Propulsion Integration
Making the engine, installation and airframe work as one system — heat rejection, airflow, slipstream and operating limits treated together.
The Problem
An engine that performs perfectly on the dynamometer can disappoint badly in the airframe. Installation decides real-world performance: how the engine breathes, how it rejects heat, how the propeller inflow and exhaust interact with the airframe, and how the operating profile loads every subsystem at once.
On Rotax-powered UAVs and light aircraft, the integration problems concentrate in a few places — cooling interfaces, engine-bay airflow, slipstream interaction and the mismatch between published engine data and installed reality.
Rotax installation on the REAH flying-laboratory platform, used to develop thermal, propulsion and instrumentation workflows.
Typical Customer Questions
- Why does the installed engine run hotter, or produce less usable performance, than the datasheet suggests?
- How do we adapt a certified-installation manual to an unmanned or special-purpose configuration?
- What does the propeller slipstream do to our cooling flow and stability margins?
- Which operating limits actually constrain our mission profile — and which have margin?
How We Work
- Engineer. Build an installation-level model of the powerplant: heat rejection, induction, exhaust, cooling interfaces and electrical loads across the mission profile.
- Simulate. Resolve engine-bay airflow and slipstream interaction with CFD; check the installation against manufacturer limits phase by phase.
- Build. Design and prototype the installation hardware — mounts, baffles, ducting, cooling interfaces.
- Test. Instrument the installation and demonstrate limit compliance under representative operating conditions.
- Learn. Correlate installed performance with the model and resolve the differences between predicted and measured behaviour.
- Transfer. Preserve the configuration, integration logic, validation method and operating evidence for continued customer use.
Typical Deliverables
- Installation review against engine-manufacturer requirements
- Engine-bay airflow and thermal analysis
- Slipstream-interaction studies for tractor and pusher configurations
- Installation hardware design and prototype support
- Operating-limit and mission-envelope analysis
Evidence
Our propulsion-integration methods are being developed and demonstrated on our own flying laboratory and published through Projects and the Knowledge Engine.
Propeller, rotor, wheel and heat-source regions assigned together in REAH CFD Studio — the installation modelled as one system, not analysed component by component.
Boundaries and Limitations
- Engine internals remain the manufacturer's domain; we engineer the installation around them.
- Manufacturer installation manuals and limits always take precedence over our analysis.
Discuss a propulsion integration problem
Bring the aircraft, operating condition and programme constraint. REAH will map the system, the evidence required and the fastest credible path forward.