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Wren Turbines 44i Kerostart - User Manual

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Wren 44i Kerostart HELICOPTER ENGINE
Owner’s Manual
April 2014
Excite your sensors!
Unique, miniature gas turbine two-stage
engine, fully internal automatic starting
(no-gas req’d), kerosene fuelled,
precision gearbox.
Up to 7hp (5.2kw) of output shaft power
up to 20k rpm, for superb performance
in sport, scale or 3D aerobatics.
Gearbox matches OS91H dimensions
and accessories.
Many airframe conversions available.
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Summary

Introduction and Safety

Essential Safety Precautions

Covers critical safety guidelines including fire, hot parts, and general handling of the turbine engine.

Technical Specifications and System Overview

Weights and Physical Measures

Details component weights, physical dimensions, and mounting specifications of the engine.

Engine Performance Metrics

Lists RPM ranges, power output, torque, and gearbox ratio for optimal operation.

Two-Shaft Drive System Explained

Explains the fundamental operational principle of the two-shaft gas turbine engine.

Gearbox Arrangement and Locking Procedure

Provides instructions on how to secure the output shaft for attaching clutch and fan components.

Installation and Ancillary Components

Comprehensive Safety Notes

Covers critical safety aspects like engine handling, heat hazards, and appropriate operation environment.

Installation Guidelines and Requirements

Details requirements for engine air intake, ventilation, mounting, and electrical/fuel line connections.

Ancillary Components Overview

Describes the Engine Control Unit (ECU) and its display terminal for engine management.

Fuel Pump and Valve System

Details the fuel pump, burner valves, and their necessary connection requirements.

Fuel, Lubrication, and Operation Basics

Fuel Requirements and Filtration

Specifies recommended fuels and the importance of filtering at each stage of use.

Lubrication Oil Guidelines and Mixing

Details oil-to-fuel ratios, suitable oils, and proper mixing instructions for the engine.

Ground Running Prohibition

Warns against running the engine at full power on the ground due to significant safety risks.

Engine Setup and Starting Procedures

Configuring the ECU for Transmitter Control

Guides users through configuring the ECU and transmitter for optimal engine operation.

Failsafe Programming for Engine Shutdown

Explains failsafe programming to ensure engine shutdown upon radio link loss or interference.

Mechanical and Electrical Connections for Starting

Details the mechanical and electrical hookups required for the engine's kerosene start system.

Engine Start-up and Acceleration

Describes the engine start-up sequence and the process of engine acceleration.

Flying and Troubleshooting

Throttle Curve for 3 D Flying and Dynamics

Discusses setting the throttle curve for 3D flying and understanding helicopter dynamics.

Common Symptoms and Troubleshooting Actions

Lists common engine issues, their potential causes, and recommended troubleshooting actions.

Wren Turbines 44i Kerostart Specifications

General IconGeneral
BrandWren Turbines
Model44i Kerostart
CategoryEngine
LanguageEnglish

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