There is no standard aircraft utilized in medEvac operations. Airplanes (fixed-wing aircraft) vary in size from single-engine turboprops such as the Pilatius PC-12 to twin-engine aircraft like the Cessna Citation, Beech B-200, and Lear 35. Most are either turboprop or jet aircraft which lends to faster, more versatile performance. In helicopter operations, again, no one make or model is the standard. Helicopters are chosen for a myriad of reasons such as payload capability, range, economy of operation, and geographic location. The most common helicopters found in medEvac use are the Bell 206/407, and Eurocopter AS-350 for single-engine aircraft. For multi-engine the medium sized Bell 222/230, Eurocopter BO-105, BK-117, and Agusta A-109 are widely used. The largest multi-engine helicopters in service with medEvac services across the nation are the Sikorsky S-76, Bell 412, and the Eurocopter AS-365. All aircraft used in medEvac operations have proven themselves with thousands of safe transports.