Helicopter Market Size, Share & Industry Analysis, By Weight Class (Light, Light-Twin, Intermediate, Medium, and Heavy-Lift), By Propulsion Architecture (Piston, Turboshaft, Hybrid-Electric, and Fully Electric), By Technology Adoption Level (Conventional, Digitally Enhanced, and Autonomy-Enabled), By Revenue Stream (New Sales, Aftermarket, and Training), By Rotor System (Single Main Rotor, Fenestron, NOTAR, and Tandem), By Ownership Model (Direct Ownership, Contracted Operations, and Leasing), By End User (Commercial, Government, Defense, and Private), and Regional Forecast, 2026-2034