Forums > Land Yacht Sailing Construction

Carbon vs aluminum mast

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Created by us123 24 days ago, 5 Apr 2017
us123
6 posts
5 Apr 2017 9:02AM
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I have a chance to purchase a sail works 520 80% carbon mast witch is lighter than my fed 5 aluminum mast but is the 520 just as strong ? Does anyone know

blake52
120 posts
8 Apr 2017 4:33AM
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There has been a rash of people capsizing and breaking their carbon masts lately. 2 mini skeeters and a mini that I know of in the last 6 months. Unless you run a roll bar, which the skeeters now do, that means your head goes on the ground if you tip over. Also As I mentioned in an email, if you are running a particular class you may not be allowed to run carbon. Aluminum as thick as a fed 5 mast can take a serious crash before it bends permanently and bend a lot before it breaks.
www.facebook.com/100011651047902/videos/273253286406371/
for example.

Hiko
1123 posts
8 Apr 2017 3:30PM
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Food for thought with the lighter masts. The lower internal stiffener would not be enough to save your head and upper body I dont think

us123
6 posts
8 Apr 2017 4:33PM
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Thanx for sharing that video Blake After watching that extraordinary video all I can say is WOW!!! Did you Crack anything...yep! I would say stick with aluminum....... that was kinda cool looking (the crash)

blake52
120 posts
10 Apr 2017 6:57AM
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Thing with a crash like that, where you end up back on the wheels, is that the boat powers back up before you brain does and you suddenly realize that someone better be driving or it's all going to start again.
No permanent damage to me or the boat. I sailed back to camp. Bent the front forks a little (easy to bend back) bent the mast only a little (I've done as much damage oversheeting). I didn't walk well for a few days but it was all strains and bruises; a testimonial to helmets and seatbelts...and to stay on topic, strong masts.

Sylk
WA, 186 posts
10 Apr 2017 3:03PM
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us123 I think you're asking the wrong question.
Relative strength is not the first consideration.
What you should be asking is does the bend characteristic of the mast match the sail I want to use on it? That is a very difficult question to answer if your talking about using a sail cut for an alloy mast on a composite mast.

If the alloy mast was a constant diameter and thickness then you should be ok using a "constant curve" composite mast but you still need to know if the amount of curve matches. Measure the IMCS of your old alloy mast and compare to the new one.

Measuring IMCS:www.sailworks.com/pdfs/MCS_test.pdf

Hiko
1123 posts
14 Apr 2017 11:34AM
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Select to expand quote
us123 said..
Thanx for sharing that video Blake After watching that extraordinary video all I can say is WOW!!! Did you Crack anything...yep! I would say stick with aluminum....... that was kinda cool looking (the crash)


I think we have to conclude that the heavy class5 type aluminium mast would be a lot safer in those circumstances

Test pilot 1
WA, 1411 posts
Monday , 24 Apr 2017 10:41PM
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Problem these days is availability of the aluminium in the correct sizes

aus230
WA, 1599 posts
Tuesday , 24 Apr 2017 11:39PM
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Or the right temper, T6 is impossible to find in Australia

bazl
WA, 647 posts
Tuesday , 25 Apr 2017 7:55AM
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Select to expand quote
aus230 said..
Or the right temper, T6 is impossible to find in Australia


Looks like there might be a source for 50mm
www.yachtmasts.com.au/contents/en-us/d3.html

aus230
WA, 1599 posts
Tuesday , 25 Apr 2017 9:39AM
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That's great Barry, I will see what it costs, still need to find a tube that fits inside.

Hiko
1123 posts
Tuesday , 25 Apr 2017 10:36AM
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Heat treating aluminium to produce T6 involves oven heating and quenching.
The temperatures required are not that great
130 degrees C to 200 degrees C dependant on time
Maybe not that difficult?



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"Carbon vs aluminum mast" started by us123