Tank & access / Design study / RECTANGULAR-FAMILY-R9
Two sizes. One design language.
Four planned models, with separate 1,500- and 2,000-gallon body envelopes.
Retained development study. Dimensions, names and checks belong to this revision—not automatically to the retrofit-only product. Manufactured tank shells are deferred. No installation instruction, certification or manufacturing release is represented.

The source reasoning
Why this detail was investigated.
The larger model gets a longer body while access hardware retains its size. Provisional headspace and displacement assumptions inform the geometry; actual working capacities still need verification.
Read the research and limits


Research record
The detail behind
the study.
Source-linked work for this revision. Reported checks describe the stated model or test; physical qualification and applicability to the current retrofit remain separate.
The 1,500-gallon pair uses a 3.370 m body; the 2,000-gallon pair uses a 4.410 m body. Both are 1.801 m wide, with fixed-size access hardware and the simpler continuous casing. All four views below are rendered from the revised CAD meshes.
SUB1500
Ice blue model badge · CAD-driven exterior model
SUB2000
Amber model badge · CAD-driven exterior model
SUBENG1500
Teal model badge · CAD-driven exterior model
SUBENG2000
Violet model badge · CAD-driven exterior model
Exterior concept models. Recesses are unvalidated styling candidates; no strength or weight benefit is claimed. Sizing uses a provisional 250 mm headspace and 10% displacement reserve. Actual working capacities remain unverified until internal equipment and hydraulic levels are established. Detailed internal integration, joints and structural validation remain in progress.
Source and revision record
Source: rectangular-family-r9/index.html
Source SHA-256: f512213a1a763d43f5ed3dc99c0a4366d875b0a1ea07aaf6c7f951d0465012b7
Geometry and images describe this development revision. Current product ratings and manufacturing release require separate qualification.
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