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Sailboat specifications and datasheets

RM 970 fin keel

The RM 970, here in "fin keel" version, is a 31’8” monohull sailboat designed by Marc Lombard. She was built by Fora Marine (France) and made of plywood with fiberglass / epoxy with galvanised steel frame. The production started in 2016 and has been awarded the title of "European Yacht of the Year - Category : Family Cruiser" in 2017.

The RM 970 belongs to the RM range. The RM 970 is as well listed, on Boat-Specs.com, in version Twin keel.

Find out more about the RM 970 on Boat-Spec's blog: European Yacht of the Year 2017

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RM 970's   Main Features
Model RM 970
Version Fin keel
Type of hull Monohull
Category Fast cruising sailboat
Shipyard
Designer Marc Lombard
Range RM
Award 2017 European Yacht of the Year - Category : Family Cruiser
Construction Hull:
Plywood with fiberglass / epoxy with galvanised steel frame
Deck:
sandwich PVC / fiberglass / polyester
First built hull 2016
Last built hull Still in production
Appendages Keel :
T-shaped keel (with bulb)
Helm 1 tiller (helm wheel in option)
Rudder 1 spade rudder (Double as option)
Cockpit Open aft cockpit
Unsinkable No
Trailerable No
EC certification B
Standard public price ex. VAT (indicative only) About
120 000
(2017)
RM 970's   Main dimensions
Length overall 34’ 8”
Hull length 31’ 8”
Waterline length 29’ 5”
Beam (width) 12’ 1”
Draft 6’ 11”
Mast height from DWL 52’ 8”
Light displacement 8598 lbs
Maximum displacement 11354 lbs
Capacity 2756 lbs
Ballast weight 2723 lbs
RM 970's   Rig and sails
Upwind sail area 658 sq.ft
Downwind sail area 1381 sq.ft
Mainsail area 358 sq.ft
Genoa area 299 sq.ft
Staysail area 169 sq.ft
Asymetric spinnaker area 1023 sq.ft
Rigging type Cat Boat Marconi 9/10
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum (carbon fiber as an option)
Standing rigging 1x19 strand wire discontinuous
Number of levels of spreaders 2
Spreaders angle Swept-back
RM 970's   Performances
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.
24.66
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.
51.78
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.
154
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.
32 %
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.
7.26 knots
RM 970's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine 20 HP
Fuel type Diesel
Fuel tank capacity 17.2 gal
RM 970's   Accommodation
Cabin(s) 2
Berth(s) (min/max) 4 / 6
Head(s) 1
Fresh water tank capacity 37 gal
Holding tank capacity 9.2 gal

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