Annapolis 44 is a 44′ 1″ / 13.4 m monohull sailboat designed by Robert G. Henry Jr. and Alfred E. Luders and built by Uniflite Inc. starting in 1963.
- Designers
- Robert G. Henry Jr.
- Alfred E. Luders
- Builder
- Uniflite Inc.
- Associations
- ?
- # Built
- ?
- Hull
- Monohull
- Keel
- Long
- Rudder
- ?
- Construction
- Wood/FG
Dimensions
- Length Overall
- 44′ 1″ / 13.4 m
- Waterline Length
- 29′ 11″ / 9.1 m
- Beam
- 10′ 11″ / 3.4 m
- Draft
- 6′ 0″ / 1.8 m
- Displacement
- 22,500 lb / 10,206 kg
- Ballast
- 10,000 lb / 4,536 kg (Lead)
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 788′² / 73.2 m²
- Total Sail Area
- 788′² / 73.2 m²
Mainsail
- Sail Area
- 398′² / 36.9 m²
- P
- 43′ 8″ / 13.3 m
- E
- 18′ 2″ / 5.6 m
- Air Draft
- ?
Foresail
- Sail Area
- 390′² / 36.3 m²
- I
- 48′ 9″ / 14.9 m
- J
- 16′ 0″ / 4.9 m
- Forestay Length
- 51′ 4″ / 15.7 m
Auxilary Power
- Make
- Perkins
- Model
- 4-107
- HP
- ?
- Fuel Type
- Diesel
- Fuel Capacity
- ?
Accomodations
- Water Capacity
- ?
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- ?
Calculations
- Hull Speed
-
7.2 kn
Classic: 7.34 kn
Hull Speed
The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.
Formula
Classic hull speed formula:
Hull Speed = 1.34 x √LWL
A more accurate formula devised by Dave Gerr in The Propeller Handbook replaces the Speed/Length ratio constant of 1.34 with a calculation based on the Displacement/Length ratio.
Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio.311
Hull Speed = Max Speed/Length ratio x √LWL
- Sail Area/Displacement
-
15.8
<16: under powered
Sail Area / Displacement Ratio
A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.
Formula
SA/D = SA ÷ (D ÷ 64)2/3
- SA: Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
- D: Displacement in pounds.
- Ballast/Displacement
-
44.4
>40: stiffer, more powerful
Ballast / Displacement Ratio
A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.
Formula
Ballast / Displacement * 100
- Displacement/Length
-
372.5
300-400: heavy
Displacement / Length Ratio
A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.
Formula
D/L = (D ÷ 2240) ÷ (0.01 x LWL)³
- D: Displacement of the boat in pounds.
- LWL: Waterline length in feet
- Comfort Ratio
-
41.4
40-50: heavy bluewater boat
Comfort Ratio
This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.
Formula
Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam1.33)
- D: Displacement of the boat in pounds
- LWL: Waterline length in feet
- LOA: Length overall in feet
- Beam: Width of boat at the widest point in feet
- Capsize Screening
-
1.6
<2.0: better suited for ocean passages
Capsize Screening Formula
This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.
Formula
CSV = Beam ÷ ³√(D / 64)
- Beam: Width of boat at the widest point in feet
- D: Displacement of the boat in pounds
Notes
Available as sloop or yawl. Some were built for the US Navy as training vessels. Uniflite was one of the earliest builders of semi-production fiberglass sailing yachts.
Naval Architect Robert Henry Jr., an employee of the Naval Academy at the time, did the drawings for the fiberglass conversion.
Thanks to Cliff Bisch for providing the following commentary:
“The first f/g Annapolis 44s were built from 1963 to 1967 by Unflite. They had a very labor intensive hull to deck joint which makes the design, as built, nearly impervious to leaks, but not commercially viable.
The molds languished in the Bellingham yard until Cliff Bisch spotted them in 1980. He told Jim Gray, of Bellevue, Washington who purchased them, restored the surfaces and pulled 3 more hull and deck combinations out of them. One was shown at the 1983 Seattle Boat Show, with hopes of a production run. That did not materialize and only one boat was completed. It was on the resale market in 2011, in Vancouver, B.C. The first unfinished hull and deck languished in Renton, Wa until 1993, when Jim and Devon Surgent purchased them and brought the boat to an excellent level of completion. Externally, this boat has a wood cap rail as opposed to the bare fiberglass gunnels of the original fiberglass production boats, including Jim Gray’s #1 hull.
Bill Luders added 200 lbs of lead to the keel on the Gray boats and moved it slightly forward to improve the balance of the helm.”
