Inclining Suggestions?
Situ: 6T full keel ketch with fouled or damaged mizzen halyard sheave,
air draft of main 50', same of mizzen approx 40'. I wish to incline her alongside a high pier, for obvious reasons. I have done this with a smaller sloop using a convenient mainmast halyard, but feel in this situ that risks jamming another halyard (pulling it hard athwartships off its sheave & creating 2 problems instead of solving one). There is no spinnaker or other external-blocked halyard suitable for this. If anyone has done this (only if you have, please!), I could use a proven/practical rigging suggestion. FWIW going aloft on the mizzen isn't an option view only a light topping lift is available there. Frank |
In Jere Lull writes:
In article .com, wrote: Situ: 6T full keel ketch with fouled or damaged mizzen halyard sheave, air draft of main 50', same of mizzen approx 40'. I wish to incline her alongside a high pier, for obvious reasons. I have done this with a smaller sloop using a convenient mainmast halyard, but feel in this situ that risks jamming another halyard (pulling it hard athwartships off its sheave & creating 2 problems instead of solving one). There is no spinnaker or other external-blocked halyard suitable for this. If anyone has done this (only if you have, please!), I could use a proven/practical rigging suggestion. FWIW going aloft on the mizzen isn't an option view only a light topping lift is available there. Frank Dock mates used a household ladder to get up their mast. If there is a topping lift in the mast, why not use this one to pull a stronger hallyar/rope in the place of the topping lift and then go to the top of the mast? - Lauri Tarkkonen |
Lauri Tarkkonen wrote:
If there is a topping lift in the mast, why not use this one to pull a stronger hallyar/rope in the place of the topping lift and then go to the top of the mast? It's sheave isn't large enough to reave a sufficiently stronger line (at least, if *I* am going take the chair at 150 lbs human live load, and we have no 50 lb lad who is skilled). It's the first thing I thought of. ISTM a strategy is needed for rigging a line around the mainmast near its top to shore, or other suitable means for safely inclining her about 25 deg with minimal force for 1/2 hour or so, short of securing massive deck ballast. I'm sure this problem's been solved in a half-dozen ways for a few thousand years... |
wrote:
Lauri Tarkkonen wrote: If there is a topping lift in the mast, why not use this one to pull a stronger hallyar/rope in the place of the topping lift and then go to the top of the mast? It's sheave isn't large enough to reave a sufficiently stronger line (at least, if *I* am going take the chair at 150 lbs human live load, and we have no 50 lb lad who is skilled). It's the first thing I thought of. ISTM a strategy is needed for rigging a line around the mainmast near its top to shore, or other suitable means for safely inclining her about 25 deg with minimal force for 1/2 hour or so, short of securing massive deck ballast. I'm sure this problem's been solved in a half-dozen ways for a few thousand years... http://www.neropes.com/techdata/v12.htm Vectran V12 5mm Tensile strength 4750 lbs Derate 15% then apply factor of safety of 15 (reccomended for lifelines) and you get 269 lbs safe working load assuming you can cleat it without damaging it and secure it to your harness without using a known to be weak knot. Even if you loose 40% of the strength in securing it if you haven't 'underestimated' your weight you have about 10 lbs in hand for clothing, tools etc. Watch out, its fairly slippery and *will* slip on a cleat if you treat it like a normal rope. Figure on needing about twice the turns for it to grip compaired to a polyester rope. I'd trust an anchor bend with the tail seized to the standing part to attach it to the harness or bosun's chair. Anyone handling the tail for you should be wearing kevlar gloves. I'd also rolling hitch a safety line round the mast and push it up as you go. As to your other idea, If you still want to heel her, Why not go up the main mast and tie a sling securely round it with a substantial block on it and a line through that block with a clear lead down to your anchor windlass and also out to the quay? -- Ian Malcolm. London, ENGLAND. (NEWSGROUP REPLY PREFERRED) ianm[at]the[dash]malcolms[dot]freeserve[dot]co[dot]uk [at]=@, [dash]=- & [dot]=. *Warning* HTML & 32K emails -- NUL: 'Stingo' Albacore #1554 - 15' Early 60's, Uffa Fox designed, All varnished hot moulded wooden racing dinghy. |
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Ian Malcolm wrote:
Vectran V12 5mm Tensile strength 4750 lbs Thank you for the pointer toward & brief education about hi-tech ropes! NE Rope is only 3 hrs away & there are 2 distributors right on our waterfront. As to your other idea, If you still want to heel her, Why not go up the main mast and tie a sling securely round it with a substantial block on it and a line through that block with a clear lead down to your anchor windlass and also out to the quay? I had been trying to think of a way to sling the main high without going up & already have the sling & snatchblock. If I have to go up the main to do it, I may as well forget that & go aloft the mizzen with adequate rope, & be done with it. My only other idea was that she's berthed at a bulk cargo terminal where there are cranes & a man lift, maybe a bottle of booze in the right direction...evil look... LL/whack forehead dep't: it's an item that got overlooked by both surveyor & buyer/owner during the transaction; had it been checked, the seller would've been responsible for it before she left the yard, or adjustment would've been made at closing. During the brief survey sea trial, only main & heads'l were flown due inclement weather. Surveyor has 48 yrs experience & found everything else imagineable. (not my boat) Frank |
Terry Spragg wrote:
(excellent input & reminders snipped) You should be prepared to do all this at sea in heavy weather, anyway. You could need it someday. I'm not 20 & enroute to Bermuda in a lagging academy race with a snapped headstay anymore. I am a chicken now & not sure if I've kept a short enough account with God. :-) Next time, you should have a spare halyard rigged, damn the extra weight, you want to fly a fisherman anyway, right? Ya think? Nottamybote - close friend's new buy. But he's a professional ropechoker (deckie) & I'm sure he'll come around to such things...sort of funny that as an engr I hung extra halyards on my own the first week I had her, go figureg. Extra weight etc. no issue, big heavy motorsailer. But some mods to masthead(s) needed to hang anything else. Seems Fischer felt she'd only ever need minimum running rigging (but robust). Why not unstep the mast, using the main halyard to lower it? Lots of interference at the stern to remove for a low enough DIY routine to reach things w/o the same basic problems as inclining her. Besides we are basically lazy. ;-) The manlift & a friendly bribe is sounding better by the minute... Much thx, Frank Chicken |
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