Two-Stroke or Four-Stroke? Choosing an EFI Engine for a UAV
Compare two-stroke and four-stroke UAV engines by installed mass, lubrication, maintenance and measured fuel use. Plan EFI for your existing 10–500 cc engine.
Technical guides
Technical articles on UAV engines, electronic fuel injection and hybrid generators. Explore integration requirements, fuel-consumption calculations and documented application examples.
UAV EFI Integration Checklist: What to Prepare
Prepare your engine, fuel, mechanical interface, electrical supply, autopilot and test requirements before an EFI integration enquiry.
A 77-Mile Hybrid Drone Flight: The Valmont Inspection Case
Explore the reported 2023 Valmont inspection flight using a Harris Aerial drone, and the historical HYBGEN 32 connection described by Löweheiser.
EFI for UAV Engines: Benefits, Calibration and Limitations
Understand how EFI manages fuel delivery in UAV engines, what calibration changes, and which requirements to check before replacing a carburetor.
34 cc Fuel-Injected Engine: A Zenoah-Based Development Project
Explore a historical 34 cc Zenoah-based EFI engine project, its intake and crankcase changes, and the test evidence to request for a new application.
Honda GX35 for UAV Projects: What to Check Before Integration
Assess the Honda GX35 as an engine-development candidate: lubrication, installation, EFI interfaces and the evidence needed for a UAV application.
Walbro Carburetors and EFI Throttle Bodies: Dimension Reference
Understand Walbro carburetor bore measurements and mounting patterns, with a historical reference table for discussing an EFI throttle-body conversion.
Heavy-Fuel UAV Engines: Injection Types and Compatibility
Understand direct and indirect injection in heavy-fuel UAV engines, and the fuel, starting and validation questions to ask before selecting a configuration.
Brake-Specific Fuel Consumption for UAV Engines: Units and Calculation
Calculate UAV engine BSFC in g/kWh, check a worked example, and understand the operating conditions needed for a useful fuel-consumption comparison.
Small Engine EFI Conversion: Engine and Carburetor Reference
Find historical engine and carburetor references for EFI conversion, then check mounting, fuel system and calibration requirements for your engine.
Löweheiser EFI and Quaternium: A Historical HYBRiX Collaboration
A historical account of Löweheiser EFI in Quaternium’s HYBRiX programme, with engine telemetry lessons and context for new UAV integrations.
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