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mast help needed #58491
10/06/05 10:29 AM
10/06/05 10:29 AM
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
bullswan Offline OP
Pooh-Bah
bullswan  Offline OP
Pooh-Bah
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
Since the last question I posted about Hull Oxidation proved so sucessful I'm pushing my luck. I've attached two photos to show damage to my mast that I'd like some thoughts from you all with.
The "stripes" cannot be polished off. I've tried lots of stuff. It seems to be a removal of the anodizing if I had to guess (but I don't know much about that honestly). I don't know what caused them either....they came with the boat.
The second photo shows wear/rubbing damage at the tang from the jib halyard block. I don't know what to use to repair the damage and/or some way to prevent the reoccurance. Have any of you run across this and what can be done?

Thanks in advance......

Greg

Attached Files
59026-Nacramast2.jpg (218 downloads)

The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan
-- Have You Seen This? --
Re: mast help needed [Re: bullswan] #58492
10/06/05 10:31 AM
10/06/05 10:31 AM
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
bullswan Offline OP
Pooh-Bah
bullswan  Offline OP
Pooh-Bah
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
Posted picture # 2

Attached Files
59027-Nacramast1.jpg (172 downloads)

The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan
Re: mast help needed [Re: bullswan] #58493
10/06/05 10:48 AM
10/06/05 10:48 AM
Joined: Jul 2001
Posts: 851
US Western Continental Shelf
hobiegary Offline
old hand
hobiegary  Offline
old hand
Joined: Jul 2001
Posts: 851
US Western Continental Shelf
If you add a pigtail (short length of wire) above that block, then the block will locate further forward, away from the mast.

GARY


Santa Monica Bay
Mystere 6.0 "Whisk" <--- R.I.P.
Re: mast help needed [Re: bullswan] #58494
10/06/05 10:51 AM
10/06/05 10:51 AM
Joined: Jul 2005
Posts: 306
St. Louis, MO
hobienick Offline
enthusiast
hobienick  Offline
enthusiast
Joined: Jul 2005
Posts: 306
St. Louis, MO
I'm not sure about removing the stripes. My masts have all be black anodizing and I haven't seen this problem on them.

For the wear under the forstay tang I have used some self adhesive plastic sheet. Usually clear, but whatever I could find laying around the shop at work. I don't know what the material is but is shouldn't really matter. I would think the more important part is how well the adhesive works. I changed mine at the beginning of every season.


Nick

Current Boat
Looking for one

Previous Boats
'84 H16
'82 H18 Magnum
'74 Pearson 30
St. Louis, MO
Re: mast help needed [Re: bullswan] #58495
10/06/05 01:49 PM
10/06/05 01:49 PM
Joined: Feb 2004
Posts: 138
CraigO Offline
member
CraigO  Offline
member
Joined: Feb 2004
Posts: 138
I am not trying to be glib, but fixing that kind of stuff does not make you go any faster.
Aesthetically it looks bad, I will agree, and I would probably try and get some off as well. But in the big scheme, your time would be better spent fairing the hulls, rudders, etc. Also replacing running rigging, lines etc would be more beneficial to getting the boat ready for the water. The rubbing near the tang can be lessoned by using rubber tape around the fittings.
Anyway, good luck with the boat!!

Re: mast help needed [Re: CraigO] #58496
10/06/05 02:06 PM
10/06/05 02:06 PM
Joined: Aug 2005
Posts: 2,921
Michigan
PTP Offline
Carpal Tunnel
PTP  Offline
Carpal Tunnel
Joined: Aug 2005
Posts: 2,921
Michigan
I am going to have to agree with the previous post. Make sure all the hardware parts of the boat are at 100% before spending time on cosmetic stuff concerning the mast. I think the pain of getting rid of those scuff marks is not worth it.

Re: mast help needed [Re: PTP] #58497
10/06/05 02:34 PM
10/06/05 02:34 PM
Joined: Jun 2001
Posts: 833
St. Louis, MO,
Mike Hill Offline
old hand
Mike Hill  Offline
old hand
Joined: Jun 2001
Posts: 833
St. Louis, MO,
If those scuff marks don't come off with Acetone or MEK I wouldn't worry about them. The marks by your forstay can be helped by getting some white or black grip tape that is usually sold to put down on stairs to make them non-slip.

