Detailed sailboat specifications and datasheets since 2015
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Delphia 47 Deep draft

Sailboat specifications

The Delphia 47 is a 46’7” (14.2m) cruising sailboat designed by Andrzej Skrzat (Poland). She was built between 2008 and 2019 by Delphia Yachts (Poland). The Deep draft version offers a deeper L-shaped keel bringing extra performance especially upwind.

The Delphia 47 is as well listed, on, in Shoal draft and Keel and centerboard version (see all the versions compared).

Delphia 47's main features

Delphia 47
Deep draft
Hull type
Cruising sailboat
Sailboat builder
Sailboat designer
GRP (glass reinforced polyester):
- Hull: Single skin fiberglass polyester (vacuum infusion)
- Deck: Sandwich PVC fiberglass polyester (vacuum infusion)
First built hull
Last built hull
Keel : L-shaped keel (with bulb)
Twin helm wheels
Single spade rudder
EC design category
 iThe CE design category indicates the ability to cope with certain weather conditions (the sailboat is designed for these conditions)

A: Wind < force 9, Waves < 10m
B: Wind < force 8, Waves < 8m
C: Wind < force 6, Waves < 4m
D: Wind < force 4, Waves < 0,5m
Standard public price ex. VAT (indicative only)
214 000

Delphia 47's main dimensions

Overall length
47’ 6”14.48 m
Hull length
46’ 7”14.2 m
Waterline length
42’ 2”12.86 m
Beam (width)
14’ 8”4.48 m
7’ 6”2.3 m
Mast height from DWL
67’ 1”20.45 m
Light displacement (MLC)
29762 lb13500 kg
Ballast weight
9921 lb4500 kg

Delphia 47's rig and sails

Upwind sail area
1207 ft²112.1 m²
Mainsail area
593 ft²55.1 m²
Genoa area
614 ft²57 m²
Rigging type
Sloop Marconi 9/10
Mast configuration
Deck stepped mast
Rotating spars
Number of levels of spreaders
Spreaders angle
Spars construction
Aluminum spars

Delphia 47's performances

Upwind sail area to displacement
 iThe ratio sail area to displacement is obtained by dividing the sail area by the boat's displaced volume to the power two-thirds.

The ratio sail area to displacement can be used to compare the relative sail plan of different sailboats no matter what their size.

Upwind: under 18 the ratio indicates a cruise oriented sailboat with limited performances especially in light wind, while over 25 it indicates a fast sailboat.
213 ft²/T19.77 m²/T
Displacement-length ratio (DLR)
 iThe Displacement Length Ratio (DLR) is a figure that points out the boat's weight compared to its waterline length. The DLR is obtained by dividing the boat's displacement in tons by the cube of one one-hundredth of the waterline length (in feet).
The DLR can be used to compare the relative mass of different sailboats no matter what their length:

a DLR less than 180 is indicative of a really light sailboat (race boat made for planning), while a DLR greater than 300 is indicative of a heavy cruising sailboat.
Ballast ratio
 iThe Ballast ratio is an indicator of stability; it is obtained by dividing the boat's displacement by the mass of the ballast. Since the stability depends also of the hull shapes and the position of the center of gravity, only the boats with similar ballast arrangements and hull shapes should be compared.

The higher the ballast ratio is, the greater is the stability.
33 %
Critical hull speed
 iAs a ship moves in the water, it creates standing waves that oppose its movement. This effect increases dramatically the resistance when the boat reaches a speed-length ratio (speed-length ratio is the ratio between the speed in knots and the square root of the waterline length in feet) of about 1.2 (corresponding to a Froude Number of 0.35) . This very sharp rise in resistance, between speed-length ratio of 1.2 to 1.5, is insurmountable for heavy sailboats and so becomes an apparent barrier. This leads to the concept of "hull speed".
The hull speed is obtained by multiplying the square root of the waterline length (in feet) by 1.34.
8.70 knots

Delphia 47's auxiliary engine

1 inboard engine
Engine(s) power
75 HP
Fuel type
Fuel tank capacity
66 gal250 liters

Delphia 47's accommodations and layout

Closed aft cockpit
Cabin(s) (min./max.)
3 / 5
Berth(s) (min./max.)
6 / 12
Head(s) (min./max.)
2 / 4
Freshwater tank capacity
129.4 gal490 liters
Holding tank capacity
37.2 gal141 liters
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