Hi Noodle, how’s that 8’2" egg working ? In March you considered shaping an egg-ish shape 8’2"x14.8"x22.25"x18" rounded-pin tail for hollow beach breaks. What was your final choice ? Are you happy with the board, how does it ride ? I’m thinking about shaping myself a 7’6" egg for the hollow beach breaks we get in summer (I live in Landes, France). Untill now I’ve been surfing a 9’ x 22" x 3", single fin, domed deck, thin down rails, very thin and narrow tail, lots of nose & tail rocker and 7-8mm V from nose to tail. The board is perfect for paddling and catching waves (I weight 150 pounds), noserides fine and works great both in hollow waves and bigger outer banks surf. However, it won’t fit in my car (could get stolen during those looonnng french lunch breaks ! ) and I halfway broke it last summer in real sucky waves. So I thought about an egg outlined such as Bruce Jones’ 7’6" x 22" x 3", with a rather flat deck, more thickness in nose and tail, 6-7 mm V all along (also to help in keeping rails thin enough), single glassed on fin (where positionned ?), hard rails from last 50 cm. The idea is to cope for the decrease in flotation with boxier rails, thicker nose and tail, and wider tail. Turning ability and holding power would be maintained by smaller length, V and hard rails. Am I reasonning wrong ? What rocker numbers should I use (I’m not starting off a pre-shaped blank, this is a balsa/EPS core project) Pierre
Hey Pierre, I didn’t build the egg. I ran out of time. I have an 8-0 on the drawing board. Right now I’m building a 9-6 fat performer. I’m also wrestling a broken computer, so I’m away from the other system which has my program. I like your egg-thinking. Eggs are great for sucking beach breaks. The narrow stern, full outline, lots of rocker, and some tail “V” will let you drop-turn inside some of the fastest heaving rollers. I’ve never tried entry “V”, and always thought it experimental. I like the thick rail idea to maximize floatation in a shortened bomber. Tomorrow morning I’ll throw some numbers together and post them. I really enjoy designing rocker and getting feedback. My blank cutter pro thinks my insistence on making different rocker templates for each board is a little …whacked. Rocker is an interesting science. I’m thinking a rocker about 3% of board length for your egg with only slight progression… Tell me if you still intend to use entry “V”. That should lessen the need for progression. Also, how well does that thinned-out 22" wide longboard fit under your arm? We should max out this egg’s width.>>> Hi Noodle, how’s that 8’2" egg working ?>>> In March you considered shaping an egg-ish shape > 8’2"x14.8"x22.25"x18" rounded-pin tail for hollow > beach breaks. What was your final choice ? Are you happy with the board, > how does it ride ?>>> I’m thinking about shaping myself a 7’6" egg for the hollow beach > breaks we get in summer (I live in Landes, France).