FMS 850mm Ranger Instruction Manual

: June 8, 2024
: Fms

Fms

FMS 850mm Ranger

Product

WARNING

Read the ENTIRE instruction manual to become familiar with the features of the product before operating. Failure to operate the product correctly can result in damage to the product, personal property and cause serious injury.

This is a sophisticated hobby product and NOT a toy. It must be operated with caution and common sense and failure to do so could result in injury or damage to the product or other property. This product is not intended for use by children without direct adult supervision.

This manual contains instructions for safety operation and maintenance. It is essential to read and follow all the instructions and warnings in the manual prior to assembly, setup or use, in order to operate and avoid damage or serious injury.

Safety Precautions

As the user of this product, you are solely responsible for operating in a manner that does not endanger yourself and others or result in damage to the product or the property of others. This model is controlled by a radio signal subject to interference from many sources outside your control. This interference can cause momentary loss of control so it is advisable to always keep a safe distance in all directions around your model, as this margin will help avoid collisions or injury.

Age Recommendation: Not for children under 14 years. This is not a toy.

Never operate your model with low transmitter batteries.
Always operate your model in an open area away from cars, traffic or people.
Avoid operating your model in the street where injury or damage can occur.
Never operate the model in populated areas for any reason.
Carefully follow the directions and warnings for this and any optional support equipment you use (chargers, rechargeable battery packs, etc.)
Keep all chemicals, small parts and anything electrical out of the reach of children.
Moisture causes damage to electronics. Avoid water exposure to all equipment not specifically designed and protected for this purpose.
Never lick or any place of any your model in your mouth as it could cause serious injury or even death.

Safety

Lithium Polymer (Li-Po) Battery Warning

CAUTION: Always follow the manufacturer’s instructions for safe use and disposal of batteries. Fire, property damage, or serious injury can result from the mishandling of Li-Po batteries.

By handling, charging or using a Li-Po Battery you assume all risks associated with lithium batteries. If at any time the batteries begin to swell or balloon, discontinue use immediately!
Always store the batteries at room temperature in a dry area to extend the life of the battery. Always transport or temporarily store the battery in a temperature range of 40-120F. Do not store the battery or model in a car or in direct sunlight. If stored in a hot car, the battery can be damaged or even catch fire.
Never use a Ni-Mh Charger to charge Li-Po Batteries. Failure to charge the battery with a Li-Po compatible charger may cause fire resulting in personal injury and property damage.
Never discharge Li-Po Cells below 3V.
Never leave charging batteries unattended. Never charge damaged batteries. Charging the Flight Battery Warning
Use a battery charger that is designed to safely charge the Li-Po Battery. Read the charger instructions care fully before use. When charging the battery, make certain the battery is on a heat resistant surface. It is also highly recommended to place the Li-Po Battery inside a fire resistant charging bag readily available at hobby shops or online.

Introduction

Skill, know-how and space has always been limiting factors in bringing new enthusiasts into the wonderful world of R/C aviation, until now!
FMS has always been dedicated to enabling pilots of every skill level to enjoy the thrills of flight. Innovation then, is in our DNA. FMS is proud to announce the 850mm Ranger. Like its sibling, the high winged airframe design with a tricycle landing gear, is very easy to fly by default. A dedicated flight control paired with a GPS system allows pilots to fly under beginner, intermediate and fully manual flight modes. An innovative flight perimeter fence and return to home functions provide bulletproof reliability and ease of mind- flying has never been so simple.

Flight perimeter fence function: if the aircraft is in excess of 120m away from the pilot, the aircraft will return to home automatically, with the pilot having the option of taking over the controls at any time. Once over the home point, the aircraft will circle at a 25m altitude at roughly 40km/h.
Return to home function: in the off chance that the pilot loses orientation of the aircraft, the return to home function can be triggered and the aircraft will fly back to the home point. Like the flight perimeter function, this function does not take away the pilots’ ability to control the aircraft at any time. Once over the home point, the Ranger 850 circles until further control inputs are given.

