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Sailboat specifications and datasheets

M 7.50

The M 7.50 is a 24’7” coastal monohull sailboat designed by Gilles Bréteché. She was built by BG Race (France) and made of sandwich fiberglass / polyester. The production started in 2015 .

The M 7.50 has also been marketed as Monotype 7.50.

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M 7.50's   Main Features
Model M 7.50
Type of hull Monohull
Category Sport keel boat
Shipyard
Designer Gilles Bréteché
Construction Hull and deck:
sandwich fiberglass / polyester
First built hull 2015
Last built hull Still in production
Appendages Keel :
Fin without bulb
Helm 1 tiller
Rudder 1 spade rudder
Cockpit Open aft cockpit
Unsinkable No
Trailerable Yes
EC certification C
Standard public price ex. VAT (indicative only) About
30 200
(2017)
M 7.50's   Main dimensions
Hull length 24’ 7”
Waterline length 22’ 6”
Beam (width) 6’ 1”
Waterline beam (width) 5’ 2”
Draft 4’
Mast height from DWL 34’ 8”
Fore freeboard 2’ 2”
Light displacement 1764 lbs
Ballast weight 1047 lbs
M 7.50's   Rig and sails
Upwind sail area 245 sq.ft
Downwind sail area 591 sq.ft
Mainsail area 160 sq.ft
Jib area 85 sq.ft
Symetric spinnaker area 431 sq.ft
Rigging type Sloop Marconi 3/4
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire continuous
Number of levels of spreaders 1
Spreaders angle 20 °
PiMainsail hoist measurement (from tack to head) 29’ 8”
EiMainsail foot measurement (from tack to clew) 10’ 2”
M 7.50's   Performances
Crew < 240 kg
Upwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
26.46
Downwind sail area to displacementiThe 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 23 it indicates a fast sailboat.
63.71
Displacement-Length ratio (DLR)iThe Displacement Length ratio is a figure that points out the boat's weight compared to its waterline length. 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 ratioiThe Ballast ratio is an indicator of the stability; it is obtained by dividing the boat's displacement by the weight of the ballast. Since the stability depends also of the hull shape and the position of the center of gravity, only boats with similar ballast arrangements and hull shape should be considered.
Higher the ballast ratio is, greater is the stability.
59 %
Hull speediAs 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
Engine type Outboard engine
Fuel type Electric

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