Graham_Wright
Well-known member
Any information on the merits and demerits of insulating guard rails from their supporting stanchions would be greatly appreciated.
Guard rail insulation
- Thread starter Graham_Wright
- Start date
mainmarine
New member
you can use the inserts used for pushfit plumbing fittings, to stop wear on where they pass through the stanchion.
Vara
Active member
AFAIK from an electrical point of view the only reason to insulate guard lines was in the good old days of RDF to eliminate/reduce quadrantal error. (Didn't make any difference, the only good thing about RDF was that you could listen to the Archers while pretending to navigate).
The little plastic bushes in stanchions are to protect against chafing and therefore a good idea as long as they are a loose fit.
The little plastic bushes in stanchions are to protect against chafing and therefore a good idea as long as they are a loose fit.
Graham_Wright
Well-known member
Thanks. I WAS thinking about the electrical implications.
Does Faraday and his cage enter the argument in electrical storms?
Does Faraday and his cage enter the argument in electrical storms?
Vara
Active member
Don't really know, I suppose in theory if you connected all the guard rails and standing rigging while insulating the mast it would provide some sort of faraday cage.
In a thunder storm the safest place to be is in a car.(bit like the sea sickness cure..........sit under a tree not really practical or helpful).
In a thunder storm the safest place to be is in a car.(bit like the sea sickness cure..........sit under a tree not really practical or helpful).
Salty John
Active member
As long as the mast is grounded the 'cone of protection' or 'Lightning-Protective Zone' afforded by the mast and rig would encompass the guard rails, so no extra benefit from that point of view. You could theoretically make the interior of the boat into a Faraday cage by interconnecting all the peripheral bits of metal, including the guard rails, but I don't know how effective it would be!
bigwow
Well-known member
[ QUOTE ]
In a thunder storm the safest place to be is in a car.
[/ QUOTE ]
Might be a thunder storm this week-end, wonder if the car will fit on the deck?
/forums/images/graemlins/laugh.gif
In a thunder storm the safest place to be is in a car.
[/ QUOTE ]
Might be a thunder storm this week-end, wonder if the car will fit on the deck?
/forums/images/graemlins/laugh.gif
graham
Well-known member
[ QUOTE ]
wonder if the car will fit on the deck?
[/ QUOTE ]
This one would...
wonder if the car will fit on the deck?
[/ QUOTE ]
This one would...
boatmike
Well-known member
There is no way you can turn guard rails or rigging into anything approaching a faraday cage. Forget it!
boatmike
Well-known member
Until a tree falls on you!
Pete7
Well-known member
[ QUOTE ]
AFAIK from an electrical point of view the only reason to insulate guard lines was in the good old days of RDF to eliminate/reduce quadrantal error. (Didn't make any difference, the only good thing about RDF was that you could listen to the Archers while pretending to navigate).
[/ QUOTE ]
Was this the reason that yachts had the last couple of inches of the guard rails secured with thin rope normally at the pushpit? and is it still required ?
Pete
AFAIK from an electrical point of view the only reason to insulate guard lines was in the good old days of RDF to eliminate/reduce quadrantal error. (Didn't make any difference, the only good thing about RDF was that you could listen to the Archers while pretending to navigate).
[/ QUOTE ]
Was this the reason that yachts had the last couple of inches of the guard rails secured with thin rope normally at the pushpit? and is it still required ?
Pete
graham
Well-known member
I think securing the guardwires with lanyards is to allow you to cut them quickly if you need to haul someone back aboard.
VicS
Well-known member
[ QUOTE ]
I think securing the guardwires with lanyards is to allow you to cut them quickly if you need to haul someone back aboard.
[/ QUOTE ] Thats true but it did also introducie a break in the loop that was, we were told, necessary if using RDF
(PS any body know of a use for a Seafix .... proposed as "the most useless piece of marine equipment invented ever", elsewhere on the forums.
I think securing the guardwires with lanyards is to allow you to cut them quickly if you need to haul someone back aboard.
[/ QUOTE ] Thats true but it did also introducie a break in the loop that was, we were told, necessary if using RDF
(PS any body know of a use for a Seafix .... proposed as "the most useless piece of marine equipment invented ever", elsewhere on the forums.
Graham_Wright
Well-known member
[ QUOTE ]
There is no way you can turn guard rails or rigging into anything approaching a faraday cage. Forget it!
[/ QUOTE ]
That's interesting;- I've read just the opposite on many occasions.
Who is right? (I'm not prepared to test either theory!)
There is no way you can turn guard rails or rigging into anything approaching a faraday cage. Forget it!
[/ QUOTE ]
That's interesting;- I've read just the opposite on many occasions.
Who is right? (I'm not prepared to test either theory!)
rogerthebodger
Well-known member
[ QUOTE ]
PS any body know of a use for a Seafix .... proposed as "the most useless piece of marine equipment invented ever", elsewhere on the forums.
[/ QUOTE ]
Man over board locator. Using a VHF radio microphone transmitter potted in a small plastic box attached to the MOB.
PS any body know of a use for a Seafix .... proposed as "the most useless piece of marine equipment invented ever", elsewhere on the forums.
[/ QUOTE ]
Man over board locator. Using a VHF radio microphone transmitter potted in a small plastic box attached to the MOB.
Vara
Active member
Can't see that you'd have a problem with that, just have to move the hot tub and the croquet hoops. /forums/images/graemlins/smile.gif
steve_cronin
N/A
Nice little compass though innit?
Steve Cronin
Steve Cronin
charles_reed
Active member
But mainly
to be able to tighten the guard rail.
to be able to tighten the guard rail.
VicS
Well-known member
[ QUOTE ]
Man over board locator. Using a VHF radio microphone transmitter
[/ QUOTE ] Nice idea but Seafix covers 200 - 400 kHz, hardly VHF. Radio mikes work at around 174MHz or even UHF. I suppose it would not be impossible to build a transmitter to work within that frequency range though. Since the Seafix can detect an unmodulated signal modulation would not even be necessary. Trouble is the MOB might have to take a big aerial mast with him!
Man over board locator. Using a VHF radio microphone transmitter
[/ QUOTE ] Nice idea but Seafix covers 200 - 400 kHz, hardly VHF. Radio mikes work at around 174MHz or even UHF. I suppose it would not be impossible to build a transmitter to work within that frequency range though. Since the Seafix can detect an unmodulated signal modulation would not even be necessary. Trouble is the MOB might have to take a big aerial mast with him!
VicS
Well-known member
[ QUOTE ]
Nice little compass though innit?
[/ QUOTE ] It is, and it used to be possible to get a handle to fit to convert them into hand bearing compasses. At least it was for the earlir ones which had a Sestrel compass. I've got a handle for a Sestrel but sadly the later type of compass.
Nice little compass though innit?
[/ QUOTE ] It is, and it used to be possible to get a handle to fit to convert them into hand bearing compasses. At least it was for the earlir ones which had a Sestrel compass. I've got a handle for a Sestrel but sadly the later type of compass.
