Aircraft Micro Turbine Market Size, Share & Covid-19 Impact Analysis, By Micro Engine Type (Turboshaft, Turbojet, and Turboprop), By Fuel Type (JET-A-1, Diesel, Kerosene, Natural Gas, and Sustainable Aviation Fuel), By Application (VTOL, Air Taxi, RC planes, and UAVs) and by End-User (Commercial and Military) and Regional Forecast, 2021-2028