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Vertical Spools

A vertical spool is a device where the rope follows a helical path and the axis of the helix is vertical. There are a number of other devices that also fit this description (various carabiner wraps and certain hooks come to mind), so I rather arbitrarily decided that if the diameter of the helix was 20 mm. or more, the device would be discussed here. I also included the Miller descenders because of their similarity to the Sky Genie and Frost Rope Rider (not to be confused with the Forrest Rope Riders, which are horizontal spools).

Some large-diameter (say, 8 to 10 rope diameters) vertical spools can provide smooth control that is similar to the horizontal spools, but they contribute more rope twisting without providing any compensatory benefit. Others are simply horrid. The small-diameter spools function more like Patten's Hook, and can cause severe spinning under adverse conditions.

Gallery

Image ID Device Description Acquired Weight Height Width Thickness Std. volume
Capewell Descender 3085 Capewell Descender
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Al, vertical rod /w V slot, spring loaded slot engager, sheet metal cover tube /w abrasive grip Shannon Gardiner, 2021 734 283 64 59 1061
Don Mulholland 421 Don Mulholland Galvanized pipe, top & bottom guide rods, side rope guides Don Shofstall, 1990 880 190 83 56 883
Elk River 1119 Elk River Descendor™ Forged Al rod /w end eyes, sheet metal cover tube Franklin T Finley, 2007 701 240 24 24 137
Forrest Escape Line 417 Forrest Escape Line Al spool, slotted end plates, eye bolt, for 4 mm. Kevlar cord, emergency use only John E. Weinel, Inc., 1985 264 118 64 52 393
Frost Rope Rider I 558 Frost Rope Rider I
Al, vertical rod /w V slot, spring loaded slot engager, cover tube /w knurled grip, for 8 mm. rope. International Safety Equipment, 1999 258 178 43 42 321
Frost Rope Rider II 429 Frost Rope Rider II
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Al, vertical rod /w V slot, spring loaded slot engager, sheet metal cover tube /w abrasive grip John E. Weinel, Inc., 1992 743 248 59 57 834
H. K. 1414 H. K. Steel rod /w rope grooves & end eyes, two cut eyebolt horns, sheet metal cover tube Álvaro Gomes da Fonseca, 2014 1325 209 120 48 1208
Miller Descent Device (Large) 466 Miller Descent Device (Large) Forged Al rod /w rope grooves & end eyes (one /w horn), sheet metal cover tube Safety Supply, 1991 771 263 82 60 1294
Miller Descent Device (Small) 465 Miller Descent Device (Small) Forged Al rod /w rope grooves & end eyes (one /w horn), sheet metal cover tube Rob Beightol, 1991 508 224 71 52 827
Mio Mechanical MIO-D 1067 Mio Mechanical MIO-D Forged Al rod /w end discs, lever actuated brake cam, overspeed control, sheet metal cover tube, clevis eye CWC Supply, 2007 1998 305 151 87 3996
Mio Mechanical MIO-D2 1056 Mio Mechanical MIO-D2 Forged Al rod /w end discs, lever actuated brake cam, sheet metal cover tube, clevis eye CWC Supply, 2007 1230 216 147 98 3123
Sky Genie 930 Sky Genie Forged Al rod /w end eyes, sheet metal cover tube Peter La Plante, 2003 358 225 53 52 621
Sky Genie 14G-0 3086 Sky Genie 14G-0 Forged Al rod /w end eyes, sheet metal cover tube, rope sling /w 2 snap hooks John David, 2021 556 247 62 70 1066
Sky Genie DT2 3002 Sky Genie DT2 Forged Al rod /w end eyes, sheet metal cover tube Planet Surplus, 2021 431 229 59 48 647
Sky Genie Model DT2&3 467
1236
1312
Sky Genie Model DT2&3 Forged Al rod /w end eyes, sheet metal cover tube
  • John E. Weinel, Inc., 1989
  • Bob Elron, 2009
  • Michael Jakub, 2012
555 246 66 62 1007
Spiral Brake 426 Spiral Brake Galv. pipe /w steel carabiners bolted to each end Gary Storrick, 1991 1387 360 70 70 1764
Storrick Rappel-e-stein, Version A 425 Storrick Rappelestein, Version A Al tube, carabiner welded to side, welded bottom Robert W. Storrick, 1979 948 150 140 89 1869
Storrick Rappel-e-stein, Version B 3067 Storrick Rappelestein, Version B Al tube, carabiner welded to side, welded bottom Gary Storrick & Amy Skowronski, 2021 738 154 148 89 2018
Capewell Descender, Version A 1433 Capewell Descender
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Al, vertical rod /w V slot, spring loaded slot engager, sheet metal cover tube /w abrasive grip Recyclingit Inc, 2015 742 283 57 53 852
Tech Safety Lines RopeRider 3078 Tech Safety Lines RopeRider
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Al, vertical rod /w V slot, spring loaded slot engager, sheet metal cover tube /w abrasive grip Michael Record, 2021 732 283 60 59 992
Vertical Spool 428 Vertical Spool
Galv. pipe /w two welded guide bollards Gary Storrick, 1991 1298 254 87 64 1414

Brake Tubes Vertical Spools Spool Weight Chart