Union Pacific freight locomotive hauling a container train near Union Station, Los Angeles
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NexGen Rail Solution

The hybrid prime mover for every locomotive.

An LNG gas turbine and storage batteries replace the diesel engine. Same frame, trucks and traction motors.

LNG GAS TURBINE
3.3 MWe
  • Direct-coupled PM generator, no gearbox
  • Runs only at its best-efficiency point
STORAGE BATTERIES
1.1–4.4 MWh
  • Absorb every notch change
  • Capture regenerative braking energy
HYBRID PRIME MOVER
~40%
  • Lower fuel cost vs. diesel
  • Tier 4 NOx, no urea or exhaust filters
Photo: Downtowngal, CC BY-SA, via Wikimedia Commons
Canadian Pacific freight locomotives at Wilkie, Saskatchewan
OVERVIEW

Rail has the Edge,
but it’s losing Market Share.

Rail wins on efficiency but loses on share.

Where Rail stands
  • Trucks move more than twice the freight Rail does, even though Rail is about four times more fuel-efficient.
  • The average North American locomotive is 27 years old, the oldest the fleet has ever been.
  • Railroads are buying far fewer new locomotives than they used to. Most are rebuilding 1980s and 2000s diesels instead.
Why it has to change
  • To get share back from Trucking by lowering fuel costs.
  • Most of the fleet is below today’s EPA emissions standards, and nearly all short-line units are Tier 2 or older.
  • California (and other states will follow) will require half of locomotives to be Tier 4 by 2030, and all of them by 2035.
Sources: U.S. DOT Bureau of Transportation Statistics; Association of American Railroads; Railinc via Railway Age; EPA 2020 National Emissions Inventory; CARB.
Photo: Kabelleger / David Gubler, CC BY-SA, via Wikimedia Commons
TECHNOLOGY

LNG turbine · PMG · storage batteries.

Click a row or a marker to see what comes out, what goes in and what stays.

SD70MAC locomotive with the NexGen battery stack and turbine-generator installed
SYSTEMCOMES OUTGOES INSTAYS
Rows 1–4 match the numbered markers on the locomotive.
HOW IT WORKS

Turbine to traction.

Take the guided tour, or switch to Drive and run notch 0–8 yourself.

NexGen Rail Solution: LNG Turbine-Generator-Battery Power Kernel

NexGen Cryo
FUEL & PRIME MOVER POWER CONVERSION TRACTION DRIVE (RETAINED) LNG FUEL TANKS 4× Ø28" × 21'-6" · UNDERFRAME GAS TURBINE AERODERIVATIVE 3.3 MWe PM GENERATOR DIRECT-COUPLED · NO GEARBOX 3-Phase AC Bus EXHAUST GAS FUEL GAS AIR INTAKE (2) DUCTS RECTIFIER / CONVERTER 3-Phase AC ⟶ DC DC BUS CHARGE / DISCHARGE BATTERY STORAGE 1.1–4.4 MWh · 18× MLB MODULAR SOC 45% CAB CONTROL NOTCH 0-8 COMMAND 6× INVERTER & FILTER ONE PER TRACTION MOTOR DC ⟶ NOTCH 0-8 AC MMMMMM TRUCK A TRUCK B REGENERATIVE BRAKING ENERGY 6× AC TRACTION MOTORS Exhaust gas Combustion air LNG fuel gas 3-Phase AC Bus DC bus Battery charge / discharge Traction AC Regen braking Control signal
Tap any component in the diagram for details.

    Battery operating window
    State of charge. The turbine never throttles.
    30–90% OPERATING WINDOW
    0%30%90%100%
    The Power kernel
    • 3.3 MWe gas turbine, direct-coupled to a permanent-magnet generator. No gearbox.
    • AC out of the generator, rectified onto a DC traction bus.
    • The whole kernel fits in about 11 × 5.3 × 4 ft.
    The battery’s job
    • Takes every notch change, so the turbine never idles or throttles.
    • Works between 30% and 90% charge to protect battery life.
    • Soaks up braking energy and gives it back on the next climb or start.
    VALUE PROPOSITION

    Cut the fuel bill.
    Keep the locomotive.

    THE MAIN VALUE
    ~40%
    Lower fuel cost vs. diesel
    On the same frame, trucks and traction motors.
    WHERE THE SAVINGS COME FROM
    Cheaper fuelLNG costs 30–50% less than diesel per unit of energy.
    No wasted burnThe battery handles notch changes, so the turbine never idles or runs at part load.
    Free energy backRegenerative braking recharges the battery instead of heating grids.
    Payback
    • About 3 years on Class I mainline duty, where locomotives burn the most fuel.
    • About 8 years for short lines, which run fewer miles.
    • No new right-of-way, overhead wire or new locomotive purchase.
    Cleaner, too
    • About 29% less CO₂ for the same energy, because natural gas carries less carbon than diesel.
    • Tier 4 NOx without urea or exhaust filters to buy, fill or maintain.
    • Ready for California’s 2030 and 2035 locomotive rules.
    Approximate, at 100,000 miles a year per locomotive; excludes maintenance, financing, residual value and LNG fueling infrastructure. CO₂ per U.S. EPA Emission Factors for GHG Inventories. NOx limits per EPA locomotive standards (40 CFR 1033); NexGen NOx is an estimate on a line-haul duty cycle.
    PATH TO COMMERCIALIZATION

    Pilot to production.

    Rail launch Dec-27

    Gold stages are underway. Dates are planning targets.
    MESSAGE TO RAIL COMPANIES

    To the railroads that move North America.

    Dennis W. ChalmersFounder & CEO, NexGen Cryogenic Solutions
    Dennis W. Chalmers at the Transportation Technology Center, Pueblo, Colorado
    Dennis W. Chalmers at the Transportation Technology Center, Pueblo, Colorado

    You already run the most efficient way to move freight over land. A train carries a ton of freight about four times farther on a gallon of fuel than a truck. That advantage is real, and it belongs to you.

    The locomotives delivering it, though, are the oldest they have ever been. And the options in front of you have barely changed in forty years: keep overhauling aging diesel engines, or buy new diesel locomotives.

    We are building a third option: a hybrid prime mover. NexGen replaces the diesel engine and keeps everything else: the frame, the trucks, the traction motors and the crews who know them.

    The hybrid pairs two technologies. An LNG gas turbine with a direct-coupled permanent-magnet generator makes the Power, and it runs only at its most efficient point. Battery storage handles everything else: it absorbs every notch change, so the turbine never idles or throttles, and it supplies Power when the train needs a surge.

    And when the train slows, the energy is not wasted. Regenerative braking sends it back into the batteries instead of burning it off as heat in the dynamic-brake grids, ready for the next climb or start.

    Together, cheaper fuel, best-efficiency running and recovered braking energy deliver roughly 40% lower fuel cost and Tier-4-class NOx without urea or exhaust filters, on locomotives already on your roster. Every point of fuel cost you take out widens Rail’s lead over trucking, and that lead is how Rail wins freight back.

    Our first unit goes to instrumented track testing at TTC Pueblo in October 2027. We are now choosing launch partners to prove it on real routes, real loads and real fueling plans. Tell us about your railroad, and we will show you what the numbers look like on it.

    Let’s talk about your fleet.

    Contact Us