For over-the-top flying excitement, the 50SX-H Ringed Hyper engine is the clear favorite! The Hyper version weighs less than the 50SX-H, but delivers more horsepower for higher rotor speeds. ...

Specification Displacement(c.c. / cu.in.) 8.67 c.c / 0.529 cu.in  Bore(mm / in.) 22.5 mm / 0.886 in  Stroke(mm / in.) 21.8 mm / 0.858 in  ...