The **First 21.7** is a 20’6” (6.25m) cruiser-racer sailboat designed by *Finot Conq Architectes* (France). She was built between 2004 and 2008 by *Bénéteau* (France). The *Swing keel* version features an appendage configuration without compromise between draft and performance. The only drawbacks are the space is taken inside and the effort needed to lift the keel....

- Model
- First 21.7
- Version
- Swing keel
- Hull type
- Monohull
- Category
- Cruiser-racer sailboat
- Sailboat builder
- Sailboat designer
- Sailboat range
- Country
- France
- Construction
- GRP (glass reinforced polyester):

- Hull: Single skin fiberglass polyester

- Deck: Sandwich balsa fiberglass polyester - First built hull
- 2004
- Last built hull
- 2008
- Appendages
- Lifting keel : swing keel
- Helm
- Single tiller
- Rudder
- Twin spade rudders
- Unsinkable
- No
- Trailerable
- Yes
- 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 - C
- Former French navigation category
- 3
- Standard public price ex. VAT (indicative only)
- N/A €

- Overall length
- 21’6.4 m
- Hull length
- 20’ 6”6.25 m
- Waterline length
- 19’ 8”6 m
- Beam (width)
- 8’ 1”2.48 m
- Draft
- 5’ 11”1.8 m
- Draft when appendages up
- 2’ 4”0.7 m
- Mast height from D
_{WL} - 34’ 1”10.4 m
- Light displacement (M
_{LC}) - 2745 lb1245 kg
- Ballast weight
- 772 lb350 kg
- Ballast type
- Cast iron
- French customs tonnage
- 3.99 Tx

- Upwind sail area
- 271 ft²25.2 m²
- Downwind sail area
- 523 ft²48.57 m²
- Mainsail area
- 149 ft²13.8 m²
- Genoa area
- 123 ft²11.4 m²
- Symmetric spinnaker area
- 374 ft²34.77 m²
- I
*iFore triangle height (from mast foot to fore stay top attachment)* - 28’ 2”8.59 m
- J
*iFore triangle base (from mast foot to bottom of forestay)* - 7’ 11”2.4 m
- P
*iMainsail hoist measurement (from tack to head)* - 27’ 2”8.3 m
- E
*iMainsail foot measurement (from tack to clew)* - 9’ 5”2.85 m
- Rigging type
- Sloop Marconi 9/10
- Mast configuration
- Deck stepped mast
- Rotating spars
- No
- Number of levels of spreaders
- 1
- Spreaders angle
- Swept-back
- Spars construction
- Aluminum spars
- Standing rigging
- 1x19 strand wire continuous

- 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. - 234 ft²/T21.77 m²/T
- Downwind 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. - 452 ft²/T41.97 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. - 163
- 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. - 28 %
- 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. - 5.95 knots

- Engine(s)
- 1 outboard engine
- Engine(s) power
- 11 HP
- Fuel type
- Gas

- Cockpit
- Closed aft cockpit
- Berth(s)
- 4
- Freshwater tank capacity
- 9.2 gal35 liters
- Maximum headroom
- 4’ 10”1.45 m

- Berth length
- 7’ 2”2.2 m
- Berth width
- 2’0.6 m

- Berth length
- 6’ 2”1.9 m
- Berth width
- 4’ 7”1.4 m

Sailboats

First built hull

Hull length

1980

28’ 2”8.6 m

2012

27’ 5”8.35 m

1978

18’5.5 m

2013

20’ 6”6.25 m

2013

24’ 7”7.5 m

1995

21’ 6”6.55 m

2015

20’ 10”6.34 m

1986

21’ 7”6.57 m

2016

22’6.7 m

2002

27’ 2”8.3 m

1994

24’ 7”7.49 m

1979

24’ 10”7.55 m

1984

25’ 5”7.75 m

1997

31’ 2”9.5 m

1978

21’ 7”6.58 m