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Dimensions of Irwin 37-3 cb kth

Updated 10/25/2012

Selected Measurements for Irwin 37-3 cb kth

BOAT
I
J
P
E
ISP
JSP
PY
EY
Disp
LWL
DRAFT
Irwin 37-3 cb kth 42 17.6 35.6 12.9 0 0 22.16 0 20000 30 8

Links to our Multi Vendor Used Sail Directory for Irwin 37-3 cb kth

Other Data Base Entries for irwin 37*

Click on boat nane to use
BOAT   I J P E ISP SPL PY PELWLDRAFTDISP
IRWIN 37 1 TON   48 15.7 42.5 11.8 306.3 15400
IRWIN 37 COMPETITION 48 15.7 42.5 11.8 306.25 15500
IRWIN 37 KETCH 42 17.5 35.6 12.6
IRWIN 37 Mk 1 42 14.3 35.5 14.5
IRWIN 37 Mk 3 42 17.5 35.5 12.5
IRWIN 37 ONE TON 48 15.7 42.5 11.8 48 15.7
Irwin 37 T 48 15.7 42.5 11.8 306.315400
IRWIN 37 Tall rig 48 15.7 42.5 11.9
IRWIN 37-1 42 14.3 35.5 14.5 305.518000
Irwin 37-1 42 14.3 35.5 14.5 305.518000
Irwin 37-1 Cb 42 14.3 35.5 14.5 30420000
IRWIN 37-1 CB 42 14.3 35.5 14.5 8 30420000
IRWIN 37-1 CB 42 14.3 35.5 14.5 42 14.3
IRWIN 37-1 KETCH 42 13.8 35.5 13.8 42 13.8 20.8 8.8
IRWIN 37-1 SD 42 14.3 35.5 14.5 30420000
Irwin 37-1 Sd 42 14.3 35.5 14.5 30420000
IRWIN 37-1 SD 42 14.3 35.5 14.5 42 14.3
IRWIN 37-1ITA 42 14.3 35.5 14.5 42 14.3
IRWIN 37-2 42 17.5 35.5 12.5 30420000
Irwin 37-2 Cb 42 17.5 35.5 14.5 30420000
IRWIN 37-2 CB 42 17.5 35.5 14.5 42 17.5
Irwin 37-3 42 17.5 35.5 12.5 305.520000
IRWIN 37-3 42 17.6 35.6 14.6 304 20000
IRWIN 37-3 CB 42 17.5 35.5 12.5 42 17.5 22.5 8.7
Irwin 37-3 Cb Kth 42 17.5 35.5 12.5 30420000
IRWIN 37-3 CB KTH 42 17.6 35.6 12.9 22.16 308 20000
IRWIN 37-3 SD 42 17.5 35.5 12.5 30420000
Irwin 37-3 Sd 42 17.5 35.5 12.5 30420000
IRWIN 37-3 SD 42 17.5 35.5 12.5 42 17.5 22.5 8.7
IRWIN 37-4 42 17.5 35.6 14.6 305.520000
Irwin 37-4 42 17.5 35.6 14.6 305.620000
IRWIN 37-4 SD KTH 42 17.5 35.6 12.5 304 20000
Irwin 37-4 Sd Kth 42 17.5 35.6 12.5 30420000
IRWIN 37-4/5 42 17.5 35.6 14.6 42 17.5
IRWIN 37-4/5 CB 42 17.5 35.6 14.6 42 17.5
IRWIN 37-4/5 SD 42 17.5 35.6 14.6 42 17.5
IRWIN 37-5 42 17.5 35.5 14.5 30420000
Irwin 37-5 K 42 17.5 35.6 12.5 305.620000
IRWIN 37-5 KTCH 42 17.5 35.5 12.75 22.16 30420000
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
Irwin 37-3 cb kth 42 17.6 35.6 12.9 42 17.6 22.16 0 20000 30 8

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 = 230 sq ft
Racing Mainsail (add 10%) = 253 sq ft

Genoa

155% Genoa = (( J x I ) / 2) x 1.65 = 610 sq ft
135% Genoa = (( J x I ) / 2) x 1.44 = 532 sq ft

Jib

  _______
LP of full fore triangle = ( I x J ) / √  I2 + J2 = 16.2
Jib size to fill fore triangle = 92%
100% Jib = ( I x J ) / 2 = 370 sq ft

A more accurate LP calculator is HERE

Spinnaker

Spinnaker Area = Max Luff x Max Girth x ( 70-85%) = 959 to 1165 sq ft
"Square" Spinnaker Area = Max Luff x Max Girth) = 1370 sq ft
AC Area = 1142 sq ft
Maximum Luff (.95 * sqrt (JSP^2 + ISP^2) = 43.26 feet
Maximum Girth = 1.8 * JSP = 31.68 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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