Freewing Zeus 90mm EDF Sport Jet User Manual

Introduction

Thank you for purchasing the Freewing 90mm EDF new sport jet, the ZEUS 90! Please read these instructions carefully before assembly and adjustment. If you encounter problems, refer to the instructions or contact your distributor.

The Freewing ZEUS is a new, large-sized electric EPO sport jet with a blue, grey, and white color scheme. Its low drag shape and efficient inlet design contribute to achieving the design goals.

Structure

The Zeus fuselage is divided into two sections (front and rear) for reduced packaging volume and environmental impact. The main wing and fuselage utilize a QUICK II screw-less portable install structure for rapid assembly without screws or glue. The horizontal tail and vertical tail also use a screw fastening structure, optimized for easier assembly.

Strength

The main wing is constructed from 25x EPO raw material, reinforced with built-in carbon fiber tubes for improved rigidity, suitable for 5KG level turbojet engines. The vertical tail and fuselage are made of 35x EPO raw materials, also reinforced with carbon fiber tubes. This combination of materials ensures higher strength while controlling weight.

The PNP version is equipped with a 90mm 12-blade EDF power system (#E72216) and a 6S/8S 120A ESC, featuring a reverse thrust function for faster landing. All control surfaces are managed by 7pcs 17G metal gear servos. The front cabin door and front wheel steering are controlled by individual 9G MG servos. Ribbon cables connect control surfaces to the control box for a tidier battery compartment.

Since its inception in 2009, Freewing has continuously optimized its sport jets. The Zeus sports jet offers powerful thrust-to-weight ratio for fast acceleration and high top speed. Its relatively low wing loading provides excellent low-speed performance for easier landings. The aircraft exhibits excellent longitudinal and lateral static stability, simplifying operation and enhancing the learning experience for stunt actions.

Important Notes

• This is not a toy. Not for children under 14 years. Adult supervision is required for users under 14.
• Operate under the guidance of professional players if you are a beginner.
• Freewing and its vendors are not responsible for losses due to incorrect operation.
• Model plane players must be at least 14 years old.
• The EPO material is spray-painted; avoid chemical cleaners to prevent damage.
• Avoid flying in restricted areas such as public places, high-voltage-intensive areas, near highways, or airports.
• Do not fly in adverse weather conditions like thunderstorms or snow.
• Store batteries safely, away from flammable or explosive materials.
• Recycle damaged or scrap batteries properly to prevent spontaneous combustion.
• Handle waste properly at the flying field; do not abandon or burn it.
• Always ensure the throttle is in the low position and the transmitter is switched on before connecting the LiPo battery.
• Do not attempt to catch the plane by hand during flight or slow landing; wait for it to stop completely.

Product Basic Information

Standard Version:

• Wingload: 150 g/dm²
• Wing Area: 24 dm²
• Servos: 9g Hybrid digital servo (2pcs), 17g MG digital servo (7pcs)
• Motor: 3668-1960KV I/R Motor
• ESC: 120A with 8A UBEC (Thrust Reverse Function)
• Ducted Fan: 90mm 12-blade fan
• Weight: 2820g (w/o Battery)

Other Features:

• Material: EPO
• Aileron: Yes
• Elevator: Yes
• Flaps: Yes
• Rudder: Yes
• Landing Gear: Electric landing gear
• Cabin Door: Yes
• Recommended Li-Po Battery: 6S 5000-6000mAh

Package List:

Different equipment includes different spareparts. Please refer to the following contents to check your sparepart list.

PNP Assembly Instructions

Install Fuselage

1. Install Ø6 conical plastic parts onto the carbon tube.

2. Insert the elevator servo extension wire of the tail fuselage into the ELE interface of the PCB control board.

3. Install the rear fuselage onto the fuselage and fix it with screws (KA3X10mm 2pcs).

Diagram showing the connection of the elevator servo extension wire and the attachment of the rear fuselage.

Install Horizontal Stabilizer

1. Connect the elevator servo cables and extension wire of the tail fuselage, then fix the plug on the buckle of the tail fuselage.

2. Use screws (KA3X10mm 4pcs) to install the horizontal tail onto the tail fuselage.

Diagram showing the connection of servo cables and the installation of the horizontal stabilizer.

Install Vertical Stabilizer

1. Insert the vertical tail servo cable onto the PCB board and into the RUD interface.

2. Fix the installed vertical stabilizer to the fuselage with screws (KA3X10mm 5pcs).

Diagram showing the connection of the vertical tail servo cable and the attachment of the vertical stabilizer.

