Century Radikal G20 User Manual

Kit Features:
Specifications:
Lightweight yet extremely strong G10 or carbon fiber frames.
High gloss large diameter 25mm tail boom with belt drive system.
Blade grips accommodate blades 12mm (LT) to 18mm (HD) blade roots.
300 mL fuel tank for long engine run time.
Convenient and easy access to spark plug.
Triple bearing supported blade grips and tail blade grips.
Machined center dual ball bearing swashplate for 120 degree CCPM.
Adjustable bell-hiller ratio allows tuning for preferred cyclic response (HD)
Tunable flight characteristics for stability or speed.
Length: 1366mm
Height: 381mm
Width: 260mm
Main rotor diameter: 1435mm
Tail rotor diameter: 262mm
Main rotor blades: 600mm-640mm
Tail rotor blades: 95mm
Version 1.10
© 2010 Century Helicopter Products - All rights reserved.

Century Radikal G20 Specifications

General

Brand	Century
Model	Radikal G20
Category	Toy
Language	English

Summary

Introduction to Radikal G20 Helicopter

Radikal G20 Safety Warning

Warns that the model is not a toy and requires proper assembly and setup for safety.

Pre-Flight and Flying Guidelines

General Assembly and Setup Advice

Radikal G20 Required Items and Warranty

Essential Tools, Fluids, and Components

Lists essential tools, fluids, and consumables needed for assembly and operation.

Radikal G20 HD Head Assembly - Bag 1

HD Head Assembly Steps (Bag 1)

Instructions for assembling the head using components from Bag 1 (HD Version).

Radikal G20 LT Head Assembly - Bag 1

LT Head Assembly Steps (Bag 1)

Instructions for assembling the head using components from Bag 1 (LT Version).

Radikal G20 HD Head Assembly - Pushrods and Flybar

Radikal G20 LT Head Assembly - Pushrods and Flybar

Pushrod and Flybar Assembly Procedure

Details the assembly of the pushrods and their connection to the flybar control arms.

Flybar and Paddle Alignment Guide

Radikal G20 HD Head Assembly - Bell Mixer and Grips

Main Rotor Blade Grip Assembly

Radikal G20 LT Head Assembly - Dampers and Bell Mixer

Blade Grip and Damper Installation

Bell Mixer Arm Assembly

Radikal G20 HD Head Assembly - Washout and Rotor Head

Radikal G20 LT Head Assembly - Washout and Rotor Head

Washout Guide and Rotor Head Installation

Set Screw Tightening Procedures

Radikal G20 Swashplate and Washout Assembly

Radikal G20 LT Swashplate and Washout Assembly

Ball Link Attachment Procedure

Radikal G20 HD Head Pushrod Length Adjustment

HD Pushrod Length Measurement Diagram

Provides a 1:1 scale diagram for measuring and setting pushrod lengths.

Radikal G20 LT Head Pushrod Length Adjustment

LT Pushrod Length Measurement Diagram

Provides a 1:1 scale diagram for measuring and setting pushrod lengths.

Radikal G20 Skeletal Support Brace Assembly

Bag 2: Skeletal Support Brace Assembly

Instructions for assembling skeletal support braces using components from Bag 2.

Bearing and Threadlock Notes

Radikal G20 Left Rear Sideframe Assembly

Bag 2: Left Rear Sideframe Assembly

Instructions for attaching the left rear sideframe using components from Bag 2.

Bearing and Threadlock Application

Radikal G20 Fuel Tank Assembly

Bag 2: Fuel Tank Fitting Assembly

Instructions for assembling the fuel tank fittings and components from Bag 2.

Fuel Tank Assembly Steps

Detailed steps for bending vent tubes, attaching lines, and securing the tank assembly.

Radikal G20 Right Rear Sideframe Assembly

Bag 2: Right Rear Sideframe Assembly

Instructions for assembling the right rear sideframe using components from Bag 2.

Bellcrank Assembly Instructions

Radikal G20 Clutchbell Assembly

Bag 2: Clutchbell Assembly Steps

Instructions for assembling the clutch bell using components from Bag 2.

