HiRail rail-maintenance vehicle, mechanical engineering by ONMOTIO

    [ MECHANICAL ENGINEERING ]

    Engineered to survive contact with reality.

    We turn design intent into production-ready assemblies that hold under load, pass under inspection, and manufacture under cost pressure. From FEA through DFM, GD&T through pilot run, we engineer hardware that ships the first time and stays shipped.

    200+ assemblies delivered across aerospace, transit, consumer, and industrial. Regulated work for FDA, CE, UL, and CN-class compliance. Engineering behind eXalt Aircraft, HiRail Leasing, and SolarSmart Mower.

    [ IS THIS FOR YOU ]

    Mechanical engineering with us is the right next step if…

    [ A GOOD FIT ]

    • You have a working concept that needs to become a manufacturable, certifiable product.
    • You need structural validation (FEA, fatigue, thermal) before committing to tooling.
    • You're standardizing engineering across multiple product variants or chassis platforms.
    • You need to meet regulatory requirements (FDA, CE, UL, CN, FAA, DOT).
    • Your existing design works in CAD but fails on the factory floor.

    [ PROBABLY NOT ]

    HiRail standardized chassis configurations

    [ IN PRACTICE ]

    HiRail: Standardizing the unstandardizable.

    HiRail converts standard truck chassis, from Ford F350s up to Freightliner 10-wheelers, into rail-maintenance vehicles compliant with Canadian National's documentation standards. They needed one engineering system that worked across every chassis variant. We built the structured PDM, standardized the configuration drawings, integrated the hydraulic and electrical systems for onboard cranes, stabilizers, and rail signalling, and ran weight-and-balance analysis across the full platform range.

    5+

    Chassis platforms unified

    100%

    CN documentation compliant

    Validated

    Weight & balance, full range

    Self-run

    Internal team trained on PDM

    [ POINT OF VIEW ]

    How we approach mechanical engineering.

    Four principles that shape every engineering project we run. Engineering rewards focus over breadth, so we are short and clear about what we believe in before we touch a CAD model.

    FEA stress simulation
    01

    Simulate before you tool.
    Always.

    Static, dynamic, fatigue, thermal. Running simulation before tooling costs hours. Fixing a structural failure after tooling costs weeks and tens of thousands. We run FEA on every load-bearing assembly, and we validate simulation against physical testing whenever the application is critical.

    02

    Tolerance stack-ups beat wishful thinking.

    Most assembly problems on a factory floor trace back to nominal-dimension thinking that ignored worst-case stack. We model statistical tolerance from day one, predict assembly yield before the first part is made, and design GD&T schemes that the factory can actually inspect.

    −3σ+3σ
    03

    Documentation is the deliverable, not the byproduct.

    GD&T per ASME Y14.5, full BOMs, mold flow reports, FEA validation packages, manufacturing drawings that leave nothing to interpretation. The handover document is the product. If the next team can't run with it, the engineering didn't ship.

    04

    Manufacturable beats elegant.

    A clever mechanism that requires three custom fasteners and a special jig isn't engineering, it's a vanity project. We optimize part count, simplify assembly sequence, and use standard hardware wherever possible. The most beautiful assembly is the one that goes together in 30 seconds without instructions.

    [ THE PROCESS ]

    The validation gates.

    Typical engagement: 10–18 weeks

    Five gates. Each one closes a category of risk before the next phase begins. We do not move forward on optimism, we move forward on evidence.

    1. 01Requirements
    2. 02Architecture
    3. 03Simulation
    4. 04DFMEA
    5. 05Release
    01Week 1–2

    Requirements Capture

    Functional, environmental, regulatory, and cost-target requirements captured in a formal Engineering Requirements Specification (ERS). Load cases defined. Service-life expectations agreed.

    Risk closed:Spec drift. Everyone now agrees on what the product must do, in writing, before any geometry is drawn.
    OutputSigned ERS that becomes the project's spec contract.
    02Week 2–4

    Architecture & Concept

    Decisions on fastening, sealing, thermal management, assembly sequence, serviceability, and platform strategy. Multiple approaches evaluated using Pugh matrices.

