A Diesel Engine Company
with a Tactical Power Obsession
Proprietary Diesel Engines
Co-Developed Axial Flux Motors
Purpose-Built Electronics
BlueSky Mobile Power is an American diesel engine & hybrid power technology company
Our Mission
Enable the Warfighter.
Support our Customers.
Own the Technology.
BlueSky Mobile Power is an American diesel engine and hybrid power technology company. We design, develop, and manufacture the propulsion and power generation systems that keep advanced tactical equipment running in the most demanding environments on earth.
Our core technology - the BMP-478 engine family and our co-developed axial flux motor - represents more than a decade of engineering investment across programs with IARPA, the Air Force, Marine Corps, and Army. Today, our systems are fielded on Stryker vehicles, proven at Army exercises, and deployed to operational environments.
We don't just deliver power. We deliver mission assurance with the confidence that comes from owning every layer of the technology stack.
Hybrid-Auxiliary Power Unit (H-APU)
The Heart of the System
The BMP-478 Engine Family
The BMP-478 is the world’s smallest automotive-production common rail diesel engine. Two cylinders. Electronic fuel injection. Multi-shot combustion capability. JP8 and F24 fuel ready. It’s not just small—it’s the foundation of an entire family of power systems built for defense and commercial applications.
BlueSky owns 100% of the IP: CAD assemblies, manufacturing drawings, PLM data, supplier quality records, assembly instructions, test data, automated test cells, and tooling. We are rehoming production to the United States with a domestic capacity of 30,000 engines per year.
Engine Heritage: An Old Soul with a New Heart
The Production-Proven Story behind the BMP-478
The BMP-478 is not a science project. It didn't come out of a lab, a SBIR white paper, or a startup's pitch deck. It is a production-proven, commerically deployed diesel engine with over 15 years of real-world service.
One platform. One supply chain. One training pipeline.
Three power classes that scale from squad-level C5ISR to vehicle-level hybrid drive.
- Electronic fuel injection with multi-shot combustion capability for lower noise and extended engine life
- Pressurized oil system for on-the-move capability at 15° inclination in any direction
- 5kW continuous without derating at 135°F ambient; up to 6.5kW in battle mode
- Variable speed operation eliminates wet-stacking and delivers up to 50% fuel savings at part loads
- Load-based maintenance intervals: 200-hour minimum, up to 500 hours. No valve adjustments, no drive belts
The BMP-478 Engine
A lightweight, fuel efficient, quiet, low vibration, and on-the-move ready engine, substantially outperforming its competition in its power output and displacement class.
Integration (Optional)
- Cold starting down to -40C with Arctic Kit.
- SAE 5 flywheel housing option
- Remote oil filter option
- Oil cooler option
- Turbocharger for 19kW output (in development)
- Integration as an APU, generator, mini tracked vehicle, UTV, or pump engine.
Mission Benefits
- Twin balance shafts substantially reduces vibrations.
- Water cooling paired with water to oil heat exchanger allows for no derating up to 55C / 130F ambient temperature, and creates a compact, lightweight design.
- Hydraulic lifters require no valve adjustment
- Military Fuel Ready. JP8 and F24 fuel ready.
- Aluminum block and head reduces the weight by 75 lbs compared to Kubota Z482.
- Common rail fuel injection. Electronic fuel injection allows for lower aural detectability, lower fuel consumption, and increases variable speed performance. Multi-shot fuel injection reduces aural signature and vibrations.
BSFC
ISG Fuel Efficiency
Engineered Together. Optimized as One.
Axial Flux Electric Motor Co-Developed with Trust Automation
Most power companies buy a motor and adapt it. We co-developed ours with Trust Automation, precisely tuning it to the BMP-478 engine’s operating characteristics. The result is a motor that doesn’t just bolt onto our engine—it was born alongside it.
The twin-stator, single-rotor permanent magnet design delivers 15kW+ continuous power and better than 93% system efficiency across its full operating map—measured through both the integratedstarter-generator and 3-phase drive conversion, not just the motor in isolation. That number is real, repeatable, and verified
- 15kW+ continuous rated power
- Better than 93% system efficiency across the operating map (ISG + 3-phase drive)
- 100% water cooled; operates at 105°C+ water temperature at rated load
- Active rectification with advanced 3-phase drive
- IP65 sealed: dust-tight and protected against powerful water jets
- Pressure-equalized for altitude operations and air transport
- Dual-role: serves as integrated starter/generator, eliminating the need for a dedicated starter motor
- Configurable output: 28 VDC for traditional combat vehicles, 600 VDC for hybrid and autonomous platforms
Consistently low fuel consumption
Effortless Integration.
