RM 890 Fin keel

Sailboat specifications

The RM 890 is a 29’2” (8.9m) fast cruising sailboat designed by Marc Lombard Yacht Design Group (France). She is built since 2013 by Fora Marine (France) and RM yachts (France). The Fin keel version displays a T-shaped keel, synonym of low center of gravity and reduced weight.

The RM 890 is as well listed, on Boat-Specs.com, in Twin keel version (see all the versions compared).

RM 890's main features

Model: RM 890
Version: Fin keel
Hull type: Monohull
Category: Fast cruising sailboat
Sailboat builder: Fora Marine
&
RM yachts
Sailboat designer: Marc Lombard Yacht Design Group
Sailboat range: RM
Country: France
Construction: Hull and deck: plywood with glass/epoxy stratification
First built hull: 2013
Last built hull: Still in production
Appendages: Keel : T-shaped keel (with bulb)
Helm: Single tiller
Rudder: Single spade rudder (twin as option)
Unsinkable: No
Trailerable: No
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: A
Standard public price ex. VAT (indicative only): About
96 500 €
(2020)

RM 890's main dimensions

Hull length: 29’ 2”8.9 m
Waterline length: 28’ 11”8.8 m
Beam (width): 11’ 2”3.42 m
Draft: 6’ 2”1.9 m
Mast height from D_WL: 45’ 11”14 m
Light displacement (M_LC): 7055 lb3200 kg
Maximum displacement (M_LDC): 9259 lb4200 kg
Capacity: 2205 lb1000 kg
Ballast weight: 2127 lb965 kg

RM 890's rig and sails

Upwind sail area: 538 ft²50 m²
Downwind sail area: 1238 ft²115 m²
Mainsail area: 269 ft²25 m²
Genoa area: 269 ft²25 m²
Staysail area: 151 ft²14 m²
Asymmetric spinnaker area: 969 ft²90 m²
I iFore triangle height (from mast foot to fore stay top attachment): 40’ 1”12.22 m
J iFore triangle base (from mast foot to bottom of forestay): 11’ 7”3.54 m
P iMainsail hoist measurement (from tack to head): 37’ 1”11.3 m
E iMainsail foot measurement (from tack to clew): 12’ 6”3.8 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 (carbon fiber spars as an option)
Standing rigging: 1x19 strand wire continuous

RM 890's performances

HN (French rating) iHN or "Handicap Nationale" is an empirical rating system used in France allowing various monohulls, of different sizes and designs, to race each other fairly. It is particularly suitable for cruiser and cruiser-racer. Therefore, by comparing these values, we can have an indication of the relative speed of 2 boats.: 22.0
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.: 248 ft²/T23.03 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.: 570 ft²/T52.96 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.: 133
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.: 30 %
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.: 7.20 knots