Domain · Hydrodynamics & drivetrain
Marine propulsion is unforgiving: every kilogram, every decibel, every cubic centimetre shows up in range, signature, and yard time. 4XD treats the under-keel world as a full system — structure, shaft line, appendages, and power density — not a catalog of parts.
Compact marine drivetrain topology
A drivetrain architecture meant for harbor and coastal envelopes: high torque at low speed, tight packaging under the waterline, and service paths that yards can actually execute.
Limited disclosure
Structural interface for modular platforms
A modular structural node family so appendages, sensors, and propulsion packages share a repeatable load path instead of one-off steel poetry every time.
Abstract / visual
Appendage flow package for cleaner stern wake
Geometry and surface treatments aimed at organizing stern flow before it hits the propulsor. Measured first as hydrodynamics, then as system-level efficiency.
Limited disclosure
Low-signature shafting & bearing stack
From strut to stern tube: a stack that prioritizes alignment stability, serviceability, and acoustic hygiene under real hull flex.
Limited disclosure
Thermal-mechanical enclosure family
Enclosures and thermal paths for dense power electronics and actuators where salt air, shock, and access all have opinions.
Abstract / visual
Mechanical · Real-time simulator
Generate a planetary stage, watch teeth mesh under live kinematics, and tune the stack before anyone opens CAD. Standard architecture: fixed ring, sun input, carrier output.
Configurator · generator
Ring fixed · sun in · carrier out. Geometry rebuilds live; mesh kinematics integrate each frame.
Zr = Zs + 2·Zp for standard mesh
Ratio i
3.333 : 1
Output RPM
360.0
Tout
124.8 N·m
η est.
93.6%
P out
4.70 kW
ω carrier
37.70 rad/s
Torque / efficiency are illustrative engineering estimates for the demo — not lab-validated maps.
Technologies / Projects
Each project sits at a stage of development and disclosure. Visual language stays honest — more abstract early, more technical when open.
Full lattice →9 of 9 in view
Compact marine drivetrain topology
Quiet power density for constrained hull envelopes — fewer compromises between range and payload.
Structural interface for modular platforms
One honest mechanical language across prototypes that used to refuse to talk.
Appendage flow package for cleaner stern wake
Less wasted energy in the wake means more range for the same installed power — or quieter power for the same range.
Low-signature shafting & bearing stack
Bearing, alignment, and seal choices that treat vibration as a first-class design input, not a late surprise.
Thermal-mechanical enclosure family
Containment geometry that earns trust before it earns a datasheet.
Planetary stage generator & real-time simulator
Configure teeth, planets, and speed — watch the mesh run before anyone opens a CAD seat.
High-authority mechanical control linkage
Feels inevitable under load. Designed so the correct motion is also the easiest motion.
Engineering workspace that stays out of the way
Tools should disappear into craft. Interfaces that respect how engineers actually think.
IP packaging for deployable subsystems
Clear boundaries between secret sauce and shippable modules — partners know what they get.
Timeline
Honest accumulation of craft toward the reactor core — learning that compounds.
—
Serious builds. Quiet jokes. Obsessive detail on things nobody asked for — until they needed them.
SEA
Propulsion and under-keel integration become a primary domain: efficiency, signature, and manufacturability in the same sentence.
IP
Mechanisms, software, and manufacturing judgment stack into a single craft, not a pitch deck.
V1
Public face of the cave: a site and system that demonstrates the standard we hold ourselves to.
V2
The tools mature. The core stops being a metaphor. Amazingly powerful is the point.
Capabilities
Interfaces, tools, and systems that make complexity feel inevitable rather than heavy.
Mechanisms that behave correctly under load — and look like they always meant to.
From first article to partner-ready process. Craft without theater.
Protectable ideas, honest disclosure stages, and packages partners can actually use.
Engage
Investors, suppliers, and licensees each get a clear door — without fragmenting the story.
Roadmap, traction signals, IP strength, and the long arc toward the reactor core.
Prototyping needs, quality bar, and manufacturing partners who care about the fit.
Domain applications, evaluation paths, and concrete value for end users.