Here is the HTML output for your calculations: ```html Seafloor Design Model Calculations > >

Seafloor Design Model Calculations

1) Volume of Foam Required

Mold Dimensions:

Inside Span = 3.75 inches
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Mold Length = 42 inches (3.5 feet)

Mold Width = 20 inches (16 inches + 4 inches for members)

Mold Volume:

Volume = Span × Length × Width = 3.75 inches × 42 inches × 20 inches = 3150 cubic inches

Foam Conversion:

1 cubic inch = 0.0163871 gallons
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3150 cubic inches = 3150 × 0.0163871 gallons = 51.64 gallons

1 gallon = 16 cups
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51.64 gallons = 51.64 × 16 cups = 826.24 cups

Mix Ratio:

For 2-part foam, mix equal parts by volume. Therefore, mix 413.12 cups> of each part to fill the mold.

2) Model Weight in Seawater

Assumptions:

3 wing/legs, each 50% submerged
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Seawater density = 64 lb/ft³
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Volume of each wing/leg:

Mold Volume = 3150 cubic inches = 3150 × (1/12)³ cubic feet = 1.83 cubic feet

Submerged volume per wing/leg = 50% of total volume = 1.83 × 0.5 = 0.915 cubic feet

Displaced weight per wing/leg = Volume × Density = 0.915 × 64 = 58.56 lbs

Total displaced weight for 3 wings/legs = 58.56 × 3 = 175.68 lbs

Total Model Weight:

To float, the model weight must equal the displaced water weight. Therefore, the total weight of the model should be 175.68 lbs..

Froude Scaling Rules

1) Full-Scale Dimensions (1:6 Scale)

Scale Factor: 1:6

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Inside Span (Full Scale):

3.75 inches × 6 = 22.5 inches

Mold Length (Full Scale):

42 inches × 6 = 252 inches (21 feet)

Mold Width (Full Scale):

20 inches × 6 = 120 inches (10 feet)

2) Full-Scale Displaced Water Weight

Assumptions:

3 wings/legs, each halfway submerged
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Seawater density = 64 lb/ft³
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Volume of each wing/leg (Full Scale):

Mold Volume = 1.83 cubic feet (from earlier calculations)

Submerged volume per wing/leg = 50% of total volume = 1.83 × 0.5 = 0.915 cubic feet

Displaced weight per wing/leg = Volume × Density = 0.915 × 64 = 58.56 lbs

Total displaced weight for 3 wings/legs = 58.56 × 3 = 175.68 lbs

Total Displaced Water Weight (Full Scale):

3 × 0.915 × 64 = 175.68 lbs

3) Force to Move Wings/Floats

Assumptions:

Drag force formula: F = 0.5 × ρ × v² × Cd × A
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Seawater density (ρ) = 1025 kg/m³
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Dynamic drag coefficient (Cd) for low Cd design = 0.04
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Area (A) = Span × Length
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的理解

> > ``` (Note: The calculations for force and power are complex and depend on additional assumptions, such as the shape of the wings, speed in meters per second, and specific motor efficiency. These calculations require further refinement to provide accurate results. Let me know if you'd like me to expand on this!)