OMPHOBBY FLIGHT SYSTEM 3 User Manual

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Summary of Contents for OMPHOBBY FLIGHT SYSTEM 3

Page 2 Intentionally left blank...
Page 3: Introduction
Introduction Congratulations on your purchase of the all new OMPHOBBY Flight System 3, the most advanced offering in micro helicopter flight control technology today! OFS3 has been developed, validated and perfected over a period of two years and through thousands of test flights to deliver unparalleled flight performance for novices and 3D champions alike.
Page 4: Table Of Contents
Table of Contents Introduction...................................... 1 Table of Contents.....................................2 Important Notes....................................3 Safety Notes....................................3 Additional Components Required For Use............................4 Flying OFS3 Equipped Models................................ 4 OFS3 Feature and Capabilities Overview............................5 Flight Modes.................................... 5 3D Mode..................................5 Attitude Mode.................................. 5 Receiver Connectivity................................6 Setup Capabilities..................................6 LEDs and Button................................
Page 5: Important Notes
Models must always be inspected before every usage for potential defects, issues or malfunctions. Information Recency Notes This manual is subject to updates and revisions without prior notice. latest documentation OMPHOBBY products, please visit the official support page at omphobby.com. You can also access it by scanning the adjacent QR code.
Page 6: Additional Components Required For Use
Additional Components Required For Use Component Recommended Alternative Alternative Receiver ELRS Receiver DSM2/X Receiver S.BUS Receiver Transmitter ELRS Compatible DSM2/X Compatible Compatible Transmitter Transmitter Transmitter Features Full Telemetry Safety Switch Flying OFS3 Equipped Models Below you will find a recommended checklist for safe operation of your model with OFS3.
Page 7: Ofs3 Feature And Capabilities Overview
OFS3 Feature and Capabilities Overview OFS3 is an advanced multi-axis flight control system with 3D and self leveling capabilities, developed from the ground up to deliver both exceptional stability and unparalleled 3D performance for micro helicopters. It comes with a full suite of features, which will be outlined in this chapter.
Page 8: Receiver Connectivity
OFS3 seamlessly connects to the OMPHOBBY app on iOS and Android through the included Bluetooth® module. The OMPHOBBY app allows the user full customization of all core flight control parameters, providing access to every single value that makes OFS3 fly. This includes full PIDF gain access, rotation rates, control deadband values, vibration filters, stick exponentials, software throttle mode, TALY parameters, and more.
Page 9: User Feedback
User Feedback Special attention in OFS3’s development was paid to the flight characteristics, incorporating user feedback on previous iterations of OFS. While OFS3’s flight code has been rewritten from the ground up and contains not a single line of previous OFS flight code, certain comparisons with the previous generation of OFS, specifically on M2 V2 and M2 EVO, can be drawn.
Page 10: Ofs3 Helicopter Component Connections
OFS3 Helicopter Component Connections OMPHOBBY Flight System 3 requires the following connections to fly a helicopter: ● Receiver ● Servos ● Main Motor ● Tail Motor ● Battery Servo Connections purchased OFS3 installed OMPHOBBY helicopter, the servos are already connected. Refer to this section if you are retrofitting a helicopter with OFS3, or if you need to reconnect the servos during a repair.
Page 11: Motor Connections
Motor Connections If you purchased OFS3 installed in an OMPHOBBY helicopter, both motors are already connected from the factory. Refer to this section if you are retrofitting a helicopter with OFS3, or if you need to reconnect the motors while repairing a helicopter.
Page 12: Receiver Connection
Receiver Connection OFS3 supports the following receiver protocols: ● CRSF (ExpressLRS / CROSSFIRE / Tracer) ● DSM2/DSMX ● S.BUS The receivers’ respective connection details will be outlined in the following chapters. Pure PWM receivers are not supported. CRSF (ExpressLRS, CROSSFIRE, and Tracer) OFS3 supports the CRSF receiver protocol with full telemetry return.
Page 13: Elrs Module Settings
ELRS Module Settings When using ELRS, the transmitter module should be configured to match the receiver being used. The following settings are recommended as a baseline and have been tested with OFS3. As Channel 6 is used for throttle, the ELRS Switch Mode should be set to 8ch to allow for the maximum possible resolution and range.
Page 14: Crsf Telemetry Sensors
CRSF Telemetry Sensors OFS3 supports a variety of CRSF telemetry sensors. However, due to the CRSF protocol, not all items can be returned in the correct sensor, as they were not considered by the creators of the CRSF protocol. Therefore, OFS3 returns main rotor RPM in the Altitude sensor and ESC temperature in the Heading sensor.
