REDLINE is a new engine product line of Thunder Tiger. High performance, and extreme power will be the main features of this series engine. RL-53H(R) helicopter engine is the first engine in this series.
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!!

RL53H Features

New REDLINE series engine
Biggest displacement with large power in the .50 class heli engine
Fix type Carb. Installed with 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

Specifications:
Bore (mm/in): 22.5/0.886 
Displacement (cc/cu.in): 8.67 / 0.529 
Output (BHP/RPM): 2.1/17000 
Practical RPM: 2000-21000 
Stroke (mm/in): 21.8/0.858