Ericson 35-1 is a 34′ 8″ / 10.6 m monohull sailboat designed by Carl Alberg/Bruce King and built by Ericson Yachts between 1967 and 1969.
- Designer
- Carl Alberg/Bruce King
- Builder
- Ericson Yachts
- Associations
- ?
- # Built
- 45
- Hull
- Monohull
- Keel
- Long
- Rudder
- ?
- Construction
- FG
Dimensions
- Length Overall
- 34′ 8″ / 10.6 m
- Waterline Length
- 24′ 0″ / 7.3 m
- Beam
- 9′ 8″ / 3 m
- Draft
- 5′ 1″ / 1.6 m
- Displacement
- 12,000 lb / 5,443 kg
- Ballast
- 5,300 lb / 2,404 kg
Rig and Sails
- Type
- Sloop
- Reported Sail Area
- 544′² / 50.5 m²
- Total Sail Area
- 544′² / 50.5 m²
Mainsail
- Sail Area
- 288′² / 26.8 m²
- P
- 35′ 11″ / 11 m
- E
- 16′ 0″ / 4.9 m
- Air Draft
- ?
Foresail
- Sail Area
- 256′² / 23.8 m²
- I
- 41′ 7″ / 12.7 m
- J
- 12′ 3″ / 3.8 m
- Forestay Length
- 43′ 4″ / 13.2 m
Auxilary Power
- Make
- Universal
- Model
- Atomic 4
- HP
- 30
- Fuel Type
- Gas
- Fuel Capacity
- 26 gal / 98 l
Accomodations
- Water Capacity
- 33 gal / 125 l
- Holding Tank Capacity
- ?
- Headroom
- ?
- Cabins
- ?
Calculations
- Hull Speed
-
6.4 kn
Classic: 6.58 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
-
16.6
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
-
44.2
>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
-
383.6
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
-
32.8
30-40: moderate bluewater cruising 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
-
1.7
<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
There are a number of stories about the origins of the ERICSON 35-1. One has it that the molds for this, the first of all the Ericsons, were purchased from Pearson Yachts.
Another version is quoted below:
“Pearson Yachts decided to discontinue the manufacture of ALBERG 35’s at its Sausalito, CA plant. They sent the molds to the San Francisco dump where they weren’t broken up, supposedly because the crew stopped to eat lunch. Someone saw them, claimed them, and trucked them down to Orange where they set up a manufacturing facility. Bruce King redesigned the keel, taking out 500 pounds of ballast. He also redesigned the cabin trunk with windows with a shape similar to that of the Columbia’s of the period.
Pearson sued Ericson over the hull. They lost. Columbia sued Ericson over the window shape. They won. As a result, later windows had the same general shape but were split in two.”
The only thing that can be said for certain is that lines of the ERICSON 35-1 do appear similar to those of the ALBERG 35.
Another, completely different ERICSON 35 was introduced in 1969, designed by King. (Here referred to as the ERICSON 35-2).
