wide tail boom

> 10 years ago
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nick0
nick0
NSW
510 posts
NSW, 510 posts
8 Aug 2012 8:42pm
gave it a go , turned out realy neat. laying it next to an identical boom ive made it way 2 wide .. 38cm between the arms at the tail ..pullies/ss bolts/carbon n resin added up to no more than $100 .. took a bit

of time.. depending on how it goes on the water nxt one will be quick n easie as.. $5 can of black spray paint to finish it off..

balsa wood core,6 layers of 200ounce bi-axel carbon. so stiff it aint funny ..



Kimba
Kimba
SA
459 posts
SA, 459 posts
8 Aug 2012 9:42pm
Nice one Nick!

How does the centre of mass compare to the original? I am interested to see how the extra width goes with stance as well as bagging the sail.
nick0
nick0
NSW
510 posts
NSW, 510 posts
8 Aug 2012 10:56pm
as i dont have a formula board atm im hopeing some one will take it out at marmong this satday and tell me how it goes :) .. useing the 2 boom pieces in the pictures the modified one is only 20grams hevier .... picking them up thou and squezing the arm together the only flex in in the actual tube .. the plate the the pullies are mounted is solid as .. just need a test pilot now:)
BarryFawkes
BarryFawkes
NSW
149 posts
NSW, 149 posts
9 Aug 2012 12:20am
well done nick might be bit windy sat though
Brett Morris
Brett Morris
NSW
1204 posts
NSW, 1204 posts
9 Aug 2012 12:00pm
nice work....not having a board to test it on is a bit of an oversight though...
FiremanSam
FiremanSam
VIC
148 posts
VIC, 148 posts
9 Aug 2012 12:51pm
Nice post... I've got an older 'donor' boom I could give this a go on, however can anyone tell me - wouldn't this stress the front of the boom being stretched out this far ?
nick0
nick0
NSW
510 posts
NSW, 510 posts
4 Sep 2012 9:49pm
dont think so .. only pushes it out 20cms past norm .. 2.5m from the clamp dunno wat degrees or how ya work it out .. ended up doing the same to a slalom boom ..dunno y , it didnt need it , got bored one day ... stuffed it up as it no longer fits my biggest slalom sail -_- .. half way thru a proto hydrofoil ..




glassed up the vertical fin this arvo.. the foil is finished for now .. untill i made all the parts up and make a jig to hold all straight and plum while glassing it all together .. all parts will be balsa core all carbon.. maily cause the balse is realy cheap and easy to get .. mainly uni-direction, with a few layers of biaxel carbon to reduce/cancel out anny twisting /worping action.. dunno wether this foil is going to be the smaller back one or the larger front one .. at 95mm wide and 10mm fat, 60cm long .. no idear how much lift it will create .. no drawings or plans to show just dodged it up .. anny idear on surface area/foil size to know how much weight it will lift at a normal/slow windsurfing speed .. ??
Fez
Fez
NSW
131 posts
Fez Fez
NSW, 131 posts
5 Sep 2012 8:07am
At 60cm...... it will create way too much lift.
That is more than double the existing foil size for foiling windsurfers.
Very ambitious project with no plans etc
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