SPEED 400 m.Kompakt-Getr. 4:1 Graupner 1718 with SPEED 400 6 V motor. This extremely compact, lightweight geared motor system is the ideal choice for small lightweight gliders up to about 1000 g all-up weight, in conjunction with the CAM GEAR PROP folding propeller, No. 1324.28.20. Small NC packs (0.5–0.8 Ah capacity) should be used exclusively. Spare ballbearing No. 221
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