The 50SX-H combines balance with usability in any 50 class helicopter. This popular engine is now offered with even more power. The cooling efficiency has been improved using a new blue anodized heat sink head. The new head design offers greatly improved combustion efficiency which delivers stable power for hovering and aerobatic flight. The specially designed carburettor has a large, 10mm diameter intake which gives the engine even more stability. The "MAX-50SX-H RING Hyper" brings even higher performance to the many modelers flying in this class. Another example of O.S.'s untiring quest for excellence.