James Douglass22-Nov-10 Sailor Weight (lbs): (1 kg = 2.2 lbs)Sail Size Calculator Sailor Weight (kg): 0

Instructions: Enter your weight in a yellow highlighted box. Lbs will be converted to kg, or you can put in kg directlyTo enter a wind speed not listed, use a green highlighted boxTo enter a sail size not listed, use the pink highlighted box

Notes: Recommendations are for comfortable planing on an appropriately-sized shortboard. Beginner recommendations are NOT sufficient for planing- if you're trying to learn to plane, use the normal recommendations.Sail range may extend slightly below and well above these recommendations, especially for skilled ridersPlaning is not possible below 6 knots and sails > 12.5 are not commercially available.

Wind Sail Size Sail Size Wind

kts mph kmph mph kts kmph4 5 7 0.00 12.5 0.0 0.0 0.06 7 11 0.00 11.4 0.0 0.0 0.08 9 15 0.00 10.4 0.0 0.0 0.0

10 12 19 0.00 9.4 0.0 0.0 0.012 14 22 0.00 8.6 0.0 0.0 0.014 16 26 0.00 7.8 0.0 0.0 0.016 18 30 0.00 7.1 0.0 0.0 0.018 21 33 0.00 6.4 0.0 0.0 0.020 23 37 0.00 5.8 0.0 0.0 0.022 25 41 0.00 5.3 0.0 0.0 0.024 28 44 0.00 4.8 0.0 0.0 0.026 30 48 0.00 4.4 0.0 0.0 0.028 32 52 0.00 4.0 0.0 0.0 0.030 35 56 0.00 3.6 0.0 0.0 0.032 37 59 0.00 3.3 0.0 0.0 0.034 39 63 0.00 3.0 0.0 0.0 0.036 41 67 0.00 #DIV/0! #DIV/0! #DIV/0!38 44 70 0.0040 46 74 0.00

#DIV/0!#DIV/0!#DIV/0!

Beginner's Version

Wind Sail Size

kts mph kmph4 5 7 0.006 7 11 0.008 9 15 0.00

10 12 19 0.0012 14 22 0.00

m2 m2

m2

0 5 10 15 20 25 30 35 400.01.02.03.04.05.06.07.08.09.0

10.011.012.0

Ideal Sail Size vs. Wind Speed

Shortboard

Beginner

Wind Speed (Knots)

Sa

il S

ize

(m

^2

)

14 16 26 0.0016 18 30 0.0018 21 33 0.0020 23 37 0.0022 25 41 0.0024 28 44 0.0026 30 48 0.0028 32 52 0.0030 35 56 0.00

Questions? Comments? Contact James via his website-

Beginner recommendations are NOT sufficient for planing- if you're trying to learn to plane, use the normal recommendations.

http://jimbodouglass.blogspot.com

0 5 10 15 20 25 30 35 400.01.02.03.04.05.06.07.08.09.0

10.011.012.0

Ideal Sail Size vs. Wind Speed

Shortboard

Beginner

Wind Speed (Knots)

Sa

il S

ize

(m

^2

)

James Douglass22-Nov-10 Sailor Weight (lbs):Board Size Calculator Sailor Weight (kg): 0

Instructions:Enter your weight in a yellow highlighted box. Lbs will be converted to kg, or you can put in kg directly

Notes:It's ok for beginner boards, cruising longboards, and first shortboards to be bigger.Length and width recommendations should be interpreted loosely.

Volume Width LengthBoard Desired (Liters) (cm) (cm) Daggerboard?Beginner Board 22 56 220 YesCruising Longboard 90 50 265 YesFirst Shortboard 30 46 215 NoMinimum Size Uphaulable 30 44 200 NoModerate Sinker 7 47 197 NoSerious Sinker 7 47 194 NoRadical Sinker 6 44 190 No

(1 kg = 2.2 lbs)

James Douglass22-Nov-10Fin Size Calculator

Instructions:Enter sail size in the green highlighted box. Enter "1"s in the appropriate pink boxes if you wish those factors taken into account.

Notes: Generally, fins should not be longer than the width of the board under the back footstrap(s), or shorter than about 2/3 that distance.If you can't find a big enough wave fin, use a low aspect ratio freeride fin in the size recommended for waveFor weed-wave style fins, use the size recommendations for wave fins, not weed fins

Heavy Footed?Efficient?Underpowered?Powered up?

Fin Type or Board Type Fin Depth (cm) CommentsFreeride / Slalom 3 0Wave 7 Formula 36 Use 60 cmWeed 1 Longboard 17

Sail Size (m2):

Fin area (cm2)

Generally, fins should not be longer than the width of the board under the back footstrap(s), or shorter than about 2/3 that distance.