Compact form, direct coupling and integrated Engine Management System mean faster install, cleaner wiring and lower integration risk.
Seamless ops across fuels and altitudes - no downtime for re-tuning.
More endurance or more payload from every litre.
Lower acoustic and thermal signatures, higher data quality, less fatigue on airframes, no pre-heating required for cold start.
Orbital’s FlexDI™ atomises fuel to ~8 µm droplets (vs ~120 µm conventional), delivering a cleaner, more complete burn. The result is >30% lower cruise fuel use, high specific power (>70 kW/L), and assured starts in –30 °C conditions with automatic altitude compensation to high density altitudes.
FlexDI™ runs JP-5/JP-8/Jet A/Jet A-1 or gasoline with no calibration change, meets MIL-STD-1474D noise targets, and uses electronic oil metering for consistent lubrication.
Intelligent electronic propulsion management system
Hardware designed and validated for aero applications
Black-box logging
Fault monitoring and “return to base” logic
Advanced control strategies for UAV applications:
Anti-stall
Power management
Speed control
Engine protection
The Boeing Insitu ScanEagle uses Orbital's 50HFE Integrated Propulsion System highlighting the performance and reliability required by Tier 1 Defence customers.
UAV-specific design, FlexDI™ efficiency and mission-grade support cut fuel, maintenance and downtime - reducing total cost from development to through-life support.
Designed for UAV duty cycles (not repurposed motorcycle engines): thrives in high-hot-heavy profiles; higher MTBO → fewer removals, fewer spares, less downtime.
Lower fuel burn (FlexDI™ / OCS): 30%+ cruise reduction unlocks longer missions on the same fuel or more payload - compounds across time.
Proven reliability, engineered improvement: 30+ years of data driving Continuous Product Improvement (CPI); essential for single-engine platforms and BVLOS/LoS extensions.
Mission Assurance, not ad-hoc S&R: spares, overhaul, diagnostics, and SLAs sized to your tempo - shifts lifecycle risk off your team and protects availability.
Fewer removals & teardowns: Long MTBO from UAV-specific architecture → lower maintenance labour and logistics.
Less fuel per flight hour: FlexDI™ efficiency → reduced opex or increased commercial yield (more data per tank).
Faster integration, fewer surprises: IPS + EMS + diagnostics → compressed development costs and quicker time-to-revenue.
Predictable sustainment: Support packages align cost to use; overhaul cycles planned, not reactive.
From 50–350cc FlexDI™ heavy-fuel engines and PMS, Orbital delivers proven reliability, efficient combustion, and straightforward integration - backed by decades of mission experience.
Orbital’s FlexDI™ heavy-fuel engines give you the payload headroom, endurance, and mission assurance electric struggles to match
When range, uptime and mission assurance matter, Orbital’s FlexDI™ heavy-fuel engines deliver higher energy on board, faster turnarounds, and proven reliability in harsh theatres.
Proven reliability and consistent power delivery across heat, cold, dust and wet - critical when crews lose direct visual control giving higher mission assurance for BVLOS corridors, maritime legs and remote operations.
ISR payloads are getting heavier and smarter. BVLOS routes are longer and harsher.
Higher energy density per kg than batteries means you can carry more sensors, comms and compute - or keep the same payload and fly longer.
Orbital’s FlexDI™ Integrated Propulsion Systems with superior fuel efficiency allows for bigger ISR packages, cleaner data, and less compromise on airframe weight balance. Fly further and smarter with Orbital.
All options deliver Orbital’s proven reliability, FlexDI™ efficiency, and mission assurance across all engines. Choose the engagement model that fits your programme, timeline, and budget.
For OEMs who need a system-level advantage with co-engineered propulsion that wins programmes.
We embed with your team to design and execute a bespoke Integrated Propulsion System (IPS), optimised for your airframe and mission profile - from requirements capture to flight test and beyond, we’re with you for the long run mission after mission.
Strategic Partnership Program >
Orbital’s renowned power, efficiency, and reliability - ready to deploy.
Standardised configurations of Orbital’s renowned Integrated Propulsion Systems with the same reliability and performance built on a 20 year pedigree - delivered faster and at a lower price point for OEMs seeking market leading Over Line of Sight (OLS) propulsion.
Mission Ready Engines >
Keep your fleet flying - every mission, every theatre.
Flexible service packages to maximise availability: spares & repairs, health monitoring, engine overhaul, and field support - tailored to your operating tempo.
Mission Assurance Support >
In the world of unmanned aerial vehicles, reliability begins long before the first flight.
Read more ...
Our FlexDI™ air-assisted direct injection system atomises fuel to ~8 µm droplets, compared to ~120 µm in conventional systems.
Read more ...
Tactical UAVs are flying higher, faster, and into increasingly contested environments - leaving no margin for inefficiency
Read more ...Let’s scope your programme.
Share timelines, quantities, and target budgets - we’ll map the best path (Partnership or Mission-Ready).
start with salesLet’s talk airframe and mission.
Bring your platform specs, payloads, and constraints - we’ll recommend the right engine/PMS configuration.
start with engineering4 Whipple Street, Balcatta,
Western Australia, 6021
+61 (08) 9441 2311
contact@orbitalcorp.com.au
210 Wasco Loop, Hood River,
OR 97031 USA
+61 (08) 9441 2311
contact@orbitalcorp.com.au
Copyright © 2025 Orbital Corporation Limited Australia. All rights reserved.
Privacy PolicyTerms of useLegalSite Map