Shaft Alignment and Securing

Details aligning the starting shaft, hex coupler, and securing with set screws.

Bearing Block Installation Procedure

Zenoah 20cc Engine Preparation

Propeller Hub Removal Procedure

Key Component Retention for Assembly

Emphasizes retaining a specific key for mounting the fan and clutch assembly.

Radikal G20 Clutchshoe and Fan Assembly

Bag 3: Clutchshoe and Fan Assembly

Instructions for assembling the clutch shoe and fan using components from Bag 3.

Dry Fitment and Shim Check

Fan Shroud Mount Plate Installation

Radikal G20 Front Side Frame Assembly

Bag 3: Front Frame Attachment

Instructions for attaching front side frames using components from Bag 3.

Electronics Tray Alignment Procedure

M3x8 Screw Tightening Process

Radikal G20 Motor Mounting Procedure

Bag 2: Motor Mounting Steps

Instructions for mounting the motor using components from Bag 2.

Engine Plate and Bearing Alignment

Pinion Gear Meshing Procedure

Notes on keeping parts loose until pinion gear meshes with the main gear.

Radikal G20 Attaching Front Frame Assembly

Bag 2: Front to Rear Frame Attachment

Instructions for attaching front frames to rear frames using components from Bag 2.

Keyed Split Alignment Importance

M3x8 Screw Tightening with Threadlock

Radikal G20 Landing Gear Installation

Landing Gear Package Components

Instructions for installing landing gear struts and skids.

Landing Skid and Strut Attachment

Skid Stopper and Strut Tightening

Radikal G20 Main Gear Assembly

Bag 3: Main Gear Assembly Steps

Instructions for assembling the main gear using components from Bag 3.

Gear, Hub, and Shaft Assembly

Shaft Sleeve Cleaning and Lubrication

Radikal G20 Attaching Head and Main Gear

Bag 3: Head and Main Gear Attachment

Instructions for attaching the head and main gear assembly using components from Bag 3.

Shaft, Bearing, and Set Screw Installation

Details inserting the main shaft, lining up bearings, and securing with set screws.

Mast Stopper Installation Procedure

Radikal G20 Tail Boom Components Assembly

Bag 4: Tail Boom Component Assembly

Instructions for assembling tail boom components using items from Bag 4.

Tail Gearbox and Hardware Mounting

Tail Control Rod Assembly Guide

Radikal G20 Tail Gearbox Assembly

Bag 4: Tail Gearbox Assembly Steps

Instructions for assembling the tail gearbox using components from Bag 4.

Bearing Retainer Correct Pressing

Tail Boom Clamping Procedure

Instructions for clamping the tail gearbox to the boom and checking boom visibility.

Radikal G20 Tail Rotor Assembly

Tail Rotor Assembly Steps

Details pressing bearings, greasing thrust bearings, and tightening assemblies.

Blade Tension and Rotation Settings

Radikal G20 Transmission Case Assembly

Bag 4: Transmission Case Assembly

Instructions for assembling the transmission case using components from Bag 4.

Pulley Orientation and Belt Twist

Belt Tension Adjustment Guide

Guidance on adjusting belt tension for optimal performance and avoiding drag.

Radikal G20 Attaching Tail to Main Frame

Bag 4: Tail to Main Frame Attachment

Instructions for attaching the tail assembly to the main frames using components from Bag 4.

Gear Mesh Verification Process

Detailed steps for verifying proper gear mesh using paper.

Boom Support Posts Installation

Radikal G20 Servo Installation Procedure

Bolts Bag: Servo Installation

Instructions for installing servos and related components from the Bolts Bag.

Servo Mounting Tab Securing

Radikal G20 Pushrod Length Adjustment

Pushrod Length Measurement Guide

Provides diagrams and measurements for adjusting various pushrod lengths.

Radikal G20 Muffler Attachment

Muffler Installation and Securing

Stock Muffler Safety Warning

Warns about the dangerous positioning of the stock muffler tip and suggests deflection or replacement.

Radikal G20 Main Blade Mounting

Wood Blade Gluing Preparation

Final Build and Setup Advice