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Dimensions of Ds-20

Updated 10/25/2012

Selected Measurements for Ds-20

BOAT
I
J
P
E
ISP
JSP
PY
EY
Disp
LWL
DRAFT
Ds-20 17.8 8.3 20.6 9.3 0 0 0 0 1850 18.07 0

Links to our Multi Vendor Used Sail Directory for Ds-20

Other Data Base Entries for ds*

Click on boat nane to use
BOAT   I J P E ISP SPL PY PELWLDRAFTDISP
Bowman 48 Ds   61.5 18.5 53.8 17.7 38.2634330
Buzzards Bay 19 8.5 21 19 152125
Buzzards Bay 14 16.65 6 18.58 11 142000
Buzzards Bay 25 27.5 11 18.5 21.75 257600
Cape Dory Typhoon DS   21.9 6.9 20 8 21.9 6.9
Cheoy Lee Midship 40 44.3 14.8 38 14 32.54.520000
Cheoy Lee Midshipman 36 40 13.3 34 17.3 40 13.3
Cheoy Lee Midshipman 40 44.3 14.8 38 14 44.3 14.8 27 10
DAVIDSON 29   42.5 12 37.5 13.08 26.2567100
Davidson 29 42.5 12.5 37.5 13.83 26.2566000
DAVIDSON 30 38 11.9 33 13.8
Davidson 30 38 12 33 13.8 27.25.94500
DAVIDSON 30 38 12 33 13.8 38 12
DAVIDSON 40 47.2 14 51.8 20
Davidson 40-1 46.5 13.67 5 18.33 33.337.2514500
Davidson 44 50 15.3 57 20.6 367.517000
DAVIDSON 44 52.4 15.4 56.5 20.5
Dehler 41 Ds 52.82 14.93 52.17 17.72 36.255.1318302
Dehler 41 Ds Sd 52.82 14.75 52.17 17.72 5.5219621
DEHLER 41DS 52.8 14.9 52.2 17.7 52.8 14.9
DEHLER 41DS SD 52.8 14.9 52.2 17.7 52.8 14.9
Ds 20 17.8 8.3 20.6 9.3 171800
DS 20 17.8 8.3 20.6 9.3 17.8 8.3
Ds 22 27 9.3 22.8 7.8 21.754.52400
DS 22 27 9.3 22.8 7.8 27 9.3
DS-20 17.8 8.3 20.6 9.3 18.07 1850
DS-22 27 9.3 22.8 7.8 18.54.52400
FAIR WINDS   51 15.8 45 15
FRIENDSHIP 22 23.2 18.1 23.1 7.9 18.54.263500
FRIENDSHIP 22 23.2 8.1 23.1 7.9 23.2 8.1
FRIENDSHIP 22 IB 23.2 18.1 23.1 7.9
Friendship 22 Ib 23.2 18.1 23.1 7.9 18.54.63500
FRIENDSHIP 25 TS 25.1 8.37 29.04 9.84 214.76 2866
Friendship 30 31.5 12 33 9.58 23255.57500
Friendship 40 54.16 17.16 52.16 17.16 30.253.9222500
HUNTER 41 DS   51.57 12.99 48.62 18.24 34.846.5 19400
HUNTER 426 DS 47.92 14.67 46.5 20.75 39.186.522936
Hunter 44 Ds Sd 47.9 14.7 50 20.8 39.17522936
HUNTER 45 DS 47.93 14.67 46.49 20.73 39.176.522937
Jeanneau 35.1 SUN ODSY   41.3 11.8 36.1 14.4 41.3 11.8
Jeanneau 35.1 SUN ODSY S 41.3 11.8 36.1 14.4 41.3 11.8
Jeanneau 40.3 Sun Ody Ds 50 13.75 43.25 15.67 33.334.9218254
Jeanneau 42 Sun Od Ds 51.57 15.92 49.92 16 386.9218083
Jeanneau 42 Sun Od Ds Sd 51.67 15.92 49.92 16 385.1718083
Jeanneau 43 Sun Odyss Ds 51.7 15.3 45.1 16.3 37.45.220503
Jeanneau 54 Sun Odyss Ds 65.75 19.33 57.92 19.17 48.57.537479
LUGER 26 Tradewinds   29.3 10.2 23 10.3 29.3 10.2
LUGER 27 FAIRWINDS 22 8 24.3 10
MIDSHIP 25   29.5 10.75 24.42 9 22.145.183500
Midship 25 29.5 10.75 24.42 9 29.5 10.75
MIDSHIPMAN 40 (CHEOY LEE) 44.25 14.8 38 14 27 32.54.520000
MOODY 45DS 60.69 17.13 60.37 19.68 42.426.53 29983
MOODY 62 DS 82.02 22.97 76.11 27.89 56.438.266138
OFFSHORE 32 (RICHARDS)   41 12.8 36.3 12.1 274.511400
S-2 5.5 GRANDSLAM   19.5 6 23.5 10
S-2 6.7 GRANDSLAM 24.5 7.5 26 10.3
S-2 7.9 GRANDSLAM 30.5 9.5 29.4 12.3
S2 8.0B SDSDS 29.8 11.5 26.1 9 29.8 11.5
S2 8.0B TMSDS 32.3 12.4 27.8 10 32.3 12.4
S2 8.0C SDSDS 30.3 11.5 26.1 9 30.3 11.5
SANDSTREAM 20.0 20.5 7 20.3 6.6
SANDSTREAM 22.0 26 9 25.4 8.9
SANDSTREAM 26.0 33.1 10.6 28 9.6
SANDSTREAM 28.0 37 10.8 32 10.3
SHIELDS 29.88 9.33 33.38 13.38 204.75 4600
SHIELDS 29.9 9.3 33.4 13.4 29.9 9.3
Shields Odr 29.88 9.33 33.38 13.38 204.754600
SHIELDS ODR 29.9 9.3 33.4 13.4
SUN ODYSSEY 39 DS (JEANNEAU) 48.33 13.83 47.08 15.92 35.166.58 17331
SUN ODYSSEY 39 DS PERF. (JEANNEAU) 51.67 13.83 49.25 15.92 35.166.58 17331
SUN ODYSSEY 40 DS (JEANNEAU) 49.75 13.92 42.83 15.75 30.336.42 15875
SUN ODYSSEY 43 DS (JEANNEAU) 50.8 15.29 44.49 17.06 37.56.56 21054
SUN ODYSSEY 45 DS (JEANNEAU) 54.26 15.26 50.1 17.39 37.576.73 22928
SUN ODYSSEY 49 DS (JEANNEAU) 55.77 18.63 51.67 17.72 42.327.0528000
SUN ODYSSEY 50 DS (JEANNEAU) 55.77 18.63 51.67 18.37 43.047.0529542
SUN ODYSSEY 54 DS (JEANNEAU) 66.08 19.35 59.92 19.19 48.56.5 37479
TRADEWINDS 26 (LUGER)   29.3 10.2 23 10.3 235.5 26000
TRADEWINDS 40 53.1 16.9 47 14.1
TRADEWINDS 65 0 0 32.9 11
WINDSHIP 72   83 35 76 26 83 35
WINDSHIP 80 90 29.5 81.5 28 6718.42115000
WINDSHIP 80 90 29.5 81.5 28 90 29.5
Click Here for other boat types or to check dimensions from other data bases. We now offer three data bases.

