T.R | Title | User | Personal Name | Date | Lines |
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1527.1 | | THEBUS::THACKERAY | | Thu Jun 07 1990 15:29 | 12 |
| I would have thought that if the boat is that unstable on the stands,
it would have been blown over in the first decent breeze!
Think about it. For a 185 pound man were supported from the top of the
mast, which should be absolutely vertical, then he is going to exert a
force of maybe just a few of those pounds laterally even if he leans
right out over the gunwhales!
Also, if he stays in a line from the mast for'd or astern, then there
is no sideways force at all to "roll" her out of the cradle, eh?
Ray
|
1527.2 | | STEREO::HO | | Thu Jun 07 1990 16:36 | 20 |
| When I had to retrieve a halyard one time on my 3400 lb. lead ballasted
keelboat, my MIT engineering graduate crew suggested that we simply tip
the boat over at the dock. Luckily, the high school graduates among us
saw the ladder on the dock set up for such contingencies and I was
able climb it and free the halyard before before my crew implemented
his plan. In retrospect, I suppose I should have let him try it just
to see the look on his face.
If the stands are snug, and the boat is level, and there are enough
stands. it ought to work. But if you're nervous, why not just wait
until the boat is in the water and do it then. Or just have the yard
crane hoist your volunteer up to the masthead.
Of course, if the boat does tip over, you don't have to worry about the
masthead hitting the ground. The boat will come to rest on its side
with the mast still pointing up at a shallow angle. So your partner
needn't worry about making a mess on the ground. However, it'll be a
wild ride for the 80 or so degrees of arc he'll swing through.
- gene
|
1527.3 | | CLYPPR::EASTLAND | | Thu Jun 07 1990 16:42 | 6 |
|
Thanx for the replies. I'll communicate them. In my partner's words,
"it isn't the physics I'm worried about - I just have this irrationalk
fear". There is no yard crane in fact and at sea on a mooring has to be
a bit more difficult to execute.
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1527.4 | | MSCSSE::BERENS | Alan Berens | Fri Jun 08 1990 00:17 | 19 |
| Going to the masthead at a mooring when it is calm is really no problem
-- I do it a couple of times a year. It is rather fun to watch the
seagulls soaring below you. Of course, if it isn't calm, the poor soul
up the mast does tend to get seasick.
Seriously, going up the mast is not ever safe and should be done
cautiously. Before going aloft, I connect the halyard that will hoist me
to a padeye at the base of the mast and put as much load on the halyard
as I can with a big winch. If that doesn't break it, my weight probably
won't. Use a strong bosun's chair -- many are rather flimsy. Ours was
made by Hood Sailmakers -- very strong, comfortable, and expensive. If
possible, connect a second halyard to your bosun's chair or to the
safety harness you're wearing and keep it taut as you're being hoisted.
If the hoisting halyard does break, you won't fall as far. Another trick
is to connect the second halyard to a padeye at the base of the mast and
tension it. Use a short line from your bosun's chair tied to the second
halyard with a pruissik hitch. This slides with no load and jams
immediately and firmly under load. Just keep sliding the hitch up as you
go up.
|
1527.5 | Life above the spreaders! | YACHTS::CORKUM | I'd rather be sailing.... | Fri Jun 08 1990 09:50 | 26 |
|
Is the concern that the weight of the person at the masthead will cause the
boat to tip over? If so, don't worry it won't happen. It would take alot of
force to pull a heavy boat off it's stands. The boat is safe (and so would be
the one going up the stick) as long as the jack stands are secure (meaning
chained together and snuggly fitted against the hull. Does the boat wobble if
people are walking around on the deck?
A few weeks ago a friend of mine was at the top of his mast when the boat was
on land (on a cradle - similarly supported). This was a Sabre 34 and he was
up there for at least 1/2 hour.