Page 15: S.bus And Dsm2/Dsmx
DSM2/X have been unified. Therefore, both protocols require identical transmitter settings, and will be discussed in the same section. DSM2/DSMX Physical Connection DSM2/DSMX satellites should be connected as shown in the adjacent diagram. OMPHOBBY part number OSHM2074 can be used for receiver connection. Receiver OSHM2074 Purpose 3.3 V...
Page 16: Dsm And S.bus Channel Mapping And Ranging
MULTI-Module. Futaba transmitters must extend all channel ranges to 119%, or toggle S.BUS Range from “Wide” to “Futaba” in the OMPHOBBY app. Values are either listed as Min / Center / Max, or as ranges. Ch. Function Transmitter % Range Transmitter PWM (µs)
Page 17: Bluetooth® Module
Saving parameters is only supported when the motor is stopped. Firmware updates to OFS3 can be performed through the Bluetooth® module and the OMPHOBBY app for iOS and Android. To find the latest firmware for your helicopter, please visit the support page at omphobby.com.
Page 18: Flight Controller Setup
Configuration of the flight controller can be performed in button mode or with the OMPHOBBY mobile application with Bluetooth® module. Flight Controller LEDs OFS3 provides an array of ten LEDs for simplified...
Page 19: Status Indicator Led Codes
Status Indicator LED Codes LED 1 is RED. LED 2 is BLUE. These LEDs are used to display information about OFS3’s state to the user. Their location in the array is shown on page 16. State LED 1 and LED 2 Message Before Init LED 1 ON...
Page 20: Entering Setup Mode (Button Configuration)
Entering Setup Mode (Button Configuration) 1. Power on the transmitter. 2. Power on the model and wait for the flight controller to initialize. 3. Press and hold the SET button for 3 seconds to enter setup mode. The tail motor will emit a sequence of beeps to confirm successful setup mode entry. The LEDs will change state and begin blinking according to the onboard LED menu once setup mode has been successfully entered.
Page 21: Rate, Feedforward And Gain Settings
D, and F gains, control deadbands, servo travel limits and reverses, vibration filtering, TALY gains and more, the Bluetooth® module in combination with the OMPHOBBY smartphone app for iOS and Android is required. The default expert parameters are equivalent to all LEDs being set to 5 flashes.
Page 22: Servo Settings
SERVO Settings The SERVO menu allows the user to fine-tune their servo centering, as might be necessary after replacing a servo arm or servo after sustaining damage from a collision with terrain. Once the SERVO menu is entered, the transmitter control axes will each be assigned to a servo for fine-tuning its center.
Page 23: Additional Functionality
Additional Functionality Flight Controller Tuning Parameter Reset OFS3 supports tuning parameter reset. This reset does neither reset servo settings or collective adjustments, nor the selection of Software Throttle mode and output adjustments – it only affects parameters directly related to the flight control loops and will return them to factory defaults, both for the LED menu and app-adjusted expert parameters.
Page 24: Attitude Mode Calibration
Attitude Mode Calibration In attitude mode, the model will always return to level once the cyclic controls are released. To achieve this, OFS3 aligns the model’s pitch and roll orientations with the local gravity vector of the Earth, intending to provide a reproducible level attitude. While this is not a position hold mode, minimizing lateral drift of the model in this mode can be desirable for the user.
Page 25: Setting Rpm By Throttle Percentage
OFS3. While the model can technically be set to run higher rotor speeds by increasing throttle beyond 100%, this is not permitted or endorsed by OMPHOBBY, might lead to the destruction of the model, will void the product warranty and happens solely at the user’s responsibility. ⚠...
Page 26: Software Throttle Special Mode
Specifically for those users who wish to use more than one OFS3 equipped model with a single model memory, OFS3 offers a special mode called Software Throttle. This is disabled by default, and can be enabled through the OMPHOBBY app’s Expert Settings.
Page 27: Helicopter Mechanical Setup
Helicopter Mechanical Setup Example: M2 EVO MK2 While the M2 EVO MK2 comes ready to fly and pre-set from the factory, it might be necessary to redo the mechanical setup after performing repairs, or when retrofitting an existing model with OFS3.
Page 28: Bluetooth® Configuration
Bluetooth® Configuration OMPHOBBY Flight System 3 supports configuration and firmware update via the included Bluetooth® dongle. To connect to the iOS / Android application: 1. Download the OMPHOBBY application from the Apple App Store or Google Play Store. 2. Connect the Bluetooth® adapter with the corresponding port on your OFS3 Flight Controller, as shown on page 15.
Page 29: Updating Ofs3'S Firmware
New firmwares can conveniently be installed via the OMPHOBBY smartphone app for iOS and Android. ⚠ Only download and flash official OFS3 firmwares from omphobby.com. Do not download or install firmwares from anywhere else on or off the internet.

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