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Dimensions of San juan .5 ton

Updated 10/25/2012

Selected Measurements for San juan .5 ton

BOAT
I
J
P
E
ISP
JSP
PY
EY
Disp
LWL
DRAFT
San juan .5 ton 38.5 12.5 34 9.5 0 0 0 0 0 0 0

Links to our Multi Vendor Used Sail Directory for San juan .5 ton

Other Data Base Entries for san juan *

Click on boat nane to use
BOAT   I J P E ISP SPL PY PELWLDRAFTDISP
SAN JUAN .5 TON   38.5 12.5 34 9.5
San Juan 21 20 8 23 8.8 170.71250
SAN JUAN 21 20 8 23 8.8 17.541250
SAN JUAN 21 Mk 1 20 8 23 8.8
SAN JUAN 21 Mk 2 22.5 8 23 8.8
San Juan 21 Odr 20 8 23 8.8 170.71250
SAN JUAN 21-1 20 8 23 8.8 20 8
San Juan 21-2 20 8 23 8.8 170.71250
SAN JUAN 21-2 20 8 23 8.8 1741250
SAN JUAN 21-2 20 8 23 8.8 20 8
San Juan 21-2 Tm 25 8 23 8.8 170.71250
SAN JUAN 21-2 TM 25 8 23 8.8 25 8
San Juan 23 28 9.5 24 8.8 20.331.92700
SAN JUAN 23 28 9.5 24 8.8 20.334.75 2700
SAN JUAN 23 28 9.5 24 8.8 28 9.5
SAN JUAN 23 Mk 1 28 9.5 24 8.8
SAN JUAN 23 Mk 2 30 9.5 26 9.5
SAN JUAN 23-2 30 9.5 26 9.5 20.334.32900
San Juan 23-2 30 9.5 26 9.5 20.334.32900
SAN JUAN 23-2 30 9.5 26 9.5 30 9.5
SAN JUAN 24 30 9.5 26 8
SAN JUAN 24 30 9.5 26 8 19.543200
San Juan 24 30 9.5 26 8 19.543200
SAN JUAN 24 30 9.5 26 8 30 9.5
San Juan 24 Ib 30 9.5 26 8 19.54
SAN JUAN 25.3 ( 7.7 ) 27.8 9.5 30 11
SAN JUAN 26 30 10.5 26 9
San Juan 26 30.3 10 26 8 21.332.34400
SAN JUAN 26 30.3 10 26 8 21.6754400
SAN JUAN 26 30.3 10 26 8 30.3 10
SAN JUAN 28 37.75 12 33 9.5 22.334.5 6200
SAN JUAN 28 37.8 12 33 9.5
San Juan 28 37.8 12 33 9.5 22.334.56200
SAN JUAN 28 37.8 12 33 9.5 37.8 12
SAN JUAN 29 37.75 12 33 9.5 22.334.5 6200
SAN JUAN 30 38.5 12.5 34 9.5
SAN JUAN 30 38.5 12.5 34 9.5 23.675.37200
San Juan 30 38.5 12.5 34 9.5 23.675.37200
SAN JUAN 30 38.5 12.5 34 9.5 38.5 12.5
SAN JUAN 30 DK 38.5 12.5 34 9.5 23.676 7200
San Juan 30 Dk 38.5 12.5 34 9.5 23.6767200
SAN JUAN 30 DK 38.5 12.5 34 9.5 38.5 12.5
SAN JUAN 30 Tall rig 39.5 12.5 35 9.5
SAN JUAN 30 TM 39.5 12.5 35 9.5 23.675.37200
San Juan 30 Tm 39.5 12.5 35 9.5 23.675.37200
SAN JUAN 30 TM 39.5 12.5 35 9.5 39.5 12.5
SAN JUAN 33 35 11.5 40 13.5
San Juan 33s 35 11.5 40 13.5 27.755.95700
SAN JUAN 33S 35 11.5 40 13.5 35 11.5
SAN JUAN 33S 35.1 11.48 40.03 13.12 12 27.85.5 5700
San Juan 33s Sail Drive 35 11.5 40 13.5 27.755.95700
SAN JUAN 34 45.25 14.75 39.5 11 27.925.92 10500
SAN JUAN 34 45.3 14.8 39 11
San Juan 34 45.3 14.8 39.5 11 27.926.310500
SAN JUAN 34 45.3 14.8 39.5 11 45.3 14.8
SAN JUAN 34 SD 45.25 14.66 39.5 11 27.925.25 12500
San Juan 34 Sd 45.3 14.8 39.5 11 27.925.2512500
SAN JUAN 34 SD 45.3 14.8 39.5 11 45.3 14.8
SAN JUAN 34 Tall rig 46.5 14.8 39.5 11
SAN JUAN 34 TM 46.5 14.66 39.5 11 27.926.3 10500
San Juan 34 Tm 46.5 14.8 39.5 11 27.926.310500
SAN JUAN 34 TM 46.5 14.8 39.5 11 46.5 14.8
SAN JUAN 7.7 27.75 9.5 30 11 204 3200
San Juan 7.7 27.8 9.5 30 11 2043200
SAN JUAN 7.7 27.8 9.5 30 11 27.8 9.5
San Juan 7.7 Dk 27.8 9.5 30 11 20
San Juan 7.7 Ib 27.8 9.5 30 11 204
San Juan 7.7 Sail Drive 27.8 9.5 30 11 204
San Juan 7.7 Sd 27.8 9.5 30 11 203.3
SAN JUAN 7.7 SD 27.8 9.5 30 11 27.8 9.5
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
San juan .5 ton 38.5 12.5 34 9.5 38.5 12.5 0 0 0 0 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 = 162 sq ft
Racing Mainsail (add 10%) = 178 sq ft

Genoa

155% Genoa = (( J x I ) / 2) x 1.65 = 397 sq ft
135% Genoa = (( J x I ) / 2) x 1.44 = 347 sq ft

Jib

  _______
LP of full fore triangle = ( I x J ) / √  I2 + J2 = 11.9
Jib size to fill fore triangle = 95%
100% Jib = ( I x J ) / 2 = 241 sq ft

A more accurate LP calculator is HERE

Spinnaker

Spinnaker Area = Max Luff x Max Girth x ( 70-85%) = 606 to 735 sq ft
"Square" Spinnaker Area = Max Luff x Max Girth) = 865 sq ft
AC Area = 721 sq ft
Maximum Luff (.95 * sqrt (JSP^2 + ISP^2) = 38.45 feet
Maximum Girth = 1.8 * JSP = 22.5 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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