Detailed sailboat specifications and datasheets since 2015
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M 7.50

Sailboat specifications

The M 7.50 is a 24’7” (7.5m) sport keel boat designed by Gilles Bréteché (France). She was built between 2015 and 2017 by BG Race (France).

The M 7.50 has also been marketed as Monotype 7.50.

M 7.50's main features

Model
M 7.50
Hull type
Monohull
Category
Sport keel boat
Sailboat builder
Sailboat designer
Country
France
Construction
GRP (glass reinforced polyester):
Sandwich fiberglass polyester
First built hull
2015
Last built hull
2017
Appendages
Keel : fin without bulb
Helm
Single tiller
Rudder
Single spade rudder
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
Standard public price ex. VAT (indicative only)
About 
30 200
 (2017)

M 7.50's main dimensions

Hull length
24’ 7”7.5 m
Waterline length
22’ 6”6.85 m
Beam (width)
6’ 1”1.86 m
Waterline beam (width)
5’ 2”1.6 m
Draft
4’1.22 m
Mast height from DWL
34’ 8”10.58 m
Fore freeboard
2’ 2”0.68 m
Light displacement (MLC)
1764 lb800 kg
Ballast weight
1047 lb475 kg

M 7.50's rig and sails

Upwind sail area
245 ft²22.8 m²
Downwind sail area
591 ft²54.9 m²
Mainsail area
160 ft²14.9 m²
Jib area
85 ft²7.9 m²
Symmetric spinnaker area
431 ft²40 m²
P
 iMainsail hoist measurement (from tack to head)
29’ 8”9.04 m
E
 iMainsail foot measurement (from tack to clew)
10’ 2”3.1 m
Rigging type
Sloop Marconi 3/4
Mast configuration
Deck stepped mast
Rotating spars
No
Number of levels of spreaders
1
Spreaders angle
20 °
Spars construction
Aluminum spars
Standing rigging
1x19 strand wire continuous

M 7.50's performances

Crew
< 240 kg
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.
285 ft²/T26.46 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.
686 ft²/T63.71 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.
70
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.
59 %
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.
6.35 knots

M 7.50's auxiliary engine

Engine(s)
1 outboard engine
Fuel type
Electric

M 7.50's accommodations and layout

Cockpit
Open aft cockpit
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