEL0.25 (0.003) a0.24 (0.002) a0.017 (0.0020)*
TBAL0.26 (0.002) a0.24 (0.002) a0.018 (0.0019)*21.10 (0.677/0.108)
TBPAL0.22 (0.002) b0.20 (0.002) b0.017 (0.0018)*
TBSTEEL0.23 (0.002) c0.22 (0.002) c0.016 (0.0018)*
TMPAL0.22 (0.003) a0.22 (0.002) a0.005 (0.0024)
TMSTEEL0.25 (0.003) b0.24 (0.002) b0.007 (0.0025)
XTCPPAL0.22 (0.002) a0.21 (0.002) a0.012 (0.0017)*
XTCPSTEEL0.25 (0.002) b0.23 (0.002) b0.015 (0.0017)*
XTCSAL0.25 (0.002) a0.23 (0.002) a0.019 (0.0019)*
XTCSPAL0.23 (0.002) b0.21 (0.002) b0.018 (0.0019)*
XTCSSTEEL0.25 (0.002) a0.23 (0.002) a0.015 (0.0018)*

  • ↵zFor each type of rope, means followed by different letters indicate a difference between rings at P < 0.01. An asterisk following μS – μK values indicates that the static and kinetic friction coefficients are different at P < 0.01. Area refers to rope surface area, which was not measured for all ropes and is only listed in the first ring type for convenience. See Table 1 for rope and ring abbreviations.