Mike Hill
www.stlouiscats.com


Mike Hill
N20 #1005
Re: mast help needed [Re: Mike Hill] #58498
10/06/05 06:03 PM
10/06/05 06:03 PM
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
bullswan Offline OP
Pooh-Bah
bullswan  Offline OP
Pooh-Bah
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
I appreciate the fact that it might appear that I'm being only fussy but maybe the pictures don't do the situation justice. The block at the top of the jib halyard is actually rubbing a hole in the mast if left to it's own.
Gary's suggestion seems the best fix to me of bringing down the forestay the block. If I try to solve it by tape or such I believe it would simply rub through in no time. I got a PM to say the the block looks turned 180 degrees. That's interesting if true. What do you see?
The other stuff ( the stripes) I agree is cosmetic. I was more curious if anyone else has experienced the same markings and I am stumped as to what caused it.

Thanks
Greg


The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan
Re: mast help needed [Re: bullswan] #58499
10/06/05 06:27 PM
10/06/05 06:27 PM
Joined: May 2003
Posts: 576
BobG Offline
addict
BobG  Offline
addict
Joined: May 2003
Posts: 576
Are'nt those black stripes made from the front mast cradle that has foam or black tape wrapped around it or roller, somone already suggested acetone If not maybe some of the fender mark remover from West Marine........

Re: mast help needed [Re: bullswan] #58500
10/06/05 06:28 PM
10/06/05 06:28 PM
Joined: Jul 2001
Posts: 364
Andrew Offline
enthusiast
Andrew  Offline
enthusiast
Joined: Jul 2001
Posts: 364
Block may be turned only 90 degrees; maybe try a 90-degree shackle? I'm not sure how the Nacra sloops are typically rigged; I haven't studied one, and haven't owned one since I sold my 5.O 4 or 5 years ago.


Andrew Tatton Nacra 20 "Wiggle Stick" #266 Nacra 18 Square #12
Re: mast help needed [Re: bullswan] #58501
10/06/05 06:39 PM
10/06/05 06:39 PM
Joined: Jun 2001
Posts: 12,296
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel
Joined: Jun 2001
Posts: 12,296
South Carolina
This is a REALLY quick and dirty drawing...but if I remember correctly, the forestay should have a pigtale on it for the jib halyard cable block. Adding a small pigtail to it should take care of that problem...but that block looks like it's attached to it's own eye? Can you zoom out on that picture a little?


[Linked Image]

Attached Files
59058-Graphic1.jpg (23 downloads)

Jake Kohl
Re: mast help needed [Re: Jake] #58502
10/06/05 07:46 PM
10/06/05 07:46 PM
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
bullswan Offline OP
Pooh-Bah
bullswan  Offline OP
Pooh-Bah
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
Jake,
When I bought the boat this was how the block was rigged but I went ahead and refitted it with new Shrouds and Forestay as a safety issue. The new forestay came with that pigtail that looks remarkably like your drawing. When it came I didn't know what to do with it since the original had NO PIGTAIL. It makes sense now what you and Gary are saying that I should attach that block to the pigtail and move it away from the mast. Kinda embarassed I didn't see it right off. I'll give that a try. Should I try to fix the indentation the block made already in the mast or forget it? Any thoughts on what I could fill the indentation with?

Thanks
Greg


The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan
Re: mast help needed [Re: bullswan] #58503
10/06/05 08:48 PM
10/06/05 08:48 PM
Joined: Jun 2001
Posts: 12,296
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel
Joined: Jun 2001
Posts: 12,296
South Carolina
There's not really much you could do to repair it - but it should be OK.


Jake Kohl
Re: mast help needed [Re: Jake] #58504
10/06/05 09:29 PM
10/06/05 09:29 PM
Joined: Jun 2001
Posts: 833
St. Louis, MO,
Mike Hill Offline
old hand
Mike Hill  Offline
old hand
Joined: Jun 2001
Posts: 833
St. Louis, MO,
Quote
There's not really much you could do to repair it - but it should be OK.