My fear going up the stick is more of heights. Once I get past the spreaders
it becomes a mental challenge. After a bit of time I get comfortable and
actually enjoy the view! A comfortable seat, one that doesn't sqeeze your
thighs together, makes a big difference. Tie a bowline onto the seat as
opposed to relying on a shackle - a recommendation of Dodge Morgan in his
book. Make sure that you have at least one person cranking and another
tailing, don't rely on self-tailing winches when someone's body is on the
other end of the line. Good luck!
Happy Sailing.
bc
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1527.6 | Harness better than a chair | AKOV12::DJOHNSTON | | Fri Jun 08 1990 10:53 | 9 |
| We send guys up the stick a lot while sailing to fine tune the rig
while it is loaded up and occasionally to, ahem, retrieve misbehaving
halyards. Always tie a safety line directly to the eye of the halyard
as well as tape the shackle. A Lirakis harness is more comfortable and
much safer than a traditional bosuns chair. Our foredeck guy is a rock
climber and just uses one of his climbing harnesses. Claims it to be
more comfortable than our Lirakis even.
Dave
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1527.7 | tick, tock, tick, *bang* | ECADSR::FINNERTY | Reach out and luff someone | Fri Jun 08 1990 12:39 | 11 |
|
If you go up while on a mooring it's also a good idea to keep yourself
loosely tethered to the mast. I keep my harness on and keep the strap
around the mast. The last thing you want is to become a human
metronome... maybe it's not necessary, but it improves your feeling
of security a bit. The only drawback is that you need to occasionally
check to ensure that this tether isn't getting fouled on the way up,
and you need to unhook/rehook around the spreaders.
/Jim
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1527.8 | UNNEEDED SECURITY IDEA | CSMET2::GREENWOOD | | Mon Jun 11 1990 12:15 | 6 |
| If you feel insecure, you could always run up the anchor rode on
a halyard (attach the halyard to the middle of the rode) and run
it out and secure each end to something solid. I agree with other
noters about not needing to worry if the jacks are tight and chained
together - a person would have to be way out over the sice to affect
the stability to any degree.
|
1527.9 | | BANZAI::EASTLAND | | Mon Jun 11 1990 13:44 | 8 |
|
Well, with pruissik hitch for backup, we hauled up our cheery volunteer
using the Spinnaker halliard, and very soon our tangled rigging was
straight without mishap. After the volunteer returned to Earth we
allowed him a beer before detailing him to scrape and sand the hull.
Thak you for your comments.
|
1527.10 | Single-handing a Bos'ns chair | WJOUSM::SCHLEGEL | | Thu Jun 14 1990 16:10 | 6 |
| Anybody had any direct experience with three or four part tackle to
haul yourself aloft? My concern is having to go aloft when single-
handing and no one to work the winches. I have seen several references
to this being done satisfactorily with the proper back-up lines, but
would like to hear from someone who has actually done this. What gear
did you use?
|
1527.11 | | STEREO::HO | | Thu Jun 14 1990 19:08 | 26 |
| This is a lot of work. I've done it using mechanical rope grippers
called "Jumar Ascenders" which are used in mountaneering and with three
prussik knots. To use the Jumars, attach a stout line to a halyard,
raise it to the masthead, and cleat it off. It takes two Jumars, one
attached to one foot and a harness, the other one to the other foot.
The second one should be below the first. Push the Jumar attached to
the harness as high as you can, then sit down. Then push the second
Jumar up to the first one. Stand up in the foot stirrup attached to
the second Jumar and push the first one up. Repeat until you're as
high as you need to be.
The prussicks work the same way except I put them around the mast
instead of a line. The third prussik is used to bridge the spreaders.
These two methods allow climbing the mast with one or no lines. To use
multi-part tackles will take lines several times as long as the mast
which is a longer line than most of us have handy.
Doing it alone is unnerving (at least for me) and tiring. Even a weak
person tailing a winch as I shimmy up the mast attached to a halyard is
easier and safer. Anyone can hold a person's body weight with four
turns around the winch. When I get tired I just sit back before
continuing as the tailer holds me up. Of course, it helps to have a
trustworthy tailer and a backup prussik knot.