Absolute beginners rejoice! The FMS 850mm Ranger has everything that is needed for flight! A 12A esc/receiver combo reduces the need to connect cables and a 2315-3850kv motor, 7.4V 850mAh 25c battery and four 1.9g micro servos give the lightweight 305g aircraft incredible performance. Fly at a small park, basketball court or even your own back yard!
The innovative 850mm Ranger is the perfect way to start earning your wings!

Features:

Power system: 2315 3850kv motor, 7.4V 850mAh 25C lipo, 4x 1.9g servo, ESC/RX combo
Return to home function
Flight perimeter fence function
0 flying experience necessary

Kit contents

Kit content

Before assembly, please inspect the contents of the kit. The photo below details the contents of the kit with labels. If any parts are missing or defective, please identify the name or part number (refer to the spare parts list near the end of the manual) then contact your local shop or email us: support@fmsmodel.com

Specifications

Wingspan: 850mm(33.5in)
Overall Length: 657mm(25.8in)
Flying Weight: ~290g
Motor Size: 2315-KV3850
Wing Load: 23.6g/dm²(0.05oz/in²)
Wing Area: 12.3dm²(190.5sq.in)
ESC: 12A
Servo: 1.9g Servo x 4
Recommended Battery: 7.4V 850mAh 25C

Model assembly

Landing gear installation

With the fuselage inverted, fit the landing gear assembly into its corresponding slot as sown.
Use the included screws to secure the landing gear plate and landing gear to the fuselage.

Landing gear 2 Main wing installation

Connect the ailerons servo wires to their respective ports then attach the wing onto the fuselage.

Note: Connect the GPS plug and three-in-one integrated receiver the same direction as shown.

Connect the wing struts to the fuselage- Slide the root of the strut into its slot then push aft to lock.
Secure the wings on the fuselage using the included screws as shown.

Assembly 2

Battery installation

Remove the
Adhere the loop side of the hook and loop tape to the
With the battery cables facing aft, Install the battery into the fuselage. Secure with hook and loop

Battery installation

Note: batteries from different manufacturers will vary in weight and size, it is therefore important to check the center of gravity of the aircraft before every flight.

Receiver diagram

The cables from the servo connector board should be connected to your receiver in the order shown. Tuck the wire leads into the recessed cavity towards the rear of the battery hatch.

Get Your Model To Fly

Important ESC and model information

The ESC included with the model has a safe start. If the motor battery is connected to the ESC and the throttle stick is not in the low throttle or off position, the motor will not start until the throttle stick is moved to the low throttle or off Once the throttle stick is moved to the low throttle or off position, the motor will emit a series of beeps. Several beeps with the same tune means the ESC has detected the cells of the battery. The count of the beeps equals the cells of the battery. The motor is now armed and will start when the throttle is moved.
The motor and ESC come pre-connected and the motor rotation should be If for any reason the motor is rotating in the wrong direction, simply reverse two of the three motor wires to change the direction of rotation.
The motor has an optional brake The ESC comes with brake switched off and we recommend that the model be flown with the brake off. However, the brake could be accidentally switched on if the motor battery is connected to the ESC while the throttle stick is set at full throttle. To switch the brake off, move the throttle stick to full throttle and plug in the motor battery. The motor will beep one time. Move the throttle stick to low throttle or the off position. The motor is ready to run and the brake will be switched off.
Battery Selection and Installation. We recommend the 7.4V 850mAh 25C Li-Po If using another battery, the battery must be at least a 7.4V 850mAh 25C battery. Your battery should be approximately the same capacity, dimension and weight as the 7.4V 850mAh 25C Li-Po battery to fit the fuselage without changing the center of gravity significantly.

Transmitter and model setup

Before getting started, bind your receiver with your transmitter. Please refer to your transmitter manual for proper operation. CAUTION: To prevent personal injury, DO NOT install the propel- ler assembly onto the motor shaft while testing the control surfaces. DO NOT arm the ESC and do not turn on the transmitter until the Transmitter Manual instructs you to do so.

