Balanced-lift wing-assisted hybrid airships for ultra-heavy wind turbine logistics

Purpose The continued scaling of next-generation wind turbines toward rotor blades exceeding 120–140 m is creating major logistical constraints for conventional transport and installation systems. This study aims to investigate the feasibility of large wing-assisted balanced-lift hybrid airships as low-infrastructure platforms for the transport and airborne-crane installation of ultra-large wind turbine components. Design/methodology/approach A multidisciplinary conceptual design and parametric optimization framework integrating buoyancy modeling, aerodynamic performance estimation, structural mass scaling, propulsion sizing and mission-level energy analysis was developed. More than 120 configurations were evaluated across a representative design space spanning envelope volume, buoyancy fraction, wing geometry and propulsion assumptions. The cruise-oriented optimization was subsequently extended to a mission-constrained buoyancy–thrust–ballast (BTB) reference configuration incorporating zero-speed payload transfer, reversible water ballast, distributed vectored propulsion, bidirectional wing lift and optional helium thermal management. Aerodynamic and structural sensitivity analyses were additionally performed to quantify the robustness of the conceptual design assumptions. Findings The parametric analysis identifies a consistent cruise-oriented balanced-lift design region near comparable aerostatic and aerodynamic contributions, but the subsequent BTB analysis shows that this condition should not be interpreted as a fixed operational lift split. Instead, the revised vehicle follows a mission-dependent lift-sharing trajectory in which buoyancy, positive or negative aerodynamic wing lift, ballast and vectored thrust assume different roles throughout the transport–installation–return–pickup cycle. The representative WindZep-He 150 configuration retains a payload capability of approximately 150–155 t at a nominal cruise speed near 185 km/h. Segment-level mission analysis predicts approximately 9–11 t of fuel consumption for a representative 500 km round-trip transport-and-installation mission, while a 14 t onboard allocation is retained to provide operational reserve. Sensitivity analysis further indicates progressive rather than discontinuous degradation under cruise-drag penalties of 20%–30% and wing–empennage structural-mass increases of up to 75%. Research limitations/implications This study remains a conceptual-level investigation based on semi-empirical aerodynamic methods and first-order engineering models. Configuration-specific CFD, finite-element structural and aeroelastic analysis, nonlinear flight-dynamic simulation, suspended-load dynamics, mooring-load analysis and control-system development remain necessary before detailed design. The sensitivity results nevertheless indicate that plausible first-order aerodynamic and structural uncertainties modify performance margins without overturning the underlying architectural feasibility. Originality/value This study reframes balanced-lift not as a fixed aerostatic–aerodynamic lift ratio, but as a mission-adaptive architectural principle for ultra-heavy hybrid airships. The proposed BTB operating concept distributes the large vertical-force changes associated with payload transfer among reversible water ballast, bidirectional aerodynamic lift, thermal buoyancy preconditioning, limited compressed-air trim and distributed vectored thrust. This provides a physically consistent conceptual pathway for combining efficient forward transport with zero-speed airborne-crane capability while reducing dependence on conventional heavy-transport and erection infrastructure.