If I wanted to build a 130 Lt board how much would i be looking at to make it .I have the shed & tools to make it although i have never made a board i am entertaining the idea of making one and that would be about the size i want to replace my 292 bombora with as this seems to be the board i find myself riding in the lighter winds its my bigger board so I'm curious.
what you'll find is after you have made your first board you will learn from that, then you'll through that one up the tip, the second one wont be perfect but you'll get some inspiration and finally you'll get it rite, personally unless you was trying to make something that isn't on the market i would go and buy one, have a look in the buy&sell section, last month i noticed a RRD 125 ADVANTGLIDE for $450 they were $2,400 when new 700 wide x145 and weighed 6.5kgs there like a miniature formula, and will handle a 6.5 to a 9.0 with ease ,that's is only an example there's heeps of good buys out there
if your useing your bombora a benchmark then 130lts in the old scale would be 111lt, the newer boards are wider so they can carry more sail area , you dont need as much volume as in the older style boards
I've just finished a board a tad smaller than that.
Going thru the receipts,
13kg/m2 foam $168
glass, peel ply, carbon, divinycell wadding $370
footstraps, plugs, mastbox, finbox, $182
epoxy resin, about $100
paint, about $100
foam for footpads $20
I've just finished 3 wave boards
www.seabreeze.com.au/forums/topic.asp?TOPIC_ID=64441
1 board =
EPS 15kg blank $60
sheet PVC about $100 or a bit more
Carbon 1.7m $150
Glass $7/m $105
Resin $100
Fstrap plugs Mast box fin boxes, vent plug about $80
Qcell $10
Opaque powder tint to colour the resin $5
Masking tape(bucket loads of), vac bag, Brushes, rollers, acetone, vinager,
disposable gloves. $70
Vinyl graphics $20
Quality Pads from US $75
Footstraps $60
F/S screws and washers $15!!!!!
Sandpaper maybe $10
Plus you'll need
Drill, grinder, router, Hot wire, compressor, rocker jigs,
I agree your first few boards will be cr4p, but later on it is so rewarding. Go for it.
Decrepit we have to chat about your footpad foam that could save me $50
A cheaper option is to make a wooden board. These boards cost about $300 each, it would be a bit more using new straps, fins etc. The first board is about 100 Lt & the other is about 70Lt.
The only drawback is that they are a little bit heavier than a foam board but the performance is very close. As keef said you would be better off buying second hand, but the sense of satisfaction of building and then riding a board of your own design is worth the effort.
http://www.grainsurf.com/forum/viewtopic.php?f=11&t=2764
www.grainsurf.com/forum/viewtopic.php?f=11&t=2933
Thanks for all the input i thought i could use fridge compressor for the vacuum pump i like the look of timber & yes buying a second hand board would be cheaper its some thing to think about 
^ Wood boards are as durable as a foam board if they are made well and looked after properly. As far as stiffness goes, I made the wave board too stiff as it does have a very solid ride over Port Philip chop. I have had water inside 
(I need to pay more attention to attaching the blocks for the foot straps) and have drilled a 1/4" hole either side of the stringer for drainage. Once the water is out they are resealed.
Foam supplier. Try foamex. Www.Foamex.com.au. Get a quote from them. Picked some up last weak they will cut to size. Very cheap.
i just looked up the site you mentioned ikw777 thanks i have the timber except for balsa & ceda in shed already any more references i could look at would be great think of all the fun i could have with my spoke shaves
Here are some more references
www.akushaper.com/
www.swaylocks.com/
www.lbwindsurfing.com/raceboard/design-construction-longboard-windsurfer/
treetosea.org/
www.surfboardbuilding.com/index.html
pages.infinit.net/endo99/board.html
www.gurit.com/core/core_picker/download.asp?documenttable=libraryfiles&id=1119
Watch all of these his methods and steps are almost identicle to how I do it except I don't have the shaping machine and my carbon layout is a bit different, they are also on you tube. You'll see why I spend so much on masking tape.
www.nelsonfactory.com/en/the-factory/video1.php
thanks this is all fantastic couple of questions do wooden boards have to be made bigger because they are heavier to achieve the same flotation. Also designing on computer or is it shape it as it goes .Looking at the many different board shapes do i go short and fat for that Lt or longer& thinner i have a f2 103 Lt i thought roughly that shape but a bit bigger, wider, longer.would get the volume to my required size
Hi Max. If you go wood don't worry about going any bigger. The difference would only be a couple of Lts that would hardly be noticeable. The only main draw back for the average sailor is a slightly slower acceleration, but once you are on the plane here is not much difference. If you can design it on the computer, that is a big advantage. Aku shaper is a good basic program once you work it out, but it will give a constant rail shape. This is not too much of a draw back as you can edit each splice if you want to. You could also build a hybrid in that you build a wood board with foam rails for easy construction. As for the shape, have a look at the manufacturer’s web sites such as Carbon Art, Starboard etc to give you a bit of a guide to the current shapes. Short & fat works well.
