ORBITAL PMS
Advanced Power Management System

Clean Power
Total Control

It keeps your UAV’s critical systems powered.
Cleanly, continuously, and intelligently
‍Orbital’s PMS conditions and prioritises power, automatically switches between alternator / battery / shore, protects the avionics bus, and reports health via telemetry, so missions continue even when supply or load changes.
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Keep critical systems online

Two independent 28 V outputs for flight/mission-critical loads plus a regulated 14 V for ECU / ignition / fans; >90% efficiency, <10 W idle.

Seamless source switching

Alternator, 7S LiPo, or shore power with automatic handover under load and power sharing at low RPM. Keeps reserves topped up.

See and solve issues fast

CANbus real-time telemetry; with FlexECU® Argon, get improved fuelling algorithms under electrical load, fault/diagnostics monitoring, and black-box logging.

Built for the airframe

IP55-targeted sealed unit with IP68 fans for in-fuselage mounting; –10 to +50 °C ambient, 2200–7500 RPM alternator range, up to 30 A rectified input. Remote start from Orbital’s FlexDT™

Plan payload power with confidence:

PMS bridges the gaps so critical systems stay online.

Orbital’s PMS uses two independent 28 V outputs (flight/mission) letting you prioritise critical systems while keeping the payload powered.

Orbital’s Integrated Propulsion Systems

From 50–350cc FlexDI™ heavy-fuel engines and PMS, Orbital delivers proven reliability, efficient combustion, and straightforward integration - backed by decades of mission experience.

PMS Specifications:

Physical Specifications
Environmental Specifications
Electrical Specifications
Length
mm
220
Width
mm
120
Excludes connector caps.
Height
mm
115
90mm without fans.
Weight (with fans)
g
1710±50
Excludes connector cap and mounting hardware.
Weight (without fans
g
1410±50
Excludes connector cap and mounting hardware.
Ambient operating temperature
°C
-10 to +50
Thermal derating applies at higher ambient temperatures.
Storage temperature range
°C
-10 to +60
Max. internal temperature
°C
+110
Customer shall monitor reported PMS temperatures.
Ingress protection
-
IP55
Not verified. Assumes suitably sealed mating connectors.Supplied fans rated to IP68.
Typical efficiency
%
>90
Operating from Alternator, 500W @ 28V, 100W @ 14V, battery charging.
Idle power consumption
W
<10W
Operating from Shore Power, with no output loads.
Alternator Input
Rated engine speed range
RPM
2200-7500
Not verified. Assumes suitably sealed mating connectors.Supplied fans rated to IP68.
Min. rectified voltage
V (DC)
32
Below this, the backup battery / shore power inputs may be required dependent on 28V loading.
Max. rectified voltage
V (DC)
120
Max. rectified alternator current
A (DC)
30
Voltage sense accuracy
%
±5
Current sense accuracy
%
±3
Battery Input
Supported battery configuration
7S LiPo
Other battery configurations / chemistries must not be used.
Rated input voltage range
V (DC)
21-30
Outside this range, operation from battery will not be permitted.
Min. starting voltage
V (DC)
28
Below this, remote starting attempts will be prevented.
Max. input current
A (DC)
25
Current during a remote start attempt will be much higher.
Voltage sense accuracy
%
±3
Current sense accuracy
%
±3
Battery Input
Rated input voltage range
V (DC)
20-32
As measured at PMS.
Max. input current
A (DC)
25
Voltage sense accuracy
%
±3
Current sense accuracy
%
±3
Shore Power Input
Rated input voltage range
V (DC)
20-32
As measured at PMS.
Max. input current
A (DC)
25
Voltage sense accuracy
%
±3
Current sense accuracy
%
±3
14V Output (ECU and Ignition)
Regulation setpoint
V (DC)
14 ±0.2
Max. output current
A (DC)
12.5
Combined ECU & Ignition outputs, also includes fans fitted to PMS.
Voltage sense accuracy
%
±3
Current sense accuracy
%
±3
2x 28V Outputs (28V Flight Critical and 28V Mission Critical)
Regulation setpoint
V (DC)
28 ±0.5
Max. output current
A (DC)
16
Per independent bus.
Voltage sense accuracy
%
±3
Current sense accuracy
%
±3
Battery Charger Output
%
V (DC)
29 ±0.2
In Constant Voltage (CV) mode.
%
A (DC)
2.85
Nominal charging current in Constant Current (CC) mode.
%
%
±3
%
%
±3

Explore the 3 Ways to Work 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.

Strategic Partnership Programme

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 >

Mission-Ready Engines

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 >

Mission Assurance Support

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 >

50HFE
heavy fuel uav engine
75HFE
heavy fuel uav engine
150HFE
heavy fuel uav engine
350HFE
heavy fuel uav engine
PMS
advanced power
management system

News

The Role of Metrology in Orbital UAV’s Engine Crankcases

In the world of unmanned aerial vehicles, reliability begins long before the first flight.

Read more ...

At Orbital UAV, combustion efficiency begins with precise fuel atomisation

Our FlexDI™ air-assisted direct injection system atomises fuel to ~8 µm droplets, compared to ~120 µm in conventional systems.

Read more ...

Built for Extreme UAV Performance: OptiProp

Tactical UAVs are flying higher, faster, and into increasingly contested environments - leaving no margin for inefficiency

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Let’s chat about your airframe and mission requirements?

Sales

Let’s scope your programme.

‍Share timelines, quantities, and target budgets - we’ll map the best path (Partnership or Mission-Ready).

start with sales

Technical

Let’s talk airframe and mission.

Bring your platform specs, payloads, and constraints - we’ll recommend the right engine/PMS configuration.

start with engineering

Downloads

50HFE brochure75HFE brochure150HFE brochure350HFE brochurepms brochure

Australia

4 Whipple Street, Balcatta,
Western Australia, 6021
+61 (08) 9441 2311
contact@orbitalcorp.com.au

USA

210 Wasco Loop, Hood River,
OR 97031 USA
+61 (08) 9441 2311
contact@orbitalcorp.com.au