mi correggo: stavo leggendo il manuale del silent partner (oggetto analogo e dello stesso produttore) dove la procedura è spiegata meglio; il nodo di backup sono degli anelli di corda da 15 metri fermati all'imbrago da un nodo delel guide o simile (vedi immagine sotto)...un po' macchinoso come sistema!
http://www.greenspun.com/bboard/q-and-a ... _id=001WH2
Pare che il silent partner non richieda nodi di backup
"i ended up using a soloist which i thought was a piece of sheist -- its got a loads of friction at the beginning of each pitch, then once you have some rope out, is self feeding, and pays out slack when you don't want it. back-up knots are a hassle and tying the backups onto my harness, which seemed like the safe way to do it, was a nightmare. i'd say get the silent partner, which i've sinced used also, or just use clove hitches. in my opinion, the soloist isn't worth using. "
Soprattutto c'e' qualcuno che sconsiglia il soloist a favore di un silent partner
"You must not be up with the times. All of the soloing devices made by Rock Exotica are now made by Wren Industries. Check either Climbing or Rock and Ice for the phone number and address. The Silent Partner is the way to go for any soling device. Do not buy or improvise anything else. I have used the former Rock Exotica Soloist device for three years now for solo aid and free climbing. While it was the best device at the time, there are limitations (have to wear full-strength chest harness, does not catch low-angle fall, tends to require rope feeding). I have now used a Silent Partner I purchased from Mountain Tools in Monterey, CA for six months. This device is the bomb! Well worth the money! I use this device for solo free climbing and solo aid climbing. You do not have to wear a chest harness with this device, it will catch a low angle fall, and it does not require self-feeding (with the proper rope).
I have never tried the Solo-aid, but would not use it because it requires self-feeding. Few aid climbs are entirely aid, so you have to do some free climbing between the aid. If you are using the Solo-aid, you must either feed out enough rope for the entire free climbing section (no thank you!) or you must find rests in the free-climbing section where you can hang on at the same time as manually feeding the rope (much easier said then done, especially when you are gripped out of your mind, which you will be when soloing). The Silent Partner works equally well with free and aid climbing and does not require the manually feeding the rope.
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