With the biggest displacement and awesome power, RL-53H(R) is the best choice nitro power plant for your .50 size heli model. Install the new RL-53H(R), you will get the extreme power you never experience before!!

New REDLINE series engine
Biggest displacement with large power
Fix type Carb.
Installed thermal Isolator gasket construction
Ringed piston with XC2 cylinder construction
Push-Pull throttle lever
Anodize Machinery Cylinder Head
LU Type RR Ball Bearing
Reinforce beam structure