Tips: Make sure all control sticks on your radio are in the neutral position (rudder, elevator, ailerons) and the throttle is in the OFF position. Make sure both ailerons move up and down (travel) the same amount. This model tracks well when the left and right ailerons travel the same amount in response to the control stick. Move the controls on the transmitter to make sure the aircraft control surface moves correctly. See diagrams right.

Control throws

The suggested control throw setting for the Ranger are as follows (dual rate setting):

Tips: On the first flight, fly the model in low rate. The first time you use high rates, be sure to fly at low to medium speeds. High rate, as listed, is only for EXTREME maneuvering.

Clevis Installation

clevis installation

Pull the tube from the clevis to the linkage.
Carefully spread the clevis, then insert the clevis pin into the desired hole in the control horn.
Move the tube to hold the clevis on the control horn.

Control horn and servo arm settings

control horn

The table shows the factory settings for the control horns and servo arms. Fly the aircraft at the factory settings before making changes.
After flying, you may choose to adjust the linkage positions for the desired control response.

Check the C.G. (Center of gravity)

Check CG

When balancing your model, adjust the battery as necessary so the model is level or slightly nose down. This is the correct balance point for your model. After the first flights, the CG position can be adjusted for your personal preference.

The recommended Center of Gravity (CG) location for your model is(40-50mm) from the leading edge of the main wing (as shown) with the battery pack installed. Mark the location of the CG on top of the wing.
When balancing your model, support the plane at the marks made on the bottom of the main wing with your fingers or a commercially available balancing stand. This is the correct balance point for your model. Make sure the model is assembled and ready for flight before balancing.

Before flying the model

Find a suitable flying site

Find a flying site clear of buildings, trees, power lines and other obstructions. Until you know how much area will be required and have mastered flying your plane in confined spaces, choose a site which is at least the size of two to three football fields – a flying field specifically for R/C planes is best. Never fly near people – especially children, who can wander unpredictably.

Perform the range check for your plane

As a precaution, an operational ground range test should be performed before the first flight each time you go out. Performing a range test is a good way to detect problems that could cause loss of control such as low batteries, defective or damaged radio components, or radio interference. This usually requires an assistant and should be done at the actual flying site you will be using.
First turn on the transmitter, then install a fully-charged battery into the fuselage. Connect the battery and install the hatch. Remember, use care not to bump the throttle stick. Otherwise, the propeller/fan will turn and possibly cause damage or injury.

Note: Please refer to your Transmitter Manual that came with your radio control system to perform a ground range check. If the controls are not working correctly or if anything seems wrong, do not fly the model until you correct the problem. Make certain all the servo wires are securely connected to the receiver and the transmitter batteries have a good connection.

Monitor your flight time

Monitor and limit your flight time using a timer (such as on a wristwatch or in your transmitter if available). When the batteries are getting low you will usually notice a performance drop before the ESC cuts off motor power, so when the plane starts flying slower you should land. Often (but not always) power can be briefly restored after the motor cuts off by holding the throttle stick all the way down for a few seconds. To avoid an unexpected dead-stick landing on your first flight, set your timer to a conservative 4 minutes. When your alarm sounds you should land right away.

Flying course

TAKE OFF

While applying power, slowly steer to keep the model straight. The model should accelerate quickly. As the model gains flight speed you will want to climb at a steady and even rate. It will climb out at a nice angle of attack (AOA).

Flying

Always choose a wide-open space for flying your plane. It is ideal for you to fly at a sanctioned flying field. If you are not flying at an approved site always avoid flying near houses, trees, wires and buildings. You should also be careful to avoid flying in areas where there are many people, such as busy parks, schoolyards, or soccer fields. Consult laws and ordinances before choosing a location to fly your aircraft. After takeoff, gain some altitude. Climb to a safe height before trying technical manoeuvres, including high speed passes, inverted flight, loops, and point rolls.

