O.S. Engine OSMG1555 GT55 Overview for RC Airframes
The O.S. Engine GT55 Gas Engine, identified by its model number OSMG1555, brings thoughtful engineering to RC aircraft powerplants. Built for pilots who value reliable power and straightforward installation, this unit combines durable construction with detail-focused design.
Efficient Cooling and Strong Crankcase Design
Cooling is a focus on this GT55, with extra-deep, thin fins on both the crankcase and head to shed heat during long flights. The single-piece crankcase removes gasket joints, improving alignment and strengthening the assembly for repeatable performance.
Carburetor Placement and Fitment Advantages
The front-mounted carburetor helps keep the carb cooler and promotes steady running. Shorter standoffs reduce movement at the firewall, helping to cut vibration transmission. Throttle and choke linkages install directly for a neat, dependable control setup.
IG-01 Ignition Details and Starting Behavior
The IG-01 Capacitive Discharge Ignition uses a microcomputer to manage spark timing and magnetic sensing to detect timing reliably. It supports quick starts, compensates for wet plugs, and keeps standby current low for practical field use.
Specifications
- Displacement: 3.352 cu in (54.93 cc)
- Bore: 1.62 in (41.2 mm)
- Stroke: 1.62 in (41.2 mm)
- Practical RPM: 1,500-8,000
For experienced model pilots seeking a dependable gas engine, the O.S. Engine GT55 balances cooling efficiency, robust construction, and a modern ignition system for predictable flight performance.