Jake is right. Not much you can do to repair the damage. I would not worry about it.

The cosmetic streaks on your mast looked like a trailering issue. Like something was rubbing the mast as it went down the road. That's my guess.

Mike Hill


Mike Hill
N20 #1005
Re: mast help needed [Re: Mike Hill] #58505
10/07/05 05:41 AM
10/07/05 05:41 AM
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
bullswan Offline OP
Pooh-Bah
bullswan  Offline OP
Pooh-Bah
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
Sounds good. Thanks guys.

Greg Hill


The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan
Re: mast help needed [Re: bullswan] #58506
10/07/05 05:53 AM
10/07/05 05:53 AM
Joined: May 2003
Posts: 4,451
West coast of Norway
Rolf_Nilsen Offline
Carpal Tunnel
Rolf_Nilsen  Offline
Carpal Tunnel
Joined: May 2003
Posts: 4,451
West coast of Norway
It looks like your issue have been solved, but for information.
When we have had such problems, we have had success with a small alu-plate bent and formed to the mast, taped heavily to the contact-spot. Just replace the alu-plate every two-three years..

Re: mast help needed [Re: Rolf_Nilsen] #58507
10/07/05 06:06 AM
10/07/05 06:06 AM
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
bullswan Offline OP
Pooh-Bah
bullswan  Offline OP
Pooh-Bah
Joined: Mar 2005
Posts: 2,074
Northfield,NH USA
Thanks Rolf. I thought about having my local aluminum welder who did such a great job before on my main beam weld the indentation to fill it up. I think I'll just leave it alone and watch it for signs of a bigger problem. I will be moving the jib halyard block to the pigtail on the forestay TODAY. Enjoy the day in Norway!
Greg


The nice part about being a pessimist is that you are constantly being either proven right or pleasantly surprised. - George Will
"It's not that liberals aren't smart, it's just that so much of what they know isn't so" -Ronald Reagan
Re: mast help needed [Re: bullswan] #58508
10/07/05 06:46 AM
10/07/05 06:46 AM
Joined: Jun 2001
Posts: 12,296
South Carolina
Jake Offline
Carpal Tunnel
Jake  Offline
Carpal Tunnel
Joined: Jun 2001
Posts: 12,296
South Carolina
I wouldn't consider welding on a mast - the bend characteristics are pretty critical and heat treating the aluminum will not bid well for it's fatigue or brittleness.


Jake Kohl
Re: mast help needed [Re: Jake] #58509
10/07/05 07:05 AM
10/07/05 07:05 AM
Joined: Feb 2005
Posts: 1,382
Essex, UK
Jalani Offline
veteran
Jalani  Offline
veteran
Joined: Feb 2005
Posts: 1,382
Essex, UK
Second that Jake. I think I'd probably consider glueing a small ali plate dressed to shape over the damage, just for aesthetics. There are several high performance glues around suitable for use on aluminium - I'm sure that Jimbo could tell you what is available at your local hardware store in the US..


John Alani
___________
Stealth F16s GBR527 and GBR538
Re: mast help needed [Re: Jalani] #58510
10/07/05 08:27 AM
10/07/05 08:27 AM
Joined: Jun 2001
Posts: 778
Houston
carlbohannon Offline
old hand
carlbohannon  Offline
old hand
Joined: Jun 2001
Posts: 778
Houston
If it is just for aesthetics, fill the void with al filled epoxy. Gray JB weld will probably work too. Clean the void with acetone, then clean it again. Fill the void and smooth it with a plastic scrapper. There should only be epoxy in the void. Works on carbon masts too.

This is mainly for Rolf. Instead of using an Al plate to protect the mast you can use centerboard gasket held in place with waterproof duct tape. Layline showed this for a monohull but it works for the Tornado. I used a ~15cm strip of centerboard gasket. I glued it down with contact cement and then taped the edges with waterproof duct tape.

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