Landing

Land the model when you hear the motor pulsing (LVC) or if you notice a reduction in power. If using a transmitter with a timer, set the timer so you have enough flight time to make several landing approaches.
The model’s three point landing gear allows the model to land on hard surfaces. Align model directly into the wind and fly down to the ground. Fly the airplane down to the ground using 1/4-1/3 throttle to keep enough energy for proper flare. Before the model touches down, always fully decrease the throttle to avoid damaging the propeller or other components. The key to a great landing is to manage the power and elevator all the way to the ground and set down lightly on the main landing gear. After a few flights you will find the model can be set down lightly on the mains and you can hold the nose wheel off balancing themodel on the mains until it slows and gently settles the nose.

Maintenance

Repairs to the foam should be made with foam safe adhesives such as hot glue, foam safe CA, and 5min epoxy. When parts are not repairable, see the Spare Parts List for ordering by item number.
Always check to make sure all screws on the aircraft are tightened. Pay special attention to make sure the spinner is firmly in place before every flight.

Trouble shooting

Problem	Possible Cause	Solution

Aircraft will not respond to the throttle but responds to other controls.

|

-ESC is not armed.

-Throttle channel is reversed.

|

-Lower throttle stick and throttle trim to lowest settings.

-Reverse throttle channel on transmitter.

Extra propeller noise or extra vibration.

| -Damaged spinner, propeller, motor or motor mount.

-Loose propeller and spinner parts.

-Propellor installed backwards.

|

-Replace damaged parts.

-Tighten parts for propeller adapter, propeller and spinner.

-Remove and install propeller correctly.

Reduced flight time or aircraft underpowered.

|

-Flight battery charge is low.

-propeller installed backward.

-Flight battery damaged.

|

-Completely recharge flight battery.

-Replace flight battery and follow flight battery instructions.

Control surface does not move, or is slow to respond to control inputs.

|

-Control surface, control horn, linkage or servo damage.

-Wire damaged or connections loose.

|

-Replace or repair damaged parts and adjust controls.

-Do a check of connections for loose wiring.

Controls reversed.

|

Channels are reversed in the transmitter.

| Do the control direction test and adjust controls for aircraft and transmitter.
-Motor loses power

-Motor power pulses then motor loses power.

| -Damage to motor, or battery.

-Loss of power to aircraft.

-ESC uses default soft Low Voltage Cutoff(LVC).

| -Do a check of batteries, transmitter, receiver, ESC, motor and wiring for damage(replace as needed).

-Land aircraft immediately and recharge flight battery.

LED on receiver flashes slowly.

|

Power loss to receiver.

| -Check connection from ESC to receiver.

-Check servos for damage.

-Check linkages for binding.

Spare parts list content

FMSRU101 Fuselage FMSRU114 Screws set

FMSRU102 Main wing set FMSRU115 Wheel set

FMSRU103 Horizontal stabilizer FMSRU116 Sticker

FMSRU104 Cowl FMSPROP057 Propeller

FMSRU105 Battery Door FMSBM039 Motor board

FMSRU106 Spinner FMSDZ026 Motor shaft

FMSRU107 GPS PRKV3850 2315-KV3850 Motor

FMSRU108 Main landing gear set PRESC029 12A ESC (for PNP versiion) FMSRU109 Landing gear cover FMS1.9GDR 1.9g digital gear servo reverse FMSRU110 Supporting bar set FMSTX01 Transmitter

FMSRU111 Steel set FMSRX01 Receiver（three-in-one integrated）

FMSRU112 Front landing light PE2S850/25C Battery 7.4V 850mah 25C (JST plug) FMSRU113 Control horns FMSCHR01 Charger

Visit our website: www.fmsmodel.com to see photo of this product. Enter the key word “ESC” in the search bar for the stock ESC instruction manual

FMS 850mm Ranger Instruction Manual – Download [optimized]
FMS 850mm Ranger Instruction Manual – Download