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Endeavour 40 Kth
 ·  Builder: Endeavour Yacht Corp.  ·  First built: 1981
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About the Endeavour 40 Kth

With limited documentation available, the Endeavour 40 Kth represents one of the more elusive models in the Endeavour sailboat lineage. This 40-foot yacht appears to be part of Endeavour's broader tradition of producing solid, well-built cruising sailboats that gained popularity among sailors seeking reliable performance without excessive complexity. Based on the Endeavour brand's established reputation during their active production years, this model likely features the company's characteristic emphasis on practical cruising design and sturdy construction. Endeavour boats were generally known for their spacious interiors, comfortable accommodations, and seaworthy hulls that handled coastal and offshore sailing with confidence. The "Kth" designation suggests this may have been a specific variant or limited production run, which could explain the scarcity of readily available information. For potential buyers researching this model, the boat would typically appeal to cruising sailors looking for a mid-sized yacht capable of extended coastal passages and comfortable live-aboard arrangements. Given the limited specifications currently documented, prospective owners should conduct thorough surveys and seek out owner communities or marine professionals familiar with Endeavour's construction methods and typical performance characteristics from this era.

Core Dimensions
LOA (Length Overall) 40.00 ft / 12.19 m
LWL (Waterline Length) 32.00 ft / 9.75 m
Beam 13.00 ft / 3.96 m
Max Draft 5.00 ft / 1.52 m
Displacement 25,000.00 lb / 11,340 kg
Ballast 9,000.00 lb / 4,082 kg
Sail Area (Reported) 852.00 ft² / 79.15 m²
Design & Construction
Hull Type Fin with rudder on skeg
Rigging Type Masthead Ketch
Construction FG
Builder Endeavour Yacht Corp.
First Built 1981
Owner Reviews

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Performance Ratios
PHRF Rating PHRF (Performance Handicap Racing Fleet) is a national racing handicap measured in seconds per nautical mile. Lower values indicate faster boats. Ratings are sourced from US Sailing's national database (median across 60+ regional fleets).
Under 0 — Ultralight racer0–90 — Performance racer90–150 — Cruiser/racer150–210 — Typical cruiserOver 210 — Heavy/slow cruiser
162
SA/Displacement Sail Area to Displacement ratio measures how much sail power a boat has relative to its weight. Higher values mean more performance and speed.
Under 14 — Heavy cruiser, slow14–18 — Cruising sailboat18–22 — Cruiser/racerOver 22 — Performance racer
16.01
Comfort Ratio Ted Brewer's Comfort Ratio predicts how comfortable a boat will feel in offshore conditions. Higher values mean a steadier, more comfortable motion in a seaway.
Under 20 — Uncomfortably rough20–30 — Acceptable coastal30–40 — Good offshore comfortOver 40 — Very comfortable offshore
36.89
Capsize Screening Formula The USHS Capsize Screening Formula estimates offshore capsize risk. Lower is safer — values under 2.0 are considered acceptable for offshore sailing.
Under 2.0 — Safe for offshore2.0–2.2 — Borderline offshoreOver 2.2 — Coastal use recommended
1.78
Hull Speed Hull Speed is the theoretical maximum speed of a displacement hull, calculated from waterline length. Most cruising sailboats reach this speed in moderate conditions. 7.58
S# (Speed Number) The Speed Number (S#) is a quick performance index. Higher values indicate a faster, more powerful design relative to its size.
Under 3.0 — Slow cruiser3.0–5.0 — Average cruiser5.0–7.0 — Performance cruiserOver 7.0 — Racer
1.26
Pounds/Inch Immersion Pounds per Inch Immersion (PPI) tells you how much weight is needed to sink the boat one inch. Useful for calculating how additional gear and stores affect waterline. 1.0
Rig Dimensions
I (Foretriangle Height) 50.78
J (Foretriangle Base) 15.86
P (Mainsail Luff) 43.66
E (Mainsail Foot) 15.75
SA Fore 402.69
SA Main 343.82
How It Compares

vs. Intrepid 40, Lancer 40, Tartan 40 Offshore

This boat Similar boats
Dimensions
LOA
Endeavour 40 Kth ★
40.0 ft
Intrepid 40
40.0 ft
Lancer 40
40.0 ft
Tartan 40 Offshore
40.0 ft
LWL
Endeavour 40 Kth ★
32.0 ft
Intrepid 40
32.8 ft
Lancer 40
33.7 ft
Tartan 40 Offshore
36.0 ft
Beam
Endeavour 40 Kth ★
13.0 ft
Intrepid 40
12.6 ft
Lancer 40
12.0 ft
Tartan 40 Offshore
13.3 ft
Displacement
Endeavour 40 Kth ★
25 lbs
Intrepid 40
20 lbs
Lancer 40
15 lbs
Tartan 40 Offshore
26 lbs
Ballast
Endeavour 40 Kth ★
9 lbs
Intrepid 40
7 lbs
Lancer 40
4 lbs
Tartan 40 Offshore
10 lbs
Sail Area
Endeavour 40 Kth ★
852 sq ft
Intrepid 40
749 sq ft
Lancer 40
689 sq ft
Tartan 40 Offshore
788 sq ft
Performance
PHRF Rating (lower = faster)
Endeavour 40 Kth ★
162 s/nm
Intrepid 40
125 s/nm
Lancer 40
Tartan 40 Offshore
SA / Displacement (higher = more powerful)
Endeavour 40 Kth ★
16.0
Intrepid 40
16.3
Lancer 40
17.8
Tartan 40 Offshore
14.4
Comfort Ratio (higher = more comfortable offshore)
Endeavour 40 Kth ★
36.9
Intrepid 40
30.5
Lancer 40
24.6
Tartan 40 Offshore
34.3
Capsize Screening (lower = safer)
Endeavour 40 Kth ★
1.78
Intrepid 40
1.86
Lancer 40
1.93
Tartan 40 Offshore
1.80
Hull Speed
Endeavour 40 Kth ★
7.6 kts
Intrepid 40
7.7 kts
Lancer 40
7.8 kts
Tartan 40 Offshore
8.0 kts
Speed Number (higher = faster)
Endeavour 40 Kth ★
1.3
Intrepid 40
2.1
Lancer 40
3.0
Tartan 40 Offshore
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