Engineering

Arcimoto Mean Lean Machine

Tilting 3-wheel Ebike: mechanical design and suspension analysis software

Led all mechanical work on Arcimoto's tilting three-wheel electric vehicle and built a generalized suspension-geometry simulation framework - evolving it from a Python script into a full Unity application with an evolutionary optimizer. Before/after vehicle data confirms the design changes.

Role
Primary Mechanical Engineer
Applied
UnityPythonSimulationEvolutionary AlgorithmsSuspension DesignDFMManufacturing
Designer Nikolas Johnson and main fabricator with the V3 Mean Lean Machine - the first version shown to the public
FIG 01Me (left) and main fabricator/designer with the V3 build - the first version of the Mean Lean Machine shown to the public, fabricated at Mercury Metal in Eugene, OR.

My contribution

Objective

The Mean Lean Machine is a tilting three-wheel EV whose handling depends heavily on its suspension geometry. Rather than tune that geometry by hand, the goal was a reusable optimization engine - something that could search the geometry space automatically and adapt to any vehicle, not just this one. I was responsible for the mechanical design, the manufacturing files, and the validation data.

Arcimoto Mean Lean Machine frame fabrication - raw tubular suspension and steering geometry on welding table with blueprints
FIG 02Frame fabrication in progress.

Technical details

The framework began as a Python model of the suspension geometry and grew into a full Unity application with an integrated UI and an evolutionary optimization algorithm. Because the geometry is parameterized generally, the same optimizer can be pointed at any vehicle. The simulation drove concrete design changes, which were then carried into manufacturing files and built - and the before/after vehicle data confirms the predicted improvements.

Arcimoto Mean Lean Machine in action - tilting three-wheel EV leaning through a turn on pavement, demonstrating the suspension geometry produced by the optimization framework
FIG 03The vehicle tilting in operation.
Deep dive
Simulation & Validation Data
Before/after accelerometer plots and Unity simulation screenshots
View data & simulation