In　view　of　the　inherent　disadvantages　of　large　footprint,　complex　structure　and　heavy　weight　of　linear　catapult　device,　this　paper　proposes　an　electromagnetic　ejection　and　arresting　gear　with　a　single　axis　integrated　steel　cable　drive.　The　gear　consists　of　permanent　magnet　energy　storage　motor,　eddy　current　clutch,　eddy　current　brake　and　winding　wheel.　The　structure　and　working　principle　of　the　gear　are　introduced.　The　electromagnetic　theoretical　models　of　eddy　current　clutches　and　eddy　current　brakes　are　developed　based　on　the　Ampere　loop　theorem.　By　comparing　the　results　with　3-D　finite　element　calculations,　the　electromagnetic　characteristics　of　eddy　current　clutch　and　eddy　current　brake　are　analyzed.　The　correctness　and　effectiveness　of　the　electromagnetic　theoretical　model　are　verified　using　a　small-scale　experimental　prototype　of　the　eddy　current　brake.　Finally,　a　dynamic　analysis　of　the　electromagnetic　ejection　and　arresting　gear　is　conducted.　The　results　indicate　that　the　gear　can　accelerate　a　30　000　kg　aircraft　from　0　m/s　to　70　m/s　within　2-1　s.　And　it　can　also　make　a　72　m/s　aircraft　stop　in　2-6　s,　meeting　the　design　requirements.　©　2024　China　Ordnance　Industry　Corporation.　All　rights　reserved.