skinny masts

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Langers
Langers
VIC
75 posts
VIC, 75 posts
3 Feb 2005 2:39pm
What are the advantages of skinny masts.
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JLangedyk
pole boy
pole boy
WA
292 posts
WA, 292 posts
3 Feb 2005 12:46pm
stiffer for lower carbon content, though the skinny base's are a bit dodge, i recommend if you want a skinny go get an RDM with a standard base.

Poley

why walk when u can sail?
Bails
Bails
WA
158 posts
WA, 158 posts
3 Feb 2005 1:24pm
I've heard differing opinions about the durability of skinny masts and I'm trying to decide whether to buy one.

Many wave sailors swear by the Powerex but some people reckon that the main reason the Powerex skinny doesn't break is that they're new. Newer mast, less likely to break. Like all products, a lot depends on the quality of the manufacturing.

And skinny masts create less wind resistance and less disturbance to the air flow across the sail. And are often lighter. However, you also have to cough for a new extension

I haven't used a skinny mast except on borrowed gear so I don't really know which way is the best. Has anyone tested breaking strains on different masts to see which is the strongest?
patsken
patsken
WA
717 posts
WA, 717 posts
3 Feb 2005 1:44pm
I`ve been using a 430cm Powerex "skinny" for the past 2 seasons and I`m very happy with it. It was a season old ie 2nd hand when I bought it `cos I wasn`t sure if they were the right way to go and didn`t want to waste too much money. I was going through a TidalWave "fatty" most seasons and getting PI**** OFF because they usually broke just past the 12 month mark.

I don`t have the latest and greatest sails but reckon there is very little difference in power or useability with my older sails (2000ish models).

Ken

steveh
steveh
WA
113 posts
WA, 113 posts
3 Feb 2005 2:58pm
skinnies are stronger than a standard mast for the same carbon content. Also, the most popular skinnies are 80 or 90% carbon , so they're "better" than a lot of the standard masts (flex, bend etc). Theyre also easy to rig with and handle (eg when you stuff things up and need to grab the mast).

But if you're on a budget, Ive heard you should pay for maximum carbon content, and dont worry about whether its skinny or standard sized.

i have ezzy sails , and I changed to skinnies this season and they do feel nice, but thats a very subjective thing.

steve
bonza
bonza
NSW
14 posts
NSW, 14 posts
4 Feb 2005 10:58am
I haven't even looked at new gear in 10 years and am seeing an industry drowning in marketing hype. So, are the skinnies that much more durable, I got told by a salesman the other day that when testing in Mauii, 4 normal masts were broken whilst none of the skinnies had a problem at all. I want to believe, but I don't, faith anyone?? I know in waves a lot of it is purely chance when masts break, but what's the general consensus for those with experience?

Glenn

Go hard or go home
shmage
shmage
WA
318 posts
WA, 318 posts
4 Feb 2005 9:21am
I have a skinny and yes i have snapped one, but when it went it went in 3 spots, so you could imagine the wipeout (worst in my life so far...). Some of the poundings i have taken would have snapped a normal mast without question, yet the skinny held up. For waves i dont think i could have a normal mast again. Just go to scarbs and see which masts snap.
Another point is that they are so easy to water start, even after a big wipeout, unlike a normal mast when it fills up with water.
Paul
Paul
WA
346 posts
WA, 346 posts
4 Feb 2005 10:21am
There is a definate advantage when using a skinny mast, when you need to grab the mast either gybing or waterstarting or recovering from mistakes. They allow a better grasp by hand and have less swinging weight. I admit it is about feel and as I am small and light I don't have to put as much effort into moving the sail around.

My powerex 400 mast is still going strong after 4 years of being the most used mast.
Skinny masts will break when caught in the wrong spot like all masts. The main advantage is that they will break less often after more wave abuse than regular masts. This has been proven in the warranty return rate of all brand skinnies, which is significantly lower than regular diameter masts.

My personal view is that they last at least twice as long and can take pounding after pounding at breaks like Scarborough, so they are worth it.

On the issue of price, 55% carbon wave masts were $550 eight years ago. New Skinnies are around $620 so an increase in $70 over eight years is not bad for a mast that lasts 2 to 3 times as long. Also you don't have to have new extensions as some older ones will fit or at the least you could trade them in as new ones start from $65.

All brands of skinnys are good but not all are the same bend etc so check them on your sails (ask to rig it at a shop to see). Skinny masts have been around for about 6 years, I think ezzy were first with their no limits masts, then powerex started about 5 years ago, so I wouldn't say they were new.
Bertie
Bertie
NSW
1351 posts
NSW, 1351 posts
4 Feb 2005 2:50pm
so what carbon percentage are different skinnys?? and how will the carbon % affect its longevity in the surf?
i see u can buy come cheap ones about 60% Carbon

www.outdoorshots.com.au/view_sessionshot.php?eid=43&pg=6&sid=04p1313110
www.outdoorshots.com.au/view_sessionshot.php?eid=45&pg=1&sid=04p2043521
www.outdoorshots.com.au/view_sessionshot.php?eid=101&pg=17&sid=04pc182323
mattressbuster
mattressbuster
WA
177 posts
WA, 177 posts
4 Feb 2005 2:33pm
No question the powerex rdm 400 s and 430 have revolutionised wave sailing. They are the nest selling wave mast in Hawaii and in oz and breakage is extremely rare - i am lucky enough to be able to see the general stats for normal diameter vs rdm and there is no comparison.

when you get 1 skinny its like having 3 or 4 normal masts.