- gene
|
1527.12 | Steps | MORO::SEYMOUR_DO | MORE WIND! | Thu Jun 14 1990 19:58 | 6 |
| My friend who single-handed from San Diego to New Zealand on a
Vancouver 32 had steps mounted on the outside of the mast which made it
very easy to solo all the way up. Quite safe as I even made the climb
up unassisted.
Don
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1527.13 | Rope Ladder ? | HXOA01::MOWBRAY | from Newfoundland | Fri Jun 15 1990 08:16 | 9 |
| One of the things I had wondered about to get up the mast single
handed is a rope ladder (winter's project). The ladder would be
made fast to the deck on either side of the boom and hauled up on
the main halyard. Once up, a harness built into the top of the
ladder would hold me safe with both hands free.
I have not had to use this (my alternative is called Lloyd) but
on the surface it would seem workable and also could be used at
sea.
|
1527.14 | Twist and SHOUT ! | ESSB::SPENKELINK | Cheer up ! It may not happen ..... | Fri Jun 15 1990 08:47 | 11 |
|
Sounds like a good idea, provided you make one with 3 vertical
ropes to eliminate the ladder suddenly twisting when your half
way up.
The ladder would be very useful too when tied up to a pier in
tidal water like we have here in Ireland (up to 15-20 ft diff
between high and low tide)
Marcel
|
1527.15 | | MFGMEM::KEENAN | PAUL KEENAN DTN 297-7332 | Fri Jun 15 1990 10:27 | 10 |
| I've seen advertisements for a ladder made out of fire hose type
material. The "hose" is sewn to provide foot loops on both sides of
a luff rope. You simply hoist the ladder's luff rope up your mast
groove just like a mainsail. This gives you a ladder that won't wip
around and you can hug the mast when the 3 foot power boat wakes come
rolling along.
I think the catalog was West Marine, but not sure.
Paul
|
1527.16 | A neat idea- bad execution. | OLDTMR::STCLAIR | | Fri Jun 15 1990 14:22 | 18 |
|
Not from personal experience but a good idea that went wrong. I read
of a single hander who did the following.
Step 1. Ran a line from the chair, up the mast, to a drogue.
Step 2. Ran a line from the back of the drogue to the chair so he
could collapse it.
Step 3. Through the drogue over the side and was pulled (almost) to
the top of the mast by the drogue falliong behing the boat.
What happend was the line for collapsing the drogue was too short when he
was almost to the top it tripped the drogue and he desended toward the
deck. Before he could recover the drogue refilled and he went back up
the mast. He said he made several violent passages up and down before
stopping this machine.
|
1527.17 | Single-handing a Bos'ns Chair in Emergencies | WJOUSM::SCHLEGEL | | Fri Jun 15 1990 15:04 | 12 |
| Thank you all for the various inputs. I made a "rat-line" type of rope
ladder a couple of Winters ago, but it was not very successful. As
someone mentioned, it tends to twist when you are part way up unless
the sides flare to several feet or so at the bottom. My wife never
laughed so hard in her life! I spliced "rungs'
for that thing half way through the Winter TV season.
The "Jumar Extenders" seem much more cumbersome than the multi-part
block and tackle. I agree the b. & t. uses a lot of line, but I would have
it specifically for this purpose.
I agree that having to go up single-handed causes some concern, but the
only time I would tend to use it would be when the alternatives were of
greater concern.
|
1527.18 | Gotta do this this weekend | CHRCHL::GERMAIN | | Thu Aug 15 1991 15:13 | 10 |
| If you use multi-part block and tackle, do you have to worry about the
main halyard twisting, thereby twisting the multipart lines and gumming
up the whole works?
Also, if you only had to go up 1/2 way, would you raise the main
halyard up to the point where you needed to go? or would it be better
to raise it all the way and have lots of line for the hoist?
Gregg
|