mast seperating a little while rigging???

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HAIL
HAIL
SA
1160 posts
SA, 1160 posts
11 Feb 2008 8:46pm
hey guys, just quickly. i have been noticing latey that when i rig my sail my 400 mast seems to come apart about a inch??? it stays like it for the hole time im out. im just worried that it might make it less strong and more prone to snapping?? why does this happen and how can i fix it!!! cheers, chris.
russh
russh
SA
3027 posts
SA, 3027 posts
11 Feb 2008 8:51pm
Got a mate who used to use a bit of duct tape around the joint when he put it ogether - seemed to work

Don't know if he still does - I usually find that my sails rig unusually and de rig and fix it - running your hand along the luff before you down haul is worth a try.


Off the subject
You gonna get some wind on KI tomorrow and Weds or what - where do you sail on a sse'r

Russh
nebbian
nebbian
WA
6277 posts
WA, 6277 posts
11 Feb 2008 7:24pm
Put a roll of electrical tape in the pocket of your mast bag.

A quick wrap over the join later and two things happen:

1) The mast doesn't separate when putting it into the sail.
2) Sand doesn't get into the join and stick the mast together.

'Tis a good thing
WINDY MILLER
WINDY MILLER
WA
3183 posts
WA, 3183 posts
11 Feb 2008 7:26pm
is it a powerex??

mines as loose as a goose.

go the duct tape, this will also prevent sand entering join and glueing both sections aswell as keepin em together whilst riggin.

i stick the tape back on mast to remind me to use it.

also be carefully when adjusting mast extension with sail still on.


yes, it will snap and you wont get any warranty.

mathew
mathew
QLD
2172 posts
QLD, 2172 posts
11 Feb 2008 8:27pm
Dont ever let the ferrule come apart, even a little bit... you will create a point-loading as the contact point wont be a 100% fit. The tape thing is the way to go; also helps avoid leaving the top half in the sail when you de-rig.
Pugwash
Pugwash
WA
7733 posts
WA, 7733 posts
11 Feb 2008 7:29pm
I tape my masts at the join every time I sail...

I would be VERY worried about snapping due to the mast separating, particularly when has separated by an INCH!!!
easty
easty
TAS
2213 posts
TAS, 2213 posts
11 Feb 2008 10:03pm
Doesn't downhauling the sail pull the masts back together? Obviously not, or this topic wouldn't exist.
snides8
snides8
WA
1731 posts
WA, 1731 posts
11 Feb 2008 11:07pm
as Matthew said the mast MUST!!!! be completely connected if you don't then there is a great chance of this happening
use tape like Nebbs has mentioned if the fit is loose.
down hauling wont make the halves meet as the tension is off center with the mast
and the mast will bind up on 2 points.
ka43
ka43
NSW
3105 posts
NSW, 3105 posts
12 Feb 2008 10:31am
One time I didnt tape two halves together the mast broke at the ferrule. It was only a couple of cm's but in a hurry to get out I didnt take the time. Result= one stuffed mast.
Get a cheap roll of duct tape from a $2 shop and use it EVERY time. That extra 30 seconds will save you every time.
MikeyS
MikeyS
VIC
1509 posts
VIC, 1509 posts
12 Feb 2008 10:52am
easty said...

Doesn't downhauling the sail pull the masts back together? Obviously not, or this topic wouldn't exist.


Downhauling actually stops the mast halves from slotting back together, as it puts more curve in the mast and more pressure on points of contact of the inside and outside walls.

But you knew that already
Herbylyn
Herbylyn
QLD
214 posts
QLD, 214 posts
12 Feb 2008 10:22am
Nebbian said
Put a roll of electrical tape in the pocket of your mast bag.

A quick wrap over the join later and two things happen:

1) The mast doesn't separate when putting it into the sail.
2) Sand doesn't get into the join and stick the mast together.

'Tis a good thing

No 3... It makes it easier to get mast out when derigging
latedropeddy
latedropeddy
VIC
417 posts
VIC, 417 posts
12 Feb 2008 1:29pm
taping the join also helps if you have to derig in the water after an equipment failure.
Poida
Poida
WA
1922 posts
WA, 1922 posts
12 Feb 2008 11:54am
i've had two masts break, and I suspected the two parts werent together properly. the masts broke on the outside gybe after a bit a creaking. so i always check after the sail is rigged and downhauled if the mast pieces are together.
Wet Willy
Wet Willy
TAS
2317 posts
TAS, 2317 posts
12 Feb 2008 5:19pm
easty said...

Doesn't downhauling the sail pull the masts back together? Obviously not, or this topic wouldn't exist.


Some masts are so precisely engineered that the join is airtight, and when you slide the halves together, there's air pressure inside which pushes them apart a few cm. But if you hold them tight for a few seconds the air will find a way out, and the halves will stay together. I found this with my new X3.

In case you didn't get it by now, DO NOT SAIL IF THE MAST HALVES ARE NOT FITTING SNUGLY TOGETHER.

HAIL
HAIL
SA
1160 posts
SA, 1160 posts
12 Feb 2008 11:36pm
russh said...




Off the subject
You gonna get some wind on KI tomorrow and Weds or what - where do you sail on a sse'r

Russh


oh yea mate just been out now....was a good 23 knots!!! south south east. we sail just infront of the yacht club in kingscote mainly. nice grass rigging. why do you ask??


any how! i kinda get the message now!! thanks a million guys. looks like i have been a very very very lucky boy!! because its been happening for a while and im usually to keen to sail to take much notice. thanks for your help!




easty
easty
TAS
2213 posts
TAS, 2213 posts
13 Feb 2008 1:03am
Wet Willy said...

easty said...

Doesn't downhauling the sail pull the masts back together? Obviously not, or this topic wouldn't exist.


Some masts are so precisely engineered that the join is airtight, and when you slide the halves together, there's air pressure inside which pushes them apart a few cm. But if you hold them tight for a few seconds the air will find a way out, and the halves will stay together.


Thanks for the explanation Wet Willy in overseas lands. I guess I've never had a mast engineered precisely enough, as I've never noticed them not joining together and staying together. A bonus of buying cheap stuff no doubt. But seriously I've had the same North Sting 430 for 6 years, used it consistently, and never noticed this happening. Bought a 400 sdm a couple of years ago which has had a fair workout and same story. Mind you I've never checked the join once I've rigged the sail, maybe I just don't go hard enough to break them.
aus005
aus005
TAS
514 posts
TAS, 514 posts
13 Feb 2008 1:15am
hey guys
it is imperative that you tape the joint if you dont believe come and check out my collection of carbon tubes split at the joint.
you may be lucky enough to get away with it once or twice but it will bite your ass eventually
easty
easty
TAS
2213 posts
TAS, 2213 posts
13 Feb 2008 1:16am
Wet Willy said...

easty said...

Doesn't downhauling the sail pull the masts back together? Obviously not, or this topic wouldn't exist.


Some masts are so precisely engineered that the join is airtight, and when you slide the halves together, there's air pressure inside which pushes them apart a few cm. But if you hold them tight for a few seconds the air will find a way out, and the halves will stay together.


Just thinking about this (red wine and the rest of the week off makes you do that), but if this was so, wouldn't the airtight join, together with a small leak for the air to get out, together with the constant flexing of the mast while sailing creating a pump effect within the mast, contribute to masts sticking together? Which by the way I've never had happen. Must be the cheap masts again.
Also both my masts have holes in the top of the top section, plus the 400 is open at the top of the bottem section, surely most masts are like this, which would immediately let any compressed air out?
Disclaimer - I'm no engineer, had a red or two, and it's going to be windy tomorrow
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