    Risk closed:Wrong architecture. The structural and assembly strategy is locked, so detailed design can't paint us into a corner.
    OutputLocked architecture with rationale documented.
    03Week 4–10

    Detailed Design & Simulation

    Full parametric CAD with GD&T. Mold flow simulation for injection-molded parts. FEA validation on every load-bearing assembly.

    Risk closed:Structural failure. Every load-bearing assembly is proven against load cases in simulation before any tooling spend.
    OutputSimulation-validated CAD ready for design review.
    04Week 10–12

    Design Review & DFMEA

    Formal design review and Design Failure Mode & Effects Analysis. Failure modes identified, ranked, and mitigated through design controls.

    Risk closed:Unmitigated failure modes. Every credible failure path is identified, ranked, and mitigated before release.
    OutputDFMEA document and engineering change orders implemented.
    05Week 12–18

    Validation & Release

    DVT/PVT testing support. First article inspection. Production data package release. We stay involved through the first production run.

    Risk closed:Production drift. The first articles match the released package, and the line is set up to keep matching it.
    OutputReleased production package, validated against the ERS from Gate 01.
    The ONMOTIO product development team at work

    Eduardo Leardini & Izek Therrien

    Head of Product Development · CEO & Co-Founder

    [ THE TEAM ON THIS ]

    The engineers who'll lead your project.

    Eduardo leads our mechanical engineering practice, partnered with Izek on every engagement. Their backgrounds span aerospace, automotive, rail, and consumer electronics. Disciplines where you can't fake the work, the regulator is the customer, and the tolerance has to hold.

    On a typical mechanical engineering engagement, Eduardo runs the project directly with two-to-four engineers depending on scope, and Izek stays in the design reviews from Gate 01 through to first article inspection. No farmed-out work, no surprise account managers.

    Eduardo Leardini, Head of Product Development · Izek Therrien, CEO & Co-Founder

    [ WHY ONMOTIO ]

    Why teams hire us for mechanical engineering.

    Engineering and design on the same model.

    Most engineering vendors receive a CAD file at the door and start fresh. Our engineers worked on the same parametric model alongside our designers from week one. No "the design didn't account for this" surprises. No re-skinning to accommodate engineering compromises after the fact.

    Regulated industries are home turf.

    We've shipped work in aerospace (eXalt), transit infrastructure (HiRail), and industrial equipment. Our documentation meets FDA, CE, UL, and CN-class standards out of the box because we've done it before, not because we're learning on your project.

    Simulation is grounded in physical testing.

    FEA without correlation is theatre. We validate simulation against real-world testing on every critical application, and we adjust our simulation models when reality says otherwise. The result: you can trust the numbers we ship.

    We finish the job at the factory.

    Many engineering firms walk away at the data package handover. We stay involved through DVT/PVT, first article inspection, and the first production run. The engagement ends when the product ships at quality, not when the drawings are released.

    [ FAQ ]

    Common questions.

    You do, full stop. Once we deliver the released production package and you've paid the final invoice, all engineering IP transfers to you. We retain the right to feature the work in our portfolio with your approval.

    Mechanical engineering engagements at ONMOTIO start in the low five-figures for focused single-assembly projects and run into six figures for multi-platform programs, regulated products, or full structural-validation packages. We give you a fixed-scope quote after the discovery call.

    Yes. We've worked under FDA, CE, UL, CN-class, and FAA frameworks. We don't run the certification testing ourselves, we manage the relationship with accredited test labs and produce the documentation packages they require.

    Linear static, non-linear, dynamic, thermal, and fatigue analysis depending on the application. For critical applications we validate simulation results against physical testing.

    Both. We frequently optimize existing products by reducing part count, improving assembly, or resolving field failures. We can work from existing CAD or reverse-engineer from physical samples.

    Yes, mutual NDA before any project specifics. We can send ours, sign yours, or work from a mutual document.

    Yes. After the initial call, we'll connect you with 2–3 client references whose product category is closest to yours.

    [ NEXT MOVE ]

    Have a product to engineer?

    The first conversation is free and runs about 30 minutes. We'll cover what you're building, what's stuck, what the constraint really is (cost, regulation, timeline, all three), and whether mechanical engineering is the right next move. No deck, no sales pitch.