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发表于 2005-3-2 09:35
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MH请看,TR solo的条件没有上边的thebikezone的文章中所用的那么苛刻。我问了USHBA的Serguei,这里贴上他激情万分的回答以及我和Richard的讨论: 
 
1. From Serguei the Ushba seller: 
"........."So, look at this "A guide to self belay and fall arrest techniques..." 
careful again. One thing only shows that this review is just a dirty 
advertising article but not a honest independent review. 
 
First question: How the device witch is just a poor copy of USHBA Basic 
became the best in the test and a similar USHBA's is the worst? Look at the 
Troll Rocker and USHBA. You see the USHBA has a "U"-groove on the cams at 
both ends so that the rope isn't cut, but the Troll has flat simple cams. If 
the devices have a similar designs what of them will cut the rope first 
under superior load? 
 
 
 
After that I'm sure they didn't make any taste at all !!! Why? See it: 
 
 
 
"In tests for Lyon Equipment this device severed the rope each time its 
ability to catch a fall was tested..." 
 
 
Just because the USHBA's Basic will be broken first before rope damage!!! 
And it is impossible to cut many ropes by one device. Ural-Alp's crash test 
show that the pin with fix a small came will be broken first by the load min 
530kg (it is far exceeds UIAA and CE requirements). After that, even with 
such damage the USHBA's will catch the rope well and only now if increase 
the load it will be the question how the rope is strong.........." 
 
2. Richard的评论 
 
I didn't mention the "U" grooves but the USHBA devices do have those.  I 
have no idea who copied who but the main factor affecting pinching of the 
rope may be the orientation of the device.  They all rotate some amount when 
weighted.  I really love the roller in the USHBA that allows you to jug up 
the rope.  The Rocker does not have this.  It's good to see the Russians 
defending their product as it shows me their pride in quality.  Just follow 
the rules I mentioned in my last E-mail and you will be fine.  Another 
unrelated but big worry is rope abrasion over an edge.  I almost cut through 
one rope jugging up with a heavy pack....I had backup.  The caver's Bible, 
now a little old, "On Rope" covers this.  Dynamic ropes actually wear worse 
due to their stretch and given the same edge, wear will be different 
depending on how much rope is hanging before the load.  I can get you more 
info on this if you're interested.  I think you made the right choice. RG |   
 
 
 
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