The Allied Princess 36 Mk 2
 Sailboat

The Allied Princess 36, a long-keeled ketch, was designed by Arthur Edmunds and built in the USA by Allied Yachts.

The Allied Seawind 36 MkII ketch under full sail'Gabriel', an Allied Seawind 36 MkII ketch under full sail.

The MkII was introduced in 1980, distinguishing itself from the earlier version by the addition of a bowsprit. Both versions were available as either cutters or ketches.

Published Specification for the Allied Princess 36 MkII

Underwater Profile: Long keel.

Hull Material: GRP (Fiberglass)

Length Overall: 37'7" / 11.5m

Waterline Length: 27'6" / 8.4m

Beam: 11'0" / 3.4m

Draft: 5'1" / 1.6m

Rig Type: Masthead ketch

Displacement: 15,400lb / 6,985kg

Designer: Arthur Edmunds

Builder: Allied Yachts (USA)

Year First Built: 1972

Year Last Built: 1984

Number Built: 140+


Published Design Ratios for the Allied Princess 36 MkII

1. Sail Area/Displacement Ratio: 16.4

  • Less than 16 would be considered under-powered;
  • 16 to 20 would indicate reasonably good performance;
  • Over 20 suggests relatively high performance.

2. Ballast/Displacement Ratio: 34.7

  • Under 40: less stiff, less powerful
  • Over40: stiffer, more powerful

3. Displacement/Length Ratio: 309

  • Under 100: Ultralight
  • 100 to 200: Light
  • 200 to 275: Moderate
  • 275 to 350: Heavy
  • Over 350: Ultraheavy

4. Comfort Ratio: 30.4

  • Under 20 indicates a lightweight racing boat
  • 20 to 30 indicates a coastal cruiser
  • 30 to 40 indicates a moderate offshore cruising boat
  • 40 to 50 indicates a heavy offshore boat
  • Over 50 indicates an extremely heavy offshore boat

5. Capsize Screening Formula: 1.8

  • Under 2.0 (the lower the better): Better suited for ocean passages
  • Over 2.0: Less suited for ocean passages

read more about these all-revealing numbers...


Summary Analysis of the Design Ratios for the Allied Princess 36

1. A Sail Area/Displacement Ratio of 16.4 suggests that the Allied Princess 36 will, in the right conditions, approach her maximum hull speed readily and satisfy the sailing performance expectations of most cruising sailors.

2. A Ballast/Displacement Ratio of 34.7 means that the Allied Princess 36 will stand up well to her canvas in a blow, helping her to power through the waves.

3. A Displacement/Length Ratio of 309, tells us the Allied Princess 36 is clearly a heavy displacement cruising boat. You can load her down with all your cruising gear and equipment and it will hardly affect her waterline. Not an ideal choice for coastal sailing, but she'll come into her own on an offshore passage in testing conditions.

4. Ted Brewer's Comfort Ratio of 30.4 suggests that crew comfort of a Allied Princess 36 in a seaway is similar to what you would associate with the motion of a moderate bluewater cruising boat - a predictable and acceptable motion for most seasoned sailors.

5. The Capsize Screening Formula (CSF) of 1.8 tells us that a Allied Princess 36 would be a safer choice of sailboat for an ocean passage than one with a CSF of more than 2.0. 

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