OS Engines OS Max 55HZ Hyper

(This text is machine translated) is the latest addition to the OS range for 50 class helicopters. OS 55 HZ features: - Displacement: 8.93 cc - Bore: 23 mm - Stroke: 21.5 mm - RPMs of use: 2,000 - 20,000 - Power: 2.1 ps / 17,000 rpm - Weight: 408g ...