Completed Projects KPV-ZPU-4 R2800 Engine M274-A5 Mechanical Mule Allison 250 Gas Turbine Starbase Cessna Douglas A-4C “Skyhawk” Hiller H-23 “Raven” Bell OH-58 “Kiowa” Beechcraft AT-11 “Kansan” Douglas A-26 “Invader” Dodge M37 Cargo Truck