Custom Power Electronics by Trust Automation
Our power electronics aren’t adapted from another application—they’re designed and manufactured by Trust Automation specifically for the BMP-478 engine and axial flux motor combination. Full Digital Signal Processor (DSP) control with standard CANbus interface ensures precise, efficient operation and seamless integration into vehicle and fleet management architectures.
This is what makes the variable speed magic work: because the electronics aren’t dependent on a fixedengine speed, the system maintains a flat efficiency curve across the entire load range. That means consistently low fuel consumption whether you’re running 10% load or 100%—and zero wet-stacking, ever.
Engine Heritage
An Old Soul with a New Heart
The BMP-478 is not a science project. It didn’t come out of a lab, a SBIR white paper, or a startup’s pitch deck. It is a production-proven, commercially deployed diesel engine with over 15 years of real-worldservice.
Production-Proven
Production-Proven
The Production Proven Story Behind the BMP-478
The engine was originally developed by a premier European engine manufacturer as a 478cc, 2-cylinder, liquid-cooled common rail diesel—purpose-built for the micro-vehicle and city car market. It powered brands across Europe in daily-use vehicles: stop-and-go urban traffic, cold starts in Scandinavia, summer heat in southern Italy, year after year. Tens of thousands were produced on an automated assembly line with full quality systems.
European Heritage
European Heritage
European Heritage
The European micro-car market demanded an engine that was impossibly light, whisper-quiet, andbulletproof reliable. That’s why the BMP-478 was built with:
- All-aluminum block — critical weight savings that no other engine in this class offers. The microcar market wouldn’t tolerate cast iron.
- Balance shafts — for smooth, low-vibration operation that no competitor in the military powerspace has. This is a feature you find in premium automotive engines, not tactical gensets.
- Common rail electronic fuel injection — from the factory, not bolted on as an afterthought. Multi-shot combustion capability for lower noise and extended engine life.
- Pressurized oil system — enabling reliable operation at angles, a by product of the automotive design requirements.
This engine earned its reputation not in a laboratory, but on the streets of Europe—in the unforgiving cycle of real-world commercial production: factory floors, quality gates, warranty claims, and millions of operating hours.
Coming to America: Lexington, NC
Coming to America: Lexington, NC
Coming to America: Lexington, NC
When BlueSky acquired the full IP and production line during development of the H-APU for the U.S. Army, we didn’t get a prototype or a concept. We got a seasoned, world-class engine with a proven production history, established supplier relationships, and a mature manufacturing process.
We brought it to Lexington, North Carolina—in the heart of NASCAR country, Davidson County, where stock car racing has been part of the culture since NASCAR’s inaugural 1948 season. The Piedmont Triad region is home to Richard Childress Racing and dozens of motorsport engineering firms.
The talent pool here doesn’t just know engines—they live and breathe them.
BlueSky’s new production facility at 301 Welcome Center Boulevard, Lexington, NC is a 67,000+ square foot manufacturing facility with a rich history of its own—it was built for and previously used by the motorsport industry to build race cars for NASCAR. The same facility that once prepared cars for the track will now build engines and hybrid power systems for the warfighter and industrial-commercial customers.
It was here, surrounded by race engineers who understand turbocharging, combustion dynamics, and extracting maximum performance from small displacement engines, that the BMP-478 got its turbo variant. NASCAR engineers didn’t just bolt on a turbocharger—they gave this engine a new life and a new mission. The BMP-478T (10kW) and BMP-478T+ (15kW) variants carry the DNA of 15 years of European production reliability, augmented by the performance engineering culture of American motorsport.
What We Changed vs. What Was Already World-Class
What We Changed vs. What Was Already World-Class
What We Changed vs. What Was Already World-Class
What the Engine Powers
The BMP-478 engine family powers a range of hybrid systems designed for the most demandingenvironments. Our primary product line is a family of Hybrid Auxiliary Power Units (H-APUs) engineered for C5ISR systems on ground vehicles—the systems that demand the smallest, lightest,most reliable power solutions in the military inventory.
Defense Applications
Hybrid Auxiliary Power Units (H-APUs) for mounted C5ISR: Stryker, MASCP, and tactical vehicle integration
- Dismounted tactical gensets for mobile command posts, TOCs, and expeditionary operations
- Silent watch power with auto start-stop and battery integration
- Integrated power and elevation solutions with BlueSky Mast systems
Commercial Applications
- Stationary and mobile generators
- Light towers
- Pleasure and commercial boat APUs
- UTV propulsion engines
Facilities
- R&D: Advance, NC
- Manufacturing: Largo, FL
- Strategic Development Partner: Trust Automation, San Luis Obispo, CA
Active Military Customers
- Army DEVCOM C5ISR
- Office of the Under Secretary of Defense (OUSD)
- 10th Mountain Division
- 25th Infantry Division (multiple exercises; currently deployed to southern border)
- Program Executive Office Ground Combat Systems (PEO GCS)