Islander 36 Differences Table

This table was developed in 2010 to record many of the known differences among Islander 36s to inform a discussion on our one-design measurement rules, and to explain why there is a rather large range of weights (perhaps 2,000 lbs) among Islanders. If anyone would like to submit significant additions, send them to: webmaster@islander36.org

 F = Factory installed or owner option when built

A = After-built changes

F/A	Area or Item	Estimated Result or range of differences
	Hull & Deck
F	Unplanned variation in lay-up from keel stub to gunnels.	Weight differences of up to 1100 lbs
F	Most I36s have fiberglass liners some do not.	Weight differences 450 lbs
A	Some have had reinforcement for “Smile” crack	Configuration difference up to ¼”
A	Some have had “Peel” jobs for blisters	Possible negative or positive shape & weight change
F	80s used a new deck mold	Weight distribution & windage vary
F	Metal toe-rails may, or may not, go forward to the bow	Weight distribution & forward stiffness vary
F&A	Number of deck hatches varies from 1 to 3	Weight distribution & windage vary
F	Some with and without molded anchor locker	Weight distribution varies
	Keel
F	There are lead and iron keels and 4 different attachment methods.	Center of gravity differs by 10 inches
F	Many keels had asymmetrical distortions up to ¾”, others did not.	Drag & lift vary
A	Keel shortened and Bulb added http://islander36.org/boatpics/shillelagh/shillelagh.html (Bottom of page.)	Center of gravity, drag and lift vary
	Link to keel pictures: http://islander36.org/keels/keels.html
	Spars & Rigging
F	Masts vary in weight, modulus, taper, step support and truck size.	Heeling moment and stiffness vary;
F/A	Some masts are “tall rig”	Heeling moment and stiffness vary; height +2’ for Tall Rig
F/A	Booms vary in weight,stiffness, and sheet attachment	Weight distribution & mainsail shape
F/A	Vangs vary in type and weight	Weight differences of up to 20 lbs
A	Spinnaker Poles of varying materials – aluminum & carbon fiber	Weight differences of up to 15 lbs
A	At least one boat has a single spreader rig	Weight distribution & difference up to 5 lbs
F/A	Size of rigging , type backstay vary.	Stretch, sag, weight and windage are different
F/A	Backstay adjustment S: none, hydraulic, tackle and mechanical	Weight differences of up to 20 lbs
F/A	May have double jib and spinnaker halyards	Weight difference s of up to 10 lbs
A	May have all line or wire rope halyards	Weight difference s of up to 10 lbs
	Engine
F/A	Type varies: at 5/2010, 30 types with 27 – 50 horsepower	Weights vary
F/A	Example: Palmer P-60 at 304 lbs; Perkins 4-108 & Westerbeke at a trim 590 lbs	Weight difference of 286 lbs
F/A	Type, weight, location vary	250 lb moved 2 feet change trim and heeling
F	Prop shaft may be in-line with keel or offset 10 deg.	Drag varies
	Exterior Gear
F/A	Most boats have steering wheels, some have tillers	Weight differences of up to 100 lbs
	Tiller boats have the skipper’s weight up to 3 ‘ forward	Pitching moment improved
A	Some boats have equipment arch and / or radar mast & radar	Weight differences of up to 100 lbs
F/A	Some boats have anchor rollers & anchors forward, some do not	Weight differences and pitching moment varies
A	Some boats have anchor windlasses and some do not	Weight differences and pitching moment varies
F	Some boats have molded-in anchor lockers, some do not	Weight differences and pitching moment varies
F/A	Some boats have chain anchor rode, some rope, some both	Weight differences and pitching moment varies
F/A	Some boats have fold-down stern ladders, others do not	Weight differences and pitching moment varies
F/A	Number and size of winches, tracks and blocks varies	Weight differences of up to 100 lbs
	Interior Gear
F/A	Water, fuel & holding tanks vary in size and weight	Weight differences of up to 150 lbs
	No requirements on how much water or fuel to carry	Weight differences of up to 600 lbs
F/A	Bunks, cabinets, head, sole, steps, vary in size and location.	Weight & pitching vary
F/A	Stoves include alcohol, propane & CNG with different tankage & equipment	Weight & pitching vary
F/A	A few boats do not have stoves	Weight differences of up to 80 lbs
F/A	Some boats have pressure water systems, some do not	Weight & pitching vary
F/A	Some boats have hot water systems, some do not	Weight & pitching vary
F/A	Some boats have refrigeration systems, some do not	Weight & pitching vary
F/A	Navigation systems & equipment vary	Weight & pitching vary
F/A	Entertainment systems vary (stereo, radio & TV)	Weight & pitching vary