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Dimensions of Hm-27

Updated 10/25/2012

Selected Measurements for Hm-27

BOAT
I
J
P
E
ISP
JSP
PY
EY
Disp
LWL
DRAFT
Hm-27 37.5 11.25 32.5 11.5 0 0 0 0 7400 21.5 4.25

Links to our Multi Vendor Used Sail Directory for Hm-27

Other Data Base Entries for hm*

Click on boat nane to use
BOAT   I J P E ISP SPL PY PELWLDRAFTDISP
ALLMAND 23 (HMS 23)   24.33 10.4 20 8.75 19.832.5 3360
FLYING DUTCHMAN 12   57 22.2 52 16.5
Flying Dutchman 12 57 22.2 52 16.5 426.535175
FLYING DUTCHMAN 12 58.67 22.67 53.87 15.67 426.5 35175
FLYING DUTCHMAN 37 47.3 16.3 41.6 11.7
Flying Dutchman 37 47.3 16.3 41.6 11.7 29.075.716000
FLYING DUTCHMAN 37 47.3 16.3 41.6 11.7 29.076 16000
FLYING DUTCHMAN 37 47.3 16.3 41.6 11.7 47.3 16.3
FORMOSA 456HM 53.6 17.8 49.4 16.4 53.6 17.8
FORMOSA 466HM 53 19.3 47 17 53 19.3
HM-27   37.5 11.25 32.5 11.5 21.54.25 7400
MIRAGE 27 (SCHMIDT)   35.8 11.8 29.9 10.6 21.54.17 5500
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
Hm-27 37.5 11.25 32.5 11.5 37.5 11.25 0 0 7400 21.5 4.25

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 = 187 sq ft
Racing Mainsail (add 10%) = 206 sq ft

Genoa

155% Genoa = (( J x I ) / 2) x 1.65 = 348 sq ft
135% Genoa = (( J x I ) / 2) x 1.44 = 304 sq ft

Jib

  _______
LP of full fore triangle = ( I x J ) / √  I2 + J2 = 10.8
Jib size to fill fore triangle = 96%
100% Jib = ( I x J ) / 2 = 211 sq ft

A more accurate LP calculator is HERE

Spinnaker

Spinnaker Area = Max Luff x Max Girth x ( 70-85%) = 527 to 640 sq ft
"Square" Spinnaker Area = Max Luff x Max Girth) = 753 sq ft
AC Area = 628 sq ft
Maximum Luff (.95 * sqrt (JSP^2 + ISP^2) = 37.19 feet
Maximum Girth = 1.8 * JSP = 20.25 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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