Knife recommendation
- Thread starter Stemar
- Start date
onesea
Well-Known Member
xyachtdave
Well-Known Member
Iliade
Well-Known Member
Shouldn't a gentleman and his sword be inseparable?
Sailingsaves
Well-Known Member
You'd need to talk to this chap
http://www.youtube.com/channel/UCZmNLwHKqOXvnkXBp1DjWcw
But seriously, even though not concise, he sure knows how to sharpen a knife:
http://www.youtube.com/watch?v=aYgZW2rEuMk
LittleSister
Well-Known Member
If it ever arrives ! (Judging by previous threads on that company.)
William_H
Well-Known Member
I am not a fan of knives for anything on boats. I can't remember when I last wanted to cut a rope or strap. In any case things like hacksaw or secateurs are far better for modern ropes. For thos who want a safety knife ina lifejacket then then hooked type with an inside edge would be best. I do have a sheathed knife mounted inside the cabin. Not for use but just to meet requirements for safety gear.
I have a diving knife I found in the water. I cut the tip off it so that it has something like a chisel instead of a point. Wonderful for barnacles and mussels. My weapon of choice. I don't know what Mr Plod wold make of a wicked knife witha wide flat tip.
Anyway back to degausing the existing knife. Yes you need AC feed to a coil. An old electric drill with armature removed would be one option. Connect the brushes together so all current goes through fieled coil but via a 100 watt lamp. To limit current. Another option might be to wind a coil big enough for the knife to go into that is run on a transformer. Note here transformer, not a transformer recifier power supply type thing. Perhaps even an old battery charger, coil connected before the diodes.
The principal is that the knife will be magnetised in opposite directions at 50 times per second. If you switch off the AC supply this could be at either a +ve or -ve part of cycle so leaving knife magnetised one way or the other or not much at all. What you do after a seconds ac fied application is to remove the knife (not too fast) to a place welll away from the coil. Then shut off the AC power. The magnetism of the knife will be switched from N to S rapidly but diminishing as you take it away until it is near 0.
It might be worth just laying the knife on the core of any large transformer type device that is operating. Generally the magnetic field is well contained in the iron but there may be enough floating around to demagnetise. Again take it away slowly with transformer still powered then check for magnetism.
Don't let your phone of watch or almost any electronic gadget near the coil as so many things rely on a magnetic field now and they will be zonked.
Just be very careful of the AC wiring unless it is low voltage. good luck olewill
I have a diving knife I found in the water. I cut the tip off it so that it has something like a chisel instead of a point. Wonderful for barnacles and mussels. My weapon of choice. I don't know what Mr Plod wold make of a wicked knife witha wide flat tip.
Anyway back to degausing the existing knife. Yes you need AC feed to a coil. An old electric drill with armature removed would be one option. Connect the brushes together so all current goes through fieled coil but via a 100 watt lamp. To limit current. Another option might be to wind a coil big enough for the knife to go into that is run on a transformer. Note here transformer, not a transformer recifier power supply type thing. Perhaps even an old battery charger, coil connected before the diodes.
The principal is that the knife will be magnetised in opposite directions at 50 times per second. If you switch off the AC supply this could be at either a +ve or -ve part of cycle so leaving knife magnetised one way or the other or not much at all. What you do after a seconds ac fied application is to remove the knife (not too fast) to a place welll away from the coil. Then shut off the AC power. The magnetism of the knife will be switched from N to S rapidly but diminishing as you take it away until it is near 0.
It might be worth just laying the knife on the core of any large transformer type device that is operating. Generally the magnetic field is well contained in the iron but there may be enough floating around to demagnetise. Again take it away slowly with transformer still powered then check for magnetism.
Don't let your phone of watch or almost any electronic gadget near the coil as so many things rely on a magnetic field now and they will be zonked.
Just be very careful of the AC wiring unless it is low voltage. good luck olewill
Sailingsaves
Well-Known Member
Ah ha. They are the bad one then.
It seems such a pity for the other company with the similar name.
That is, obviously I have forgotten which is the good company out of the two with similar names. Perhaps the good company should change their name to "THE ACTUAL MEGA...." whatever the rest of their name is.
Ref knifes on board and William_H.
The knife in my photo top left, has no way of stabbing or even cutting anything unless the object to be cut is slid in one of grooves either side - trouble is will only cut 13mm max.
Won't cut an anchor line for example or even a mooring line.
Therefore my second choice is the green handled fixed blade ; has blunt tip in same manner as you cut tip off your knife, serrated and a 'normal' sharp side and comes in a plastic sheath that has a lock on it AND is a bright colour so easy to find.