>>> Untill now I’ve been surfing a 9’ x 22" x 3", single fin, domed > deck, thin down rails, very thin and narrow tail, lots of nose & tail > rocker and 7-8mm V from nose to tail. The board is perfect for paddling > and catching waves (I weight 150 pounds), noserides fine and works great > both in hollow waves and bigger outer banks surf. However, it won’t fit in > my car (could get stolen during those looonnng french lunch breaks ! ) and > I halfway broke it last summer in real sucky waves.>>> So I thought about an egg outlined such as Bruce Jones’ 7’6" x > 22" x 3", with a rather flat deck, more thickness in nose and > tail, 6-7 mm V all along (also to help in keeping rails thin enough), > single glassed on fin (where positionned ?), hard rails from last 50 cm. > The idea is to cope for the decrease in flotation with boxier rails, > thicker nose and tail, and wider tail. Turning ability and holding power > would be maintained by smaller length, V and hard rails.>>> Am I reasonning wrong ? What rocker numbers should I use (I’m not starting > off a pre-shaped blank, this is a balsa/EPS core project)>>> Pierre
I like your egg-thinking. Eggs are great for sucking beach breaks. The > narrow stern, full outline, lots of rocker, and some tail “V” > will let you drop-turn inside some of the fastest heaving rollers. Even with a single fin, thicker rails and a tail 14.9" wide ?>>> I’ve never tried entry “V”, and always thought it experimental. I checked back my board and here’s my attempt to give you some feedback on the V thing. The V goes as follow (from tail to nose): distance from tail (cm); V per side (mm) (00;0.5) (10;2) (20;5) (30;6) (40;8) (50;8) (60;8) (70;8) (80;7.5) (90;7.5) (100;7) (110;7) (120;7) (130;7) (140;7) (150;7) (160;7) (170;7) (180;7) (190;7) (200;7) (210;7) (220;6.5) (230;5 (240;4.5) (250;4) (260;2.5) (270;1) (272;0) The V has flat sides but it’s sort of flattened/rounded near the stringer. Is that unusual ? As far as what it does, I don’t really know what has to do with technics or design since I’ve never tried anything else (apart from shortboards a long time ago). All I know is that other 9’ longboarders I see seem to paddle faster than I do, catch waves more easily, hang 5 or 1O but they seem to have troubles with faster or bigger waves. Although it has no concaved nose, my board can noseride easily any type of wave from 1’ to 8’, cruising on the upper part of the wave during long distances (is it because of front V or lots of tail rocker). However I remain a few inches from the nose and seldom manage to hang 5 or 10 as the board slows down too much or sinks (this I guess because of nose rocker and my own ability to nose ride). For the rest people told me it turns rather like a short board. Except for cutbacks, I do most turns smoothly without having to backup to the tail or apply lots of pressure on my back foot (again, maybe the V…) I’ve read of people talking about spin-outs with longboards but it never happened to me, it seems to always stick to the wave, even when you’re right in the pocket, backside grabrail, 1 foot from the nose with nearly no water underneath. Is it due to the V, the low & thin rails, the “banana” rocker … I don’t know.>>> I like the thick rail idea to maximize floatation in a shortened bomber.