Install Main Wing

1. Press the main wing screw-less quick install switch to unlock it.

Diagram illustrating the unlock status of the main wing quick install switch, where the button pops up.

2. Pull the rotary button on the rear cabin door to open it and adjust the rotary button to the state for main wing installation.

Diagram showing the rotary button and the open rear cabin door.

3. Install Ø12 conical plastic parts onto the carbon tube (Ø12x400mm).

4. Install the Ø10 conical plastic parts onto the carbon tube of the left/right main wing.

5. Connect the ribbon cable to the side PCB board of the left/right wing.

6. Close the rear cabin door and push the main wing into its installation position on the fuselage (repeat for the other main wing).

Diagram showing the main wing being attached to the fuselage.

7. Press the 4pcs main wing screw-less quick install switches to the locked state.

8. Shake the main wing to confirm it is locked. The main wing is now secured.

Diagram showing the locked status of the main wing quick install switch.

Install Nose Cone

Diagram showing the nose cone with a magnet for attachment.

Install Battery

Battery size: 6S 5000~6000mAh, Battery weight: 750g

Battery cabin size: L=250mm, W=80mm, H=72mm

Recommended LiPo battery: 6S 22.2V 5000mAh ~ 6S 22.2V 6000mAh, Discharge rate of C ≥ 35C

Before connecting the battery and receiver:

• Switch on the transmitter power.
• Ensure the throttle stick is in the lowest position.
• Bind your receiver to your transmitter according to the transmitter's instruction manual.

Diagram showing the battery compartment and recommended battery placement.

Pushrod Instructions

Detailed measurements and mounting hole locations for pushrods for the following control surfaces:

• Nose gear steering
• Nose cabin door
• Rear cabin door
• Aileron
• Flap
• Elevator
• Rudder

Diagrams illustrating pushrod lengths and mounting hole positions for each control surface.

Important Additional Notes

The Y-type clevis is equipped with a transparent silicone ring for secondary reinforcement to prevent accidental loosening. When buckling the clevis into the control surface horn, use the silicone ring to cover the clevis.

Diagrams showing the three steps for securing the clevis with the silicone ring.

Center of Gravity (CG)

Correct CG is crucial for safe aircraft stability and responsive control. Adjust the CG by moving the battery forward or backward. If the recommended CG cannot be achieved by battery placement, a counterweight can be installed. However, with the recommended battery size, a counterweight is typically not required.

The center of gravity is marked on the bottom of the main wing. Please confirm the CG based on this marked position.

CG: 120mm

Diagram showing the location of the CG mark on the underside of the main wing.

Dual Rates

Recommended parameters for Aileron/Elevator Rate. Program preferred Exponential % in your radio transmitter. Use High Rate for the first flight, and switch to Low Rate for lower sensitivity. Adjust Rates and Expo on subsequent flights to suit your preference.

Diagrams showing the deflection of control surfaces for Aileron, Elevator, Rudder, and Flaps with H1 and H2 measurements.

Remote Control EXP Setting Suggestion

Aileron EXP Curve: Futaba: EXP A -30, EXP B -30; Spektrum: EXPO 30% 30%

Elevator EXP Curve: Futaba: EXP A -30, EXP B -30; Spektrum: EXPO 30% 30%

Graphs illustrating suggested EXP curves for Aileron and Elevator.

PNP Parameter Setting

Flight Note

A Flap-to-Elevator Mix is recommended for stable landings with deployed flaps. Use 2mm Down elevator mix with low rate flaps, and 4mm Down elevator mix with high rate flaps.

Control Direction Test

After installing the plane, connect a fully charged battery to the ESC. Use the radio to test and verify that all control surfaces are working correctly.

• Aileron: Stick Left moves ailerons down/up respectively; Stick Right moves ailerons up/down respectively.
• Rudder: Stick Left moves rudder left; Stick Right moves rudder right.
• Elevator: Stick down moves elevator down; Stick up moves elevator up.
• Flaps: Flaps down deploy the flaps.

Diagrams illustrating the correct direction of movement for Aileron, Rudder, Elevator, and Flaps based on stick input.

Pre-Installed Component Overview

Servo Direction

Servo positive or reverse rotation is defined by the servo arm's movement when the input signal changes from 1000µs to 2000µs. Clockwise rotation is positive; counterclockwise rotation is reverse.

If purchasing other brand servos, refer to the following list for suitable options:

Motor Specification

Model: 3668-1960KV

Diagrams showing the dimensions and specifications of the motor.