After one chap drowned under a catamaran trampoline for lack of a knife and another survived (on different occasion, but again under a trampoline) because he had a knife and cut his way out I would say a sailor should always have a knife ON them and also the correct types of knife at every winch. The safety knifes with no exposed blade would cut most sheets, but would not cut a riding turn ON the winch, that would need an exposed blade. Like boat designs, no one knife will do all jobs.
All crew must be trusted; I have taught my children to respect all tools / weapons (anything - including a ballpoint pen - only becomes a weapon when the person decides to use it as such). We use for fun and only on targets and only after safety lessons - crossbows, recurve bows, compound bows, throwing knives, shot guns, air rifles, pistols, etc.
It is great for learning a skill, self discipline, stamina to keep practising, using common sense, having fun, and the knowledge is there if our castle is ever stormed at 02:00 hours.
Trouble is my son is getting to be a better shot than I am and I used to be one of the best - but actually that is the way it should be, children should learn from their parents and be better than their parents I think. So I am happy.
I wouldn't sail on a boat with commando daggers at every winch if I was sailing with strangers though ! Or at least I wouldn't get a wink of sleep whilst off watch.
Sailingsaves
Well-Known Member
Out of interest, if you attempt to de-magnetise, would you let us know which method you use and if it works and how much effort it took, please?
Just remembered, to magnetise something, say a nail, just 'stroke' it from one end to the other with a magnet a few times; aligns the dipoles again, so turns it into a magnet. Would stroking your german blade in random directions with any old manget mess up the alignment and therefore the magetism?
Interesting article here:
http://www.ndt.net/article/nde-india2006/files/tp-27-pap.pdf
Slowtack
Well-Known Member
Y'all need to consider a Buck knife for a fine cuttin' edge in this life and gettin' a start on bonus points for the afterlife!
http://www.buckknives.com/index.cfm?event=why.message
http://www.buckknives.com/index.cfm?event=why.message
Sailingsaves
Well-Known Member
BUMMER !
That means this handy little thing (I paid under £10 for it) is illegal in public and it is so handy for little jobs.
http://www.gerber-store.co.uk/knives-c1/gerber-gdc-zip-blade-folding-knife-p178
Blade is like 10mm long, but LOCKS.
LittleSister
Well-Known Member
Neil
Well-Known Member
Quote Originally Posted by WoodyP View Post
The Law relating to knives is here.
https://www.gov.uk/find-out-if-i-can...-carry-a-knife
Well, my understanding is that if you're carrying to the boat, then that's allowed. Just don't go club crawling with teenagers of a Saturday night.
Ever since I nearly chopped my fingers off when trying to pierce some plastic with a folding swiss army knife that folded unexpectedly, I've favoured locking folders. While such laws follow a similar pattern in Ireland, there's not such a draconian flavour to them.
These laws make me laugh. We have a continuing spate of drug gang-related shootings and murders. Why not ban handguns instead of knives? Oh... wait a minute, they are banned aren't they?
When I was a lad in the UK and a keen boy scout, we regularly carried a sheath knife on our belts in public. Nobody got stabbed and no one got thrown into goal.
In any event, my recommendation would be the Spyderco Pacific Salt. H1-steel completely impervious to salt water corrosion, very sharp and holds a good edge and comes in a emergency-yellow, but it locks, so keep it in your oilies' pocket at all times.
The Law relating to knives is here.
https://www.gov.uk/find-out-if-i-can...-carry-a-knife
Well, my understanding is that if you're carrying to the boat, then that's allowed. Just don't go club crawling with teenagers of a Saturday night.
Ever since I nearly chopped my fingers off when trying to pierce some plastic with a folding swiss army knife that folded unexpectedly, I've favoured locking folders. While such laws follow a similar pattern in Ireland, there's not such a draconian flavour to them.
These laws make me laugh. We have a continuing spate of drug gang-related shootings and murders. Why not ban handguns instead of knives? Oh... wait a minute, they are banned aren't they?
When I was a lad in the UK and a keen boy scout, we regularly carried a sheath knife on our belts in public. Nobody got stabbed and no one got thrown into goal.
In any event, my recommendation would be the Spyderco Pacific Salt. H1-steel completely impervious to salt water corrosion, very sharp and holds a good edge and comes in a emergency-yellow, but it locks, so keep it in your oilies' pocket at all times.
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Hypocacculus
Well-Known Member
Watchmakers have a demagnetiser to demagnetise their tools. Of course it's quite difficult to find a real watchmaker these days. However, most Rolex dealers have a workshop so you could try asking nicely.