alloy mast for catrig

[ccknoester]

I might want to build a easy to handle trailer sailer. I've seen a free boatplan the pilgrim 590 of witch i could use as a good start i think.

Another boat I like very much is the tilapia 650 from ocquenteau, obviously for the rig design.

What i'd like to do is combine these two parts.

But the carbon mast of the talapia 650 i think not very easy to built at home. So i figured i might want an alloy 300$ mast instead.

if i take a round profile tapered mast of 8m outside diameter 114 inside 110 i think Wx is about 19364,55665 (at the feet of the mast)

the max rising moment of the pilgrim 590 i think is something about 650 kgf/m or 6,5 KNm

I think the sigma is about 335 n/mm2 (just for an amature boat builder)

wil this mast be strong enough