how heavy is your mast?

[snowleopard]

looking for an approximate figure for the weight of a 15-17 metre mast, including rigging. it may sound bizarre but i'm trying to compute moments of inertia for comparison with my strange rig.

thanks

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[maxi]

My 12m rig is approx 400lbs, a figure derived from measuring the electrical lifting load on the windlass during unstepping, and comparing with the electrical load when removing an engine of known weight.
No doubt someone will now tell me it's an invalid comparison, but carrying the mast and standing rigging certainly feels like carrying two couch potatos.

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[ponapay]

My 16 metre

mast with rigging weighs 458lbs according to the scale on the mast crane I use.

That is without lower riggings screws and without mast head instrumentation (which I climb the mast to fix after the mast is secure - actually I use the same crane to hoist me up).



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[snowleopard]

thanks guys. my wing is 15m and supposedly weighs 250kg which the manufacturer claims is about the same as a stayed rig. sounds as though it's about right.

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[William_H]

I suspect that you really need to weigh a mast to know. I think you will find the weight goes up exponentially with size like a boat . (is that the word something like squared or cubed to the increase in length.) I was involved in fitting a mast to a Farr 40 about 70 ft tall that was said to weigh 500kg with rigging and gear. That was a fractional rig and it seems masthead rig masts are much heavier for their length. My own fractional 8 metre mast weighs around 25kg with rigging but a lot lighter at the top. Good luck with your calculations. regards will

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[JOHNOO]

Your right!!!

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[geoffatstanpit]

It'll be a cube law - if all the dimensions increase proportionally i e twice the height and twice the thickness of everything will be 8 times the weight.

Geoff

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