>>> Tomorrow morning I’ll throw some numbers together and post them. I really > enjoy designing rocker and getting feedback. My blank cutter pro thinks my > insistence on making different rocker templates for each board is a little > …whacked. Rocker is an interesting science. I really a begginer, I just finish my first board after over 50 hours of work !(a balsa/EPS mini longboard for my 11 years old son 7’3 x 18"1/3 x 2"1/3) But to my inderstanding of surf design, rocker and fin setup are determinant factors that seem too often underestimated.>>> I’m thinking a rocker about 3% of board length for your egg with only > slight progression… Tell me if you still intend to use entry > “V”. That should lessen the need for progression. Is 3% referring to tail rocker ? What do you mean by progression ?>>> does that thinned-out 22" wide longboard fit under your arm? We > should max out this egg’s width. I checked it out and I think a 23" wide & a bit thicker would fit (I’m 5’10") Good luck with your computer - Pierre
Even with a single fin, thicker rails and a tail 14.9" wide ?>>> I checked back my board and here’s my attempt to give you some feedback on > the V thing. The V goes as follow (from tail to nose):>>> distance from tail (cm); V per side (mm)>>> (00;0.5)>>> (10;2)>>> (20;5)>>> (30;6)>>> (40;8)>>> (50;8)>>> (60;8)>>> (70;8)>>> (80;7.5)>>> (90;7.5)>>> (100;7)>>> (110;7)>>> (120;7)>>> (130;7)>>> (140;7)>>> (150;7)>>> (160;7)>>> (170;7)>>> (180;7)>>> (190;7)>>> (200;7)>>> (210;7)>>> (220;6.5)>>> (230;5>>> (240;4.5)>>> (250;4)>>> (260;2.5)>>> (270;1)>>> (272;0)>>> The V has flat sides but it’s sort of flattened/rounded near the stringer. > Is that unusual ?>>> As far as what it does, I don’t really know what has to do with technics > or design since I’ve never tried anything else (apart from shortboards a > long time ago).>>> All I know is that other 9’ longboarders I see seem to paddle faster than > I do, catch waves more easily, hang 5 or 1O but they seem to have troubles > with faster or bigger waves.>>> Although it has no concaved nose, my board can noseride easily any type of > wave from 1’ to 8’, cruising on the upper part of the wave during long > distances (is it because of front V or lots of tail rocker). However I > remain a few inches from the nose and seldom manage to hang 5 or 10 as the > board slows down too much or sinks (this I guess because of nose rocker > and my own ability to nose ride).>>> For the rest people told me it turns rather like a short board. Except for > cutbacks, I do most turns smoothly without having to backup to the tail or > apply lots of pressure on my back foot (again, maybe the V…)>>> I’ve read of people talking about spin-outs with longboards but it never > happened to me, it seems to always stick to the wave, even when you’re > right in the pocket, backside grabrail, 1 foot from the nose with nearly > no water underneath. Is it due to the V, the low & thin rails, the > “banana” rocker … I don’t know.>>> I really a begginer, I just finish my first board after over 50 hours of > work !