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Sailboat specifications and datasheets

Impression 45.1 standard

The Impression 45.1, here in "standard" version, is a 42’8” monohull sailboat designed by Rob Humphreys. She was built by Elan Yachts (Slovenia) and made of sandwich foam / fiberglass / vinylester (vacuum infusion). The production started in 2019 .

The Impression 45.1 belongs to the Impression range. The Impression 45.1 is as well listed, on Boat-Specs.com, in version Shoal draft.

Find out more about the Impression 45.1 on Boat-Spec's blog: European Yacht of the Year 2020 nominated sailboats

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Impression 45.1's   Main Features
Model Impression 45.1
Version Standard
Type of hull Monohull
Category Deck saloon cruising sailboat
Shipyard
Designer Rob Humphreys
Range Impression
Construction Hull and deck:
sandwich foam / fiberglass / vinylester (vacuum infusion)
First built hull 2019
Last built hull Still in production
Appendages Keel :
L-shaped keel (with bulb)
Helm 2 wheels
Rudder 1 spade rudder
Cockpit Closing aft cockpit with opening system
Unsinkable No
Trailerable No
EC certification A
Standard public price ex. VAT (indicative only) N/A
Impression 45.1's   Main dimensions
Length overall 45’ 5”
Hull length 42’ 8”
Waterline length 37’ 6”
Beam (width) 13’ 8”
Draft 6’ 2”
Mast height from DWL 64’
Light displacement 22972 lbs
Ballast weight 7297 lbs
Ballast type Cast iron
Impression 45.1's   Rig and sails
Upwind sail area 993 sq.ft
Downwind sail area 1886 sq.ft
Mainsail area 428 sq.ft
Genoa area 565 sq.ft
Gennaker area 1458 sq.ft
Rigging type Sloop Marconi (in-mast furling mainsail) 9/10
Rotating spars No
Mast position Deck stepped mast
Spars Mast and boom in Aluminum
Standing rigging 1x19 strand wire discontinuous
Number of levels of spreaders 2
Spreaders angle Swept-back
IiFore triangle height (from mast foot to fore stay attachment) 52’ 2”
JiFore triangle base (from mast foot to bottom of forestay) 15’ 8”
PiMainsail hoist measurement (from tack to head) 48’ 7”
EiMainsail foot measurement (from tack to clew) 17’ 7”
Impression 45.1'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.
19.33
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.
36.72
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.
197
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.
8.21 knots
Impression 45.1's   Auxiliary engine
Engine(s) 1
Engine type Inboard engine
Engine (min/max) 50 HP / 75 HP
Fuel type Diesel
Fuel tank capacity 56.8 gal
Impression 45.1's   Accommodation
Cabin(s) (min/max) 3 / 4
Berth(s) (min/max) 6 / 10
Head(s) 2
Fresh water tank capacity 136.3 gal

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