New Posts New Posts RSS Feed: World Sailing Report on Bora Gulari Accident
  FAQ FAQ  Forum Search   Register Register  Login Login

World Sailing Report on Bora Gulari Accident

 Post Reply Post Reply Page  <123
Author
Oatsandbeans View Drop Down
Far too distracted from work
Far too distracted from work


Joined: 19 Sep 05
Location: United Kingdom
Online Status: Offline
Posts: 229
Post Options Post Options   Quote Oatsandbeans Quote  Post ReplyReply Direct Link To This Post Posted: 24 Nov 17 at 1:38pm
It always made me cringe seeing sailors wrap ropes around my hands. I have never done it. I get a better grip on a rope by passing it over my thumb when it has come out the top of my hand and then it goes back into the hand. If you want to ease it you just ease your grip and it slowly runs over thumb. In an extreme situation like bora's letting the rope off your hand is still easy and quick.
Back to Top
JohnJack View Drop Down
Far too distracted from work
Far too distracted from work


Joined: 12 Mar 13
Online Status: Offline
Posts: 235
Post Options Post Options   Quote JohnJack Quote  Post ReplyReply Direct Link To This Post Posted: 27 Nov 17 at 9:48am
From the report, it sounds like the amputation of his fingers was caused by the sheet first gripping then the sudden jerk as the sheet tightens against the helmsman momentum whilst exiting the boat during the pitch pole. Same mechanism as the long drop (though a hangman's skill was in only allowing the offender to drop enough to allow dislocation of the neck and not ripping the head off). I never understood the need for super skinny sheets, though I have really poor grip in my hands anyway and struggle with anything less than 8-10mm if it has any serious load on it. If I find it doesn't run free enough, I just substitute with bigger blocks. the extra few grams in weight is not going to make that much difference overall. However not sure if the Nacra is a total one design where this isn't a possibility (in which case it may need a review) or is this just put down to being a freak accident with an "allowable" minute possibility of reaccurence.
Back to Top
mozzy View Drop Down
Really should get out more
Really should get out more


Joined: 16 Feb 12
Location: United Kingdom
Online Status: Offline
Posts: 515
Post Options Post Options   Quote mozzy Quote  Post ReplyReply Direct Link To This Post Posted: 27 Nov 17 at 10:19am
Control lines I find adding extra diameter really adds resistance, so it end up being just as tough on your hands, and tougher on your muscles, and then doesn't release as well. You can obviously go up in sheave diameter, but it's not always possible on control lines. 

With sheets you can always use larger blocks and with tapered sheets it should run smooth. I do find over 8mm the sheets gets quite heavy and harder to work with in the boat.
Back to Top
Sam.Spoons View Drop Down
Really should get out more
Really should get out more


Joined: 07 Mar 12
Location: Manchester UK
Online Status: Offline
Posts: 1309
Post Options Post Options   Quote Sam.Spoons Quote  Post ReplyReply Direct Link To This Post Posted: 27 Nov 17 at 11:00am
From what I can gather it was the traveller line rather than the sheet that did the damage JJ.

Bigger blocks will reduce friction as will fewer blocks or thinner rope. I guess finding a compromise is the key. Spice has a 6:1 centre mainsheet but still has pretty high sheet loads, Blaze (and now Supernova) has a 2:1 transom mainsheet led along the boom via a ratchet on the kicker take off to the hand. Much lower sheet loads with only three blocks in the system, but I do seem to be pulling a fair bit of mainsheet between running and upwind. I suppose a couple of the extra purchases on the Spice go to overcoming the extra friction  Ouch 

Perhaps I'll measure the amount of sheet pulled next time I rig each of the boats.....
Spice 346 "Flat Broke"
Blaze 671 "supersonic soap dish"
Supernova 395 "dolly the sheep" (now sold but still undecided as to her replacement)
Back to Top
 Post Reply Post Reply Page  <123

Forum Jump Forum Permissions View Drop Down

Bulletin Board Software by Web Wiz Forums® version 9.665y
Copyright ©2001-2010 Web Wiz