(a balsa/EPS mini longboard for my 11 years old son 7’3 x > 18"1/3 x 2"1/3) But to my inderstanding of surf design, rocker > and fin setup are determinant factors that seem too often underestimated.>>> Is 3% referring to tail rocker ? What do you mean by progression ?>>> I checked it out and I think a 23" wide & a bit thicker would fit > (I’m 5’10")>>> Good luck with your computer - Pierre I’m not a fan of narrow tails, even with single fins. Shorten a wide board, and the tail should be even wider to accomodate the required aspect slope. Tail widths can be modified much better in longer shapes than in shorter ones. If your longboard V is rounded in the entry area, that’s just traditional spoon. The board would cut through chop well. However, it would be slower, and less stable. Yes, the 3% rocker refers to the tail rocker being 3% of board length. Rocker progression refers to the increase in rocker curve as the rocker approaches the tail. On longboards, rocker progression is required in order to increase the slope coming off the tail. On other boards, progression is required for shaping tail V. Think about it. Here’s a 7-6 shape in inches. I’ve examined this form on 3d CAD and it looks uniform, even with the wide tail. It has just a little rocker progression to accomodate .1" to .2" of V on each side of the fin The deck line is merely a good close tolerance blank-cut line. The mid-board rail foam cross section is 2.9" thick with thickened rails. The board width and rails are designed for paddling speed. I also have it in metric, but the stringer lengths are all decimal inch conversions. Tell me if you would prefer that. Length Outline Rocker Deck 0 , 0.00 , 2.34 , 3.44 0 , 0.60 , 2.34 , 3.44 0.5 , 1.85 , 2.26 , 3.43 1 , 2.54 , 2.17 , 3.42 2 , 3.51 , 2.02 , 3.40 3 , 4.25 , 1.88 , 3.38 4 , 4.87 , 1.75 , 3.36 5 , 5.39 , 1.63 , 3.34 6 , 5.86 , 1.52 , 3.32 7 , 6.28 , 1.41 , 3.30 8 , 6.66 , 1.31 , 3.29 9 , 7.01 , 1.22 , 3.27 10 , 7.33 , 1.13 , 3.26 11 , 7.62 , 1.04 , 3.24 12 , 7.90 , 0.96 , 3.23 13 , 8.16 , 0.89 , 3.22 14 , 8.40 , 0.82 , 3.21 15 , 8.62 , 0.75 , 3.20 16 , 8.83 , 0.68 , 3.18 17 , 9.02 , 0.62 , 3.17 18 , 9.21 , 0.57 , 3.16 19 , 9.38 , 0.51 , 3.16 20 , 9.54 , 0.46 , 3.15 21 , 9.69 , 0.41 , 3.14 22 , 9.82 , 0.37 , 3.13 23 , 9.95 , 0.33 , 3.13 24 , 10.07 , 0.29 , 3.12 25 , 10.19 , 0.25 , 3.11 26 , 10.29 , 0.22 , 3.11 27 , 10.38 , 0.19 , 3.10 28 , 10.47 , 0.16 , 3.10 29 , 10.55 , 0.13 , 3.10 30 , 10.62 , 0.11 , 3.10 31 , 10.69 , 0.09 , 3.09 32 , 10.75 , 0.07 , 3.09 33 , 10.80 , 0.05 , 3.09 34 , 10.85 , 0.04 , 3.09 35 , 10.89 , 0.02 , 3.09 36 , 10.92 , 0.01 , 3.09 37 , 10.95 , 0.01 , 3.09 38 , 10.97 , 0.00 , 3.09 39 , 10.98 , 0.00 , 3.10 40 , 10.99 , 0.00 , 3.10 41 , 11.00 , 0.00 , 3.10 42 , 11.00 , 0.01 , 3.11 43 , 11.00 , 0.01 , 3.11 44 , 11.00 , 0.02 , 3.12 45 , 11.00 , 0.04 , 3.12 46 , 10.99 , 0.05 , 3.13 47 , 10.99 , 0.07 , 3.14 48 , 10.98 , 0.09 , 3.15 49 , 10.97 , 0.11 , 3.15 50 , 10.95 , 0.14 , 3.16 51 , 10.93 , 0.16 , 3.17 52 , 10.91 , 0.20 , 3.19 53 , 10.87 , 0.23 , 3.20 54 , 10.83 , 0.27 , 3.21 55 , 10.78 , 0.31 , 3.22 56 , 10.72 , 0.35 , 3.24 57 , 10.65 , 0.40 , 3.25 58 , 10.57 , 0.45 , 3.27 59 , 10.47 , 0.50 , 3.29 60 , 10.36 , 0.56 , 3.31 61 , 10.23 , 0.62 , 3.33 62 , 10.09 , 0.69 , 3.35 63 , 9.93 , 0.76 , 3.37 64 , 9.74 , 0.84 , 3.39 65 , 9.53 , 0.92 , 3.42 66 , 9.30 , 1.01 , 3.45 67 , 9.04 , 1.10 , 3.48 68 , 8.74 , 1.20 , 3.51 69 , 8.40 , 1.31 , 3.54 70 , 8.03 , 1.43 , 3.58 71 , 7.60 , 1.56 , 3.62 72 , 7.11 , 1.71 , 3.67 73 , 6.54 , 1.86 , 3.72 74 , 5.88 , 2.04 , 3.77 75 , 5.09 , 2.24 , 3.84 76 , 4.11 , 2.48 , 3.92 77 , 2.77 , 2.77 , 4.03 77.5 , 1.81 , 2.96 , 4.11 78 , 0.00 , 3.19 , 4.29 Rail: Width , Deck , Bottom 0 , 2.06 , -0.84 1 , 2.06 , -0.84 2 , 2.06 , -0.84 3 , 2.06 , -0.84 4 , 2.05 , -0.84 5 , 2.04 , -0.84 6 , 2.00 , -0.84 6.5 , 1.98 , -0.84 7.0 , 1.94 , -0.84 7.5 , 1.89 , -0.84 8.5 , 1.74 , -0.84 9.0 , 1.62 , -0.84 9.9 , 1.30 , -0.83 10 , 1.25 , -0.82 10.1 , 1.19 , -0.80 10.2 , 1.14 , -0.78 10.3 , 1.07 , -0.75 10.4 , 1.00 , -0.71 10.5 , 0.92 , -0.67 10.6 , 0.83 , -0.61 10.7 , 0.72 , -0.54 10.85 , 0.52 , -0.40 10.95 , 0.30 , -0.23 11.00 , 0.00 , -0.00
I shouldn’t have put a narrow stern on your shape. Here’s the board with a rounded pin tail. Length , Outline , Rocker , Deck 0 , 0.00 , 2.34 , 3.44 0 , -0.00 , 2.34 , 3.44 0.5 , 1.50 , 2.26 , 3.43 1 , 2.24 , 2.17 , 3.42 2 , 3.29 , 2.02 , 3.40 3 , 4.07 , 1.88 , 3.38 4 , 4.72 , 1.75 , 3.36 5 , 5.28 , 1.63 , 3.34 6 , 5.77 , 1.52 , 3.32 7 , 6.21 , 1.41 , 3.30 8 , 6.61 , 1.31 , 3.29 9 , 6.97 , 1.22 , 3.27 10 , 7.31 , 1.13 , 3.26 11 , 7.61 , 1.04 , 3.24 12 , 7.90 , 0.96 , 3.23 13 , 8.17 , 0.89 , 3.22 14 , 8.41 , 0.82 , 3.21 15 , 8.64 , 0.75 , 3.20 16 , 8.86 , 0.68 , 3.18 17 , 9.06 , 0.62 , 3.17 18 , 9.24 , 0.57 , 3.16 19 , 9.41 , 0.51 , 3.16 20 , 9.58 , 0.46 , 3.15 21 , 9.73 , 0.41 , 3.14 22 , 9.87 , 0.37 , 3.13 23 , 10.00 , 0.33 , 3.13 24 , 10.12 , 0.29 , 3.12 25 , 10.23 , 0.25 , 3.11 26 , 10.33 , 0.22 , 3.11 27 , 10.42 , 0.19 , 3.10 28 , 10.51 , 0.16 , 3.10 29 , 10.58 , 0.13 , 3.10 30 , 10.65 , 0.11 , 3.10 31 , 10.72 , 0.09 , 3.09 32 , 10.77 , 0.07 , 3.09 33 , 10.82 , 0.05 , 3.09 34 , 10.86 , 0.04 , 3.09 35 , 10.90 , 0.02 , 3.09 36 , 10.93 , 0.01 , 3.09 37 , 10.95 , 0.01 , 3.09 38 , 10.97 , 0.00 , 3.09 39 , 10.99 , 0.00 , 3.10 40 , 10.99 , 0.00 , 3.10 41 , 11.00 , 0.00 , 3.10 42 , 11.00 , 0.01 , 3.11 43 , 11.00 , 0.01 , 3.11 44 , 11.00 , 0.02 , 3.12 45 , 11.00 , 0.04 , 3.12 46 , 10.99 , 0.05 , 3.13 47 , 10.99 , 0.07 , 3.14 48 , 10.98 , 0.09 , 3.15 49 , 10.97 , 0.11 , 3.15 50 , 10.95 , 0.14 , 3.16 51 , 10.93 , 0.16 , 3.17 52 , 10.91 , 0.20 , 3.19 53 , 10.87 , 0.23 , 3.20 54 , 10.83 , 0.27 , 3.21 55 , 10.78 , 0.31 , 3.22 56 , 10.72 , 0.35 , 3.24 57 , 10.65 , 0.40 , 3.25 58 , 10.57 , 0.45 , 3.27 59 , 10.47 , 0.50 , 3.29 60 , 10.36 , 0.56 , 3.31 61 , 10.23 , 0.62 , 3.33 62 , 10.09 , 0.69 , 3.35 63 , 9.93 , 0.76 , 3.37 64 , 9.74 , 0.84 , 3.39 65 , 9.53 , 0.92 , 3.42 66 , 9.30 , 1.01 , 3.45 67 , 9.04 , 1.10 , 3.48 68 , 8.74 , 1.20 , 3.51 69 , 8.40 , 1.31 , 3.54 70 , 8.03 , 1.43 , 3.58 71 , 7.60 , 1.56 , 3.62 72 , 7.11 , 1.71 , 3.67 73 , 6.54 , 1.86 , 3.72 74 , 5.88 , 2.04 , 3.77 75 , 5.09 , 2.24 , 3.84 76 , 4.11 , 2.48 , 3.92 77 , 2.77 , 2.77 , 4.03 77.5 , 1.81 , 2.96 , 4.11 78 , 0.00 , 3.19 , 4.29
