Artemis 39 Sport Yacht INTERIOR ARRANGEMENTS Architecture & Design Andrei Rochian

Artemis 39 Sport Motor Yacht INTERIOR ARRANGEMENTS & Cummins Diesel with Konrad Sterndrive
Architecture& Design Andrei Rochian built by Selene Ocean Yachts

One Master BEDROOM with double Bed
One Guest Bedroom with two single beds
ONE BATHROOM with Shower
Galley Kitchen with stove and double sink
Fridge
COCKPIT LOUNGE Convertible Seat converts to Sunbath at rear
Cockpit Bar Sink and Folding table
Engineroom Access hatch
Storage
Dinghy garage
Specifications
Length Overall (LOA): 12 m (including swim platform)
Molded Hull Length (L): 10.6 m
Length at Waterline (LWL): 9 m
Beam Overall (B): 3.7 m
Beam at Waterline (BWL): 3.2 m
Bare Boat Displacement: 10,500 kg
Design Speed: 40 knots (saltwater)
Deadrise at Mid-Length: 17.31°
Deadrise at Stern: 22°
LCG/Bch Ratio: 0.85 (acceptable range: 0.6–3)
Propulsion System: 2 x 350 HP inboard engines with sterndrives
Thrust Line Shaft Angle: 10°
Hydrodynamic Coefficients and Fractions
Displacement-Length Ratio (DLR): 153.2
Beam-Length Ratio (B/L): 0.411
Prismatic Coefficient (Cp): 0.60
Froude Number (Fr): 2.18
Wetted Surface Area (S): 33.2 m²
Total Resistance (RT): 7220 N
Power Requirements (P): 332 HP
Analysis of the boat's performance, including aspects of drag, stability, and power requirements:
1. *Design Overview*
*Design Speed:* 40 knots (saltwater)
*Max Planing Length (L):* 6,445.84 mm
*Max Planing Beam (B):* 3,168.98 mm
*Displacement (bare):* 10,500 kg
*LCG/Bch:* 0.85 (within acceptable range 0.6 - 3)
*Deadrise at Mid-Length:* 17.31° (within typical planing hull ranges of 0 - 30°)
*Thrust Line Shaft Angle:* 10°
2. *Drag Analysis*
Drag prediction is critical to understanding the power required at various speeds.
*Drag at Design Speed (40 knots):*
*Bare Hull Drag (Rbare):* 13,528.72 N
*Total Drag (Rtotal):* 14,881.59 N
*Effective Power (PEtotal):* 410.66 HP
*Brake Power (PBtotal):* 821.32 HP
At 40 knots, the total drag force is approximately 14,881.59 N. This value increases as speed increases due to hydrodynamic resistance.
3. *Power Analysis*
*Required Power at 40 knots:* The effective power (PEtotal) at 40 knots is 410.66 HP. Considering a design margin and transmission losses, the brake power (PBtotal) increases to 821.32 HP. This indicates the required engine power to maintain 40 knots.
4. *Stability and Trim*
The trim angle increases with speed, peaking at 5.57° at 50 knots.
*Planing Behavior:* At 40 knots, the boat is in an effective planing regime. The planing beam is nearly constant at all speeds, ranging from 3,168.64 mm at 10 knots to 3,167.72 mm at 50 knots. The deadrise also remains stable at approximately 17.13°, which is conducive to planing.
. *Overall Performance*
*Design Speed (40 knots):* The performance at the design speed appears feasible with a total required brake power of 821.32 HP.
*Drag:* At 40 knots, the drag is within a reasonable range
*Planing Characteristics:* The vessel’s deadrise and planing beam support stable planing at high speeds

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