Sail Area Calculations

BOAT
I
J
P
E
ISP
JSP
PY
EY
Disp
LWL
DRAFT
Ds-20 17.8 8.3 20.6 9.3 17.8 8.3 0 0 1850 18.07 0

sailboat rig dimensions The following formulas are approximate
Sail areas depend on lots of factors, leach hollow, foot round, luff hollow etc. Also, remember that jib sail area in general is based on the forestay length, I. But all things considered, these numbers are close but should not be considered exact. They are rules of thumb, not measurements of a this specific boat.

Mainsail

Mainsail = (P x E) / 2 = 96 sq ft
Racing Mainsail (add 10%) = 106 sq ft

Genoa

155% Genoa = (( J x I ) / 2) x 1.65 = 122 sq ft
135% Genoa = (( J x I ) / 2) x 1.44 = 106 sq ft

Jib

  _______
LP of full fore triangle = ( I x J ) / √  I2 + J2 = 7.5
Jib size to fill fore triangle = 90%
100% Jib = ( I x J ) / 2 = 74 sq ft

A more accurate LP calculator is HERE

Spinnaker

Spinnaker Area = Max Luff x Max Girth x ( 70-85%) = 195 to 237 sq ft
"Square" Spinnaker Area = Max Luff x Max Girth) = 279 sq ft
AC Area = 232 sq ft
Maximum Luff (.95 * sqrt (JSP^2 + ISP^2) = 18.66 feet
Maximum Girth = 1.8 * JSP = 14.94 feet
Ref

DEFINITIONS

"P" is the luff length of the mainsail, measured along the aft face of the mast from the top of the boom to the highest point that the mainsail can be hoisted or black band.

"E" is the foot length of the mainsail, measured along the boom from the aft face of the mast to the outermost point on the boom to which the main can be pulled or to the black band.

"I" is measured along the front of mast from the genoa halyard to the main deck. The main deck is where the deck would be if there were no deckhouse.

"J" is the base of the foretriangle measured along the deck from the headstay pin to the front of the mast.

"JSP" is the length of the spinnaker pole or the distance from the forward end of the bowsprit (fully extended) to the front face of the mast.

"ISP" is measured from the highest spinnaker halyard to the deck.

"PY" and "EY" are, respectively the luff length and foot length of the mizzen of a yawl or ketch measured in the same way as for the mainsail.

"IY" is the measurement from the staysail halyard to the deck.

"JY" is the measurement from the staysail stay to the front face of the mast.

"LP" is the shortest distance between the clew and the luff of the genoa.

Data*

This data is supplied as a reference and all boat dimensions should be verified before using it in any critical application.
The information in these data bases is a starting point. There are errors as you can see as the different data bases do not always agree. In addition, some boats have been modified from stock and will not match the data in these databases. None of this data has been checked by L-36.com so please always check your boat before relying on this data.
Data is from a variety of sources.
db = SBD is used under the Creative Commons License sailboatdata.com (sailboatdata.com) / CC BY 3.0
db = PHRF is the PHRF Critical Dimensions database
db = WEB is the commonly available data found on many web sites
db = BIG is a combination of all of the above.

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