Place 25% displacement as batteries in lower half of legs
SAFETY
Multiple Airtight Compartments
Independent watertight sections per leg
ACCESS
Human Maintenance Entry
Ability to reach batteries and hardware
LEG DIMENSIONS
Length14.5 ft
Max chord8.5 ft
Max thickness2.55 ft
Waterline7.25 ft
Battery Placement & Height
LiFePO4 batteries should occupy the lowest practical volume in each leg.
The thinnest 3–4 feet of the trailing edge (where chord < 3.5 ft) is unsuitable for batteries.
Recommended battery zone0 – 5.5 ft from bottom
This places the majority of battery mass below the waterline while leaving adequate space
for access walkways and structural reinforcements.
Volume Allocation
Batteries (bottom)~38%
Access corridor~15%
Air compartments~35%
Equipment & wiring~12%
Compartment Strategy
1
Lower Battery Compartment
0–5.5 ft — Fully sealed, contains all batteries + charge controllers
2
Mid Access Compartment
5.5–9 ft — Waterproof floor with sealed hatch
3
Upper Dry Compartment
9–14.5 ft — Contains inverter, wiring, and stabilizer actuator
Safety Features
•Each compartment independently watertight with bulkheads
•Automatic bilge pumps + high-water sensors in lower compartment
•Trailing edge 3 ft section left empty as sacrificial crush zone
•Triple redundancy maintained across three legs
Human Access System
Entry Method
Top hatch + internal ladder
Entry through roof of upper compartment. Vertical ladder runs down one side of the foil.
Floor System
Two waterproof decks
Lower deck at 5.5 ft (battery top), upper deck at 9 ft. Both with 24×24" sealed hatches.
Access Width
Minimum 22" corridor
Maintained along one side of the foil where thickness remains > 18".
Design Assessment: Feasible
The proposed layout works well. Battery mass stays low, compartmentalization provides excellent damage control,
and human access is practical without compromising structural integrity or buoyancy.