1.Date: 08/01/2026 2.Title of datasets: Accompanying data of the paper "Technology exploration of zero-emission regional aircraft: When, what, when and how?" 3.Description of project, methodology and data processing Person responsible for collecting the data: Dr Evangelia Pontika, Lecturer, Centre for Propulsion and Thermal Power Engineering, Cranfield University MK43 0AL, UK. email: evangelia.pontika@cranfield.ac.uk Data manager or custodian: Dr Evangelia Pontika, Lecturer, Centre for Propulsion and Thermal Power Engineering, Cranfield University MK43 0AL, UK. Cranfield Investigators: Dr Evangelia Pontika, Lecturer, Centre for Propulsion and Thermal Power Engineering, Cranfield University MK43 0AL, UK. Prof Panagiotis Laskaridis, Director Net Zero Aviation CDT, Centre for Propulsion and Thermal Power Engineering, Cranfield University MK43 0AL, UK. Funding sources: N/A Methodology: 1. Selection of technology factors that represent enabling systems and their range considering today’s values to future projections. 2. Flight mission analysis using aircraft performance and propulsion system simulations at MTOW. At this stage, the flight mission analysis is considered ‘‘agnostic’’ to technology factors and the propulsion system only understands a power requirement that comes from the combined aircraft mass. 3. Performing system mass estimations using the technology factors from step and the mission energy/fuel to define the pax capability. 4. From step 2 and 3, estimating the in-flight energy per passenger. This is the in-flight figure of merit and an input to the lifecycle emissions and energy estimation. 5. The technology values stop being ‘‘agnostic’’ and they are mapped out to the technology gaps that need to be addressed. The present datasets cover steps 1-4 for a fuel cell aircraft and a battery aircraft, while step 5 can be found within the paper. Sharing and access licence information: CC:BY Associated publications link: https://doi.org/10.1016/j.paerosci.2025.101171 4.File structures: Filename: Fuel Cell aircraft technology exploration.csv Attributes: Range [nmi],FCPD [kW/kg],MPD [kW/kg],CML [kg/m],TMS MF [kW/kg],TMS NPPC [kW/kW],η_{tank},OEW/MTOW,f_{aero},Pax,Flight Energy/Pax (rel),MTOW [kg],OEW [kg],Rated Power [kW],Fuel Burn [kg],Flight Energy/Pax [MJ] Description: This file contains the exploration of the impact of "on-board" technologies on a fuel cell regional aircraft and its aircraft-level figures of merit. The values can be used directly in the lifecycle analysis, to set technology targets and inform roadmaps. Filename: Battery aircraft technology exploration Attributes: Range [nmi],BED [Wh/kg],MPD [kW/kg],CML [kg/m],TMS MF [kW/kg],TMS NPPC [kW/kW],OEW/MTOW,f_{aero},Pax,Flight Energy/Pax (rel),MTOW [kg],OEW [kg],Rated Power [kW],Flight Energy/Pax [MJ/pax] Description: This file contains the exploration of the impact of "on-board" technologies on a battery regional aircraft and its aircraft-level figures of merit. The values can be used directly in the lifecycle analysis, to set technology targets and inform roadmaps. Filename: Fuel Cell aircraft technology scenarios.csv Attributes: Scenario,Range [nmi],FCPD [kW/kg],MPD [kW/kg],CML [kg/m],TMS MF [kW/kg],TMS NPPC [kW/kW],η_{tank},OEW/MTOW,f_{aero},Pax,Flight Energy/Pax (rel),MTOW [kg],OEW [kg],Rated Power [kW],Fuel Burn [kg],Flight Energy/Pax [MJ] Description: This file contains selected technology factor scenarios for the fuel cell aircraft and resulting figures of merit for ranges 200-800nmi. Filename: Battery aircraft technology scenarios.csv Attributes: Scenario,Range [nmi],BED [Wh/kg],MPD [kW/kg],CML [kg/m],TMS MF [kW/kg],TMS NPPC [kW/kW],OEW/MTOW,f_{aero},Pax,Flight Energy/Pax (rel),MTOW [kg],OEW [kg],Rated Power [kW],Flight Energy/Pax [MJ/pax] Description: This file contains selected technology factor scenarios for the battery aircraft and resulting figures of merit for ranges 200-400nmi. Filename: Conventional 50-pax aircraft.csv Attributes: Range [nmi],Fuel Burn [kg],Flight Energy [MJ],Mission CO2 [kg],Pax Description: This file contains the mission-level parameters of a representative, conventional 50-pax aircraft model which is used as a benchmark to calculate the flight energy per pax, the lifecycle CO2 and lifecycle energy of the FC/battery aircraft relative to a conventional 50-pax aircraft. Filename: Conventional 70-pax aircraft.csv Attributes: Range [nmi],Fuel Burn [kg],Flight Energy [MJ],Mission CO2 [kg],Pax Description: This file contains the mission-level parameters of a representative, conventional 70-pax aircraft model which is used as a benchmark to calculate the flight energy per pax, the lifecycle CO2 and lifecycle energy of the FC/battery aircraft relative to a conventional 70-pax aircraft. 5.File formats All files in CSV format (comma delimited) 6.Column headers for tabular data: Column headers relate to the nomenclature used in the paper. Headers also indicate the units. Nomenclature: BED : Battery Energy Density [Wh/kg] CML : Cable Mass / Length [kg/m] f_{aero} : Aerodynamic Efficiency Improvement (drag reduction factor) FCPD : Fuel Cell Power Density [kW/kg] MPD : Motor and Power Electronics Power Density [kW/kg] OEW/MTOW : Operating Empty Weight to Maximum Take-off Weight Ratio TMS : Thermal Management System TMS MF : TMS Mass Factor (Heat Dissipated / TMS Mass) [kW/kg] TMS NPPC : TMS Net Power Performance Coefficient (Heat Dissipated / Additional Consumed Power due to the TMS) [kW/kW] ηtank : Tank Gravimentric Efficiency 7.Disclosure: Due to the very large number of datasets and figures, only the main datasets of the technology exploration directly relating to the parallel coordinate plots and technology scenario figures of the paper have been provided in the present data records. These primary datasets should be sufficient to calculate secondary parameters such as lifecycle metrics. Any additional parameters, paper figures or denser versions of the design space with more steps (useful to fully replicate the 2D maps) can be made available upon request. 8.Versioning: Verson 1.0