Thunder Tiger RL-53H Ringed Redline Engine

Jun 14, 2011 No Comments by

The Thunder Tiger RL-53H Ringed Redline Series Two-Stroke Helicopter Engine (Tower Hobbies stock number L5AHTG02) features CNC construction with a low profile cylinder head which is anodized a bright red. The two-needle carburetor uses a push/pull throttle lever and a heat insulator between the carb and the engine case for consistent performance under demanding flight conditions and cowl enclosures. A ringed piston runs in a composite cylinder liner coating, together with a criss-cross pattern etched on the sleeve wall, with a knife-edged high-strength connecting rod and reinforced resin rear cage ball bearing support for ultra-high performance. Supplied with a  Redline R3 glowplug with platinum alloy filament,  two head shims and an instruction manual, it’s designed to run with heli blend fuels with 10-30% nitromethane and 20% lubricant.

Technical Specs
Displacement: 0.529 cu in (8.27 cc)
Bore: 0.886″ (22.5mm)
Stroke: 0.858″ (21.8mm)
Practical RPM: 2,000 – 21,000
Output: 2.1 BHP/17,000 RPM
Weight: 13.40oz (380g)
Carburetor Settings;
Needle Valve: Three turns from closed position
Mixture Metering Screw: 1/12 – 1/8 turn counter-clockwise

Paul Tradelius

About the author

A regular contributor to Model Airplane News, he is also the columnist for our “Rotor Speed” helicopter column. Paul has been flying RC helicopters since the early ‘80s and now enjoys all types of rotary machines, including scale and aerobatics, and he continues to experiment with modifications to improve performance.
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