VÆRIDION taps Drive System Design for Microliner propeller drive

VÆRIDION has selected Drive System Design to develop, build and test the Blue-Label propeller drive system for its nine-seat Microliner electric aircraft. The UK work moves the propulsion system toward Copper Bird testing, first flight and certification.

Why it matters: - The propeller drive system is a critical part of VÆRIDION’s electric propulsion architecture, which must be mature enough for first flight and certification. - The new work advances the Microliner from concept into detailed design, hardware build and testing. - The partnership adds a third key supplier to VÆRIDION’s Electric Propulsion Unit, alongside MT-Propeller and Evolito.

What happened: - VÆRIDION selected Drive System Design to develop, test and supply the Blue-Label propeller drive system hardware for the nine-seat Microliner. - The agreement was announced at the Farnborough International Airshow. - Drive System Design will handle detailed design, development, manufacture and initial testing of the first Blue Label propeller drive system units in the UK.

The details: - The Microliner uses VÆRIDION’s proprietary multi-engine, single-propeller architecture. - Two independent electric engines drive one propeller through a direct-drive transmission system. - An integrated clutch decouples a failed engine so the remaining engine can keep driving the propeller. - Drive System Design was selected for its aerospace transmission and integrated electric propulsion experience. - VÆRIDION cited Drive System Design’s work on helicopter rotor gearboxes and propeller drives for electric aviation programmes. - The Microliner architecture was first demonstrated at 20% scale in 2024. - The programme advanced through preliminary design review in 2026. - The next milestone is full-scale Copper Bird testing and detailed design. - Drive System Design’s scope includes the propeller drive unit, motor support structure, driveshaft, clutch, oil-system development, component optimisation, hardware procurement, assembly and rig-based testing. - Before shipment, the units will undergo functional testing at Drive System Design’s UK facilities for rotational operation, lubrication performance, sealing and governor functionality. - The tested hardware will then be integrated with two electric engines on VÆRIDION’s test rig for full-scale propulsion system testing. - The hardware is intended to mature the architecture toward flightworthy and certification-compliant configurations. - The two-stage programme will first support VÆRIDION’s Preliminary Design Review gateway and then deliver tested hardware for integration into the full-scale Copper Bird ground-test platform at Oberpfaffenhofen airport in Germany.

Between the lines: - VÆRIDION is trying to reduce technical risk in a propulsion architecture that combines two engines into one propeller, while preserving redundancy if one engine fails. - Drive System Design’s role covers both engineering and physical testing, which suggests VÆRIDION wants the drive system validated before deeper flight-test commitments. - The emphasis on UK build and test work, followed by integration in Germany, shows a staged development path designed to de-risk certification.

What's next: - Drive System Design will complete detailed engineering, manufacture the first units and run initial bench testing in the UK. - VÆRIDION will use the hardware in Copper Bird testing at its ground-test platform in Oberpfaffenhofen. - The Microliner programme will continue toward first flight and certification.