The fibrespar skinnys were known for snapping and actally gave the whole concept a bad name - especially on the east coast which tends to lag behind WA for the latest trends in wave sailing - but australia has discovered that the powerex model is the bomb !

you can still break them but it happens so rarely . keep in mind that you will probably shred more sails as something has got to give on a huge wipeout eventually.

EVERYONE local and good uses these at margs for this very reason.

As an aside -Its usually the intermediate guys learning their wave lip timing that shred masts , snap boards (flatties) and bend booms - once you get your technique and timing down and your gear tuned you will be surprised at how rarely you break anything.



There is no spoon.
big flatus
big flatus
WA
37 posts
WA, 37 posts
4 Feb 2005 4:01pm
My powerex skinny is 3 years old! I used to break 1 or 2 mast a season I've given this mast a pounding. I have noticed my sails felt better when rigged on a fat mast but I can live with that as no broken mast = no shredded sails

flatus :

A reflex that expels intestinal gas through the anus [syn: fart, farting, wind, breaking wind]

[L., fr. flare to blow.] 1. A breath; a puff of wind. --Clarke.

2. Wind or gas generated in the stomach or other cavities of the body. --Quincy.
Greenroom
Greenroom
WA
7608 posts
WA, 7608 posts
4 Feb 2005 10:21pm
ive got a 2003 400 ezzy skinny 90% carbon and by far this has been the best purchase i have ever made
my next one i buy i would like to get a powerex just to see the difference but im guessing that if i had my eyes closed i wouldnt know any better
once i got rid of my learning gear (big board, cloth sails, fat masts and pink flexible boom) i bought ezzy sails and so therefore the mast to suit

GONE WITH THE WIND
bonza
bonza
NSW
14 posts
NSW, 14 posts
5 Feb 2005 2:59am
O.K So I just did some reading and was happy to see that the powerex skinnies are available in halves after the warranty period has expired if you break one. A big plus. Does anyone know of a distributor in Sydney NSW for them?

Glenn

Go hard or go home
Paul
Paul
WA
346 posts
WA, 346 posts
5 Feb 2005 11:12am
A 100% skinny is not the same as an 100% standard diameter mast. Normal masts with high carbon content are made for lightness and reflex as the main priority - these do break regularly but are aimed at high performance over strenght.

The skinny masts in high carbon have a much thicker wall and therefore have more strenght under load. They are not the lightest masts as they are made for strenght as first priority.
Therefore you can use 100% carbon skinnies with peice of mind.
Greenroom
Greenroom
WA
7608 posts
WA, 7608 posts
5 Feb 2005 12:22pm
ezzy skinnys you can buy in halfs and also mix n match so if you want a 400 and a 370 you buy a complete 400 and a bottom half of a 370 which makes up the 370 with your 400 top makes sense

GONE WITH THE WIND
Paul Kelf
Paul Kelf
WA
678 posts
WA, 678 posts
5 Feb 2005 12:28pm
Some quick calculations show that the extra thickness required to achieve the same strength would be 2.5 times and in turn the weight would be 1.8 times based on similar construction etc.
That is just to make them equal to, not better than.
So they must be very thick and heavy.


Paul Kelf
mattressbuster
mattressbuster
WA
177 posts
WA, 177 posts
5 Feb 2005 2:47pm
Skinnys seem to be an anomaly of the engineering principle that says as your diameter gets wider your wall can be thinner to provide the same strength.

Perhaps its the superior impact resistance of the thicker wall on the skinny.

Heavy these masts are not ! - try actually picking one up (1.8kg). So you get strength and super light weight. You can get a normal high content mast at around 1.6 kgs but they ping left right and centre in the surf.

There is no spoon.
bonza
bonza
NSW
14 posts
NSW, 14 posts
6 Feb 2005 1:02pm
I think I may have a possible logic behind the better strength. Being thinner, stiffness aside, means that they can flex further and put less stress on the material as they are required to bend further.

So as bend increases one side is put into extension and the other compression. For a required amount of bend that amount of compression and extension increases with the diameter of the mast. Imagine three straight lines, one on the inner edge, one on the outer edge and one throuigh the middle. Now make them curves, partial circles. The further apart these lines are the smaller the diameter of the of the inner circle and the larger circle need to be for a given bend of the middle line/curve. From one piece masts that I've broken it's usually a compression failure that makes them break, not a rip in the extension side. Laminate integrity has a lot to do with compression failures.

Glenn

Go hard or go home
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