Many thanks Noodle, I can’t wait to plot it on paper and see what it looks like. I’m not sure I understand well how to use the numbers : the length goes from 0 to 78, are you sure that’s a 7’6" shape ? What do the rail numbers stand for ? Pierre
Many thanks Noodle, I can’t wait to plot it on paper and see what it looks > like. I’m not sure I understand well how to use the numbers : the length > goes from 0 to 78, are you sure that’s a 7’6" shape ? What do the > rail numbers stand for ?>>> Pierre Mon ami, Don’t plot that! Here’s a template which is REALLY 7-6. It has 15.4" tail, 22" center, 17.8" nose, and 2.2" forward offset. The nose tips to 27 degrees from center tangent. I looked it on 3d CAD. Looks good! Board lengths are along the stringer. Measure out to one rail, then flip the template over for the other rail. Rail widths are from the stringer outward. Measure rail heights from the rail line (vertical tangent bisect) up to the deck and down to the bottom. Good luck. Length , Outline , Rocker , Deck 0 , 0.00 , 2.70 , 3.80 0.5 , 1.45 , 2.61 , 3.78 1 , 2.18 , 2.53 , 3.76 2 , 3.20 , 2.38 , 3.73 3 , 3.96 , 2.23 , 3.70 4 , 4.59 , 2.10 , 3.66 5 , 5.14 , 1.97 , 3.63 6 , 5.62 , 1.85 , 3.60 7 , 6.05 , 1.74 , 3.58 8 , 6.43 , 1.63 , 3.55 9 , 6.79 , 1.53 , 3.52 10 , 7.12 , 1.43 , 3.50 11 , 7.42 , 1.34 , 3.47 12 , 7.70 , 1.25 , 3.45 13 , 7.96 , 1.17 , 3.42 14 , 8.20 , 1.09 , 3.40 15 , 8.43 , 1.01 , 3.38 16 , 8.64 , 0.94 , 3.36 17 , 8.84 , 0.87 , 3.34 18 , 9.02 , 0.81 , 3.32 19 , 9.20 , 0.74 , 3.31 20 , 9.36 , 0.68 , 3.29 21 , 9.51 , 0.63 , 3.27 22 , 9.65 , 0.58 , 3.26 23 , 9.78 , 0.52 , 3.24 24 , 9.91 , 0.48 , 3.23 25 , 10.02 , 0.43 , 3.21 26 , 10.13 , 0.39 , 3.20 27 , 10.23 , 0.35 , 3.19 28 , 10.32 , 0.31 , 3.18 29 , 10.40 , 0.27 , 3.17 30 , 10.48 , 0.24 , 3.16 31 , 10.55 , 0.21 , 3.15 32 , 10.61 , 0.18 , 3.14 33 , 10.67 , 0.15 , 3.13 34 , 10.73 , 0.13 , 3.13 35 , 10.77 , 0.11 , 3.12 36 , 10.82 , 0.09 , 3.11 37 , 10.85 , 0.07 , 3.11 38 , 10.89 , 0.05 , 3.11 39 , 10.91 , 0.04 , 3.10 40 , 10.94 , 0.03 , 3.10 41 , 10.96 , 0.02 , 3.10 42 , 10.97 , 0.01 , 3.10 43 , 10.98 , 0.00 , 3.10 44 , 10.99 , 0.00 , 3.10 45 , 11.00 , 0.00 , 3.10 46 , 11.00 , 0.00 , 3.10 47 , 11.00 , 0.00 , 3.10 48 , 11.00 , 0.01 , 3.11 49 , 11.00 , 0.02 , 3.11 50 , 11.00 , 0.03 , 3.12 51 , 11.00 , 0.04 , 3.12 52 , 11.00 , 0.05 , 3.13 53 , 10.99 , 0.07 , 3.14 54 , 10.99 , 0.09 , 3.15 55 , 10.98 , 0.11 , 3.16 56 , 10.97 , 0.13 , 3.17 57 , 10.96 , 0.16 , 3.18 58 , 10.95 , 0.18 , 3.19 59 , 10.93 , 0.21 , 3.20 60 , 10.90 , 0.25 , 3.22 61 , 10.88 , 0.28 , 3.23 62 , 10.84 , 0.32 , 3.25 63 , 10.80 , 0.36 , 3.27 64 , 10.76 , 0.41 , 3.28 65 , 10.70 , 0.45 , 3.30 66 , 10.64 , 0.50 , 3.33 67 , 10.57 , 0.56 , 3.35 68 , 10.49 , 0.61 , 3.37 69 , 10.40 , 0.67 , 3.40 70 , 10.29 , 0.74 , 3.42 71 , 10.18 , 0.80 , 3.45 72 , 10.05 , 0.88 , 3.48 73 , 9.90 , 0.95 , 3.51 74 , 9.74 , 1.03 , 3.55 75 , 9.56 , 1.12 , 3.59 76 , 9.36 , 1.21 , 3.62 77 , 9.14 , 1.30 , 3.66 78 , 8.90 , 1.41 , 3.71 79 , 8.63 , 1.52 , 3.76 80 , 8.33 , 1.63 , 3.81 81 , 7.99 , 1.76 , 3.86 82 , 7.61 , 1.90 , 3.92 83 , 7.19 , 2.04 , 3.98 84 , 6.71 , 2.20 , 4.05 85 , 6.16 , 2.38 , 4.13 86 , 5.53 , 2.58 , 4.22 87 , 4.77 , 2.80 , 4.33 88 , 3.84 , 3.07 , 4.45 89 , 2.57 , 3.39 , 4.62 89.5 , 1.67 , 3.60 , 4.74 90 , 0.00 , 3.85 , 4.95 RAIL: Width , Deck , Bottom 0 , 2.06 , -0.84 1 , 2.06 , -0.84 2 , 2.06 , -0.84 3 , 2.06 , -0.84 4 , 2.05 , -0.84 5 , 2.04 , -0.84 6 , 2.00 , -0.84 6.5 , 1.98 , -0.84 7.0 , 1.94 , -0.84 7.5 , 1.89 , -0.84 8.5 , 1.74 , -0.84 9.0 , 1.62 , -0.84 9.9 , 1.30 , -0.83 10 , 1.25 , -0.82 10.1 , 1.19 , -0.80 10.2 , 1.14 , -0.78 10.3 , 1.07 , -0.75 10.4 , 1.00 , -0.72 10.5 , 0.92 , -0.67 10.6 , 0.83 , -0.61 10.7 , 0.73 , -0.54 10.85 , 0.52 , -0.40 10.95 , 0.30 , -0.23 11.00 , 0.00 , -0.00
Thanks a lot. A did a quick hand plot on a sheet of drawing paper, it looks really good, I really like that rocker curve ! Now that I understand a bit more about V, I think I’ll just keep the whole thing flat, to reduce drag and make it easier to shape. I’m not into radical moves and I figure if the board is smaller than what I’m used to and if I get some rather hard rails and a fin a bit forward, I should be fine … Once I find a good (and free) CAD program where I can easily input numbers to get a curve and also draw curves and get the numbers then I’ll work on the shape you gave me (experiment slight changes, optimize numbers according to my building technic and material …). I plan on shaping the board in may or june (I first want to wait and see how the balsa/EPS one I just built behaves : strength, flex …), and of course I’ll let you know on what I finally settle for. Again, thanks for you help. Pierre
I like flat (across) tails on midsize boards. They are small enough to turn without any V. A flat tail is faster to paddle, and will get you into more waves. I use Turbocad 3D Pro Version 7. It has Bezier curves which are the best for surfboard design. I think the upgrade, TC Pro version 8, costs about $150.00 US. You can find them at http://www.turbocad.com/ The site has a free downloadable 2D CAD program, and a free 15 day trial version of TC V7 (no “Pro”). Some of those trial software programs merely require you to reset your computer clock in order to use them after the expiration date. Good luck.>>> Thanks a lot. A did a quick hand plot on a sheet of drawing paper, it > looks really good, I really like that rocker curve !>>> Now that I understand a bit more about V, I think I’ll just keep the whole > thing flat, to reduce drag and make it easier to shape. I’m not into > radical moves and I figure if the board is smaller than what I’m used to > and if I get some rather hard rails and a fin a bit forward, I should be > fine …>>> Once I find a good (and free) CAD program where I can easily input numbers > to get a curve and also draw curves and get the numbers then I’ll work on > the shape you gave me (experiment slight changes, optimize numbers > according to my building technic and material …).>>> I plan on shaping the board in may or june (I first want to wait and see > how the balsa/EPS one I just built behaves : strength, flex …), and of > course I’ll let you know on what I finally settle for.>>> Again, thanks for you help.>>> Pierre