The AS-140 Mücke was designed to be broken down into loads and man-packed on expeditions or shipped to destination and then assembled for use. When broken down the aircraft can be packed as 1251NaN1 length X 801NaN1 width X 701NaN1 height package that weighs 550NaN0. It features a single main rotor, a single-seat open cockpit without a windshield, a T-tail, tricycle landing gear without wheel pants and a 250NaN0 Limbach Flugmotoren or 240NaN0 Rockwell International engine in pusher configuration.
The aircraft fuselage is made from bolted-together aluminum tubing, augmented by stainless steel sheet components. Its 61NaN1 diameter two-bladed rotor has a chord of 181NaN1. The permissible installed engine power range is 24to, but due to centre of gravity considerations the engine fitted must weigh no more than 130NaN0. With its empty weight of 550NaN0 and a gross weight of 1900NaN0 the AS-140 has a useful load of 1350NaN0.
The aircraft is supplied assembled, but the manufacturer can supply kits upon request.