```html Seastead Optimizer

Seastead Leg Optimizer

Interactive tradeoff analysis for NACA leg profiles • Fixed displacement volume

Assumptions:
• Fixed displacement volume (baseline NACA 0030)
• 50% leg submerged
• Cd varies with thickness
• Aluminum skin 0.25" + 40% structure
• $18/lb fabricated marine aluminum
Leg Profile Dimensions
(Total L / Draft / Chord / Thick)		 Waterplane Area
(Total ft²)		 Restoring Force
(lbs per ft heave)		 Est. Speed
(knots @ 10kW)		 Heave w/o Stab
(ft in 5ft wave)		 Stab Force
(Total lbs)		 Stab Influence
(ft equiv.)		 Heave WITH Stab
(Final Motion)		 Leg Weight
(lbs Marine Al)		 Cost (1 leg + 1 stab)
($ @ $18/lb)
Model Notes: Displacement volume held constant across all profiles. Heave calculated from simplified impulse model: a = (wave_amp × g) / draft, then s = ½at² over T/4. Stabilizer force uses water density at calculated speed. Smaller waterplane area (thinner foil → longer leg) reduces heave excitation due to increased draft. Speed uses v³ relationship from power vs. foil strut drag.
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