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    The Blade mCX Tandem Rescue’s 5-in-1 control unit features a soft low 

voltage cutoff (LVC) that occurs when the battery reaches 3V under load.  

When the soft cutoff occurs, the ESCs of the 5-in-1 unit will reduce power 

to the motors (regardless of the power level you have set with the throttle 

stick), and the RED LED will blink in order to prevent the voltage of the 

battery from dropping below 3V.  This reduction in power usually requires 

that you land the model immediately, at which point you should power 

down the model and unplug the flight battery. 

    Though it is possible to power the model up and to fly again after the 

soft LVC occurs, this is NOT recommended. Continued discharging to the 

soft LVC will cause permanent damage to the Li-Po battery that results in 

lost power and duration when using the battery for subsequent flights, or 

failure of the battery entirely.  Continued attempts to further discharge 

the battery may also result in loss of control while the motors are running 

as the voltage of the battery may drop below the minimum operating 

voltage of the receiver and other electronics.

    Also, it is not recommended that you fly to the soft LVC every time you 

fly.  Instead, you should be aware of the power level of the battery/

helicopter throughout the flight. If at any time the helicopter begins to 

require more throttle than typical to maintain hover or flight, you should 

land the helicopter immediately.  Routinely discharging the battery to the 

soft LVC can still cause permanent damage to the battery.

    Note:  When the battery power/voltage is getting low you will typically find 

that significant rudder trim and/or rudder stick adjustments are 

needed to prevent the helicopter from spinning.  This usually occurs 

before soft LVC, and indicates a good time to stop flying.

If you have any further questions or concerns regarding the handling, charging and/

or use of the included Li-Po battery pack, please contact Horizon Support Team at 

877-504-0233, Horizon Hobby UK at +44 (0) 1279 641 097 or Horizon Technischer 

Service, Germany at +49 4121 46199 66.

Battery Charging

Celectra 1-Cell 3.7V Variable Rate DC Li-Po Charger Instructions 

Step 1:  Connect power supply to an appropriate power source.

Step 2:   Insert output plug from power supply into the power input slot of the 

Variable Rate Charger.

Step 3:   Select the appropriate charge current for your battery by pushing the + 

or - which are the smaller buttons to the right and left of the middle button. 

(When charging your 250mAh battery, set the charger to 0.7 amps)

Step 4:   Properly connect battery to the Charger lead. Match the red dots on both 

the battery and charger connectors.  (Please see image below)

Step 5:   Press the start button on the Variable rate charger (the largest button in the 

middle).

LED functions under normal operation:

   • SINGLE SOLID LED – Shows Charge Current

   • SINGLE LED FLASHING – Charging

   • MULTIPLE LEDs FLASHING – Charge Almost Complete

   • LEDs SWEEPING SIDE TO SIDE – Charge Complete

    

Note:

  We do not recommend charging your single-cell Li-Po battery over 3C 

charge rate.  For example:  

DO NOT CHARGE 110mAh battery packs 

over .3 amps.

Summary of Contents for Blade MCX Tandem Rescue

Page 1: ... Spektrum trademark is used with permission of Bachmann Industries Inc Spektrum radios and accessories are exclusively available from Horizon Hobby Inc E fliteRC com 16703 Printed 10 09 Specifications Length 15 5 in 394mm Height 6 0 in 152mm Main Rotor Diameter 7 5 in 190mm Weight with Battery 2 1 oz 60 g Main Motor Coreless 4 installed Battery 250mAh 1 Cell 3 7V Battery Li Po 1 included Charger C...

Page 2: ...Especially keep your hands away from the rotor blades Note on Lithium Polymer Batteries Lithium Polymer batteries are significantly more volatile than alkaline or Ni Cd Ni MH batteries used in RC applications All manufacturer s instructions and warnings must be followed closely Mishandling of Li Po batteries can result in fire Always follow the manufacturer s instructions when disposing of Lithium...

Page 3: ...e injury or damage can occur Never operate the model out into the street or populated areas for any reason Carefully follow the directions and warnings for this and any optional support equipment chargers rechargeable battery packs etc that you use Keep all chemicals small parts and anything electrical out of the reach of children Moisture causes damage to electronics Avoid water exposure to all e...

Page 4: ...es are significantly more volatile than the alkaline Ni Cd or Ni MH batteries used in RC applications All instructions and warnings must be followed exactly Mishandling of Li Po batteries can result in fire By handling charging or using the included Li Po battery you assume all risks associated with lithium batteries If you do not agree with these conditions return your complete Celectra 1 Cell 3 ...

Page 5: ...ing the battery to the soft LVC can still cause permanent damage to the battery Note When the battery power voltage is getting low you will typically find that significant rudder trim and or rudder stick adjustments are needed to prevent the helicopter from spinning This usually occurs before soft LVC and indicates a good time to stop flying If you have any further questions or concerns regarding ...

Page 6: ... Celectra 1 Cell 3 7V Variable Rate DC Li Po Charger Lithium Polymer Li Po batteries are significantly more volatile than other rechargeable batteries used in RC applications Failure to read and follow these instructions and safety precautions may result in fire personal injury and damage to property E flite Horizon Hobby Inc its retailers and any other representatives assume absolutely no liabili...

Page 7: ... 1 cell Lithium Polymer batteries ONLY It MUST NOT be used to charge other sized Li Po batteries Ni MH or Ni Cd battery packs Never attempt to dismantle the charger Always disconnect the charger from the power supply after charging the battery Disposal of Li Po batteries requires special care Follow the manufacturer s instructions for safe disposal Installing the Transmitter Batteries Install four...

Page 8: ...rizontal surface as soon as you can within two seconds for gyro calibration Do not move sway the helicopter during the calibration process Failure to do this will cause unstable flight performance Transmitter Control Identification Note Before each flight you should ALWAYS turn the transmitter on before connecting the flight battery to the 5 in 1 unit After each flight be sure to always disconnect...

Page 9: ...n the raised side of the battery end cap is on the raised side of the battery mount usually toward the RIGHT side of the helicopter like the photo below Mode 2 Mode 1 Position the helicopter to view it from the left hand side Move the throttle stick on the transmitter forward and aft to check elevator pitch control When the throttle is pushed forward the 5 in 1 control unit alters the speeds of th...

Page 10: ...her Service Germany at 49 4121 46199 66 If you ve confirmed proper control operation of your Blade mCX Tandem Rescue continue reading the manual prior to attempting to fly the helicopter Note Attempting to fly the helicopter without completely reading the manual may cause injury to yourself and people in the vicinity as well as damaging the helicopter 5 in 1 Control Unit Description Arming and Mot...

Page 11: ...cator on the transmitter is glowing solid red If the transmitter is powered on and functioning properly disconnect the flight battery from the 5 in 1 unit then reconnect it Now the 5 in 1 unit should initialize and arm properly If your 5 in 1 unit will not initialize and arm after following the guidelines as listed above call the Horizon Support Team at 1 877 504 0233 Horizon Hobby UK at 44 0 1279...

Page 12: ... 1 Mode 2 Descend After lifting the model off the ground you can balance the throttle by carefully moving the throttle stick up and down so the model will hold a stationary hover without climbing or descending Moving the left hand stick to the left will turn yaw the nose of the helicopter to the left about the vertical axis of the helicopter Mode 1 Mode 2 Nose Yaw Left Moving the left hand stick t...

Page 13: ...to the left allowing the helicopter to be flown sideways toward the left when viewing the helicopter from behind Mode 1 Mode 2 Helicopter Slides Left Moving the aileron stick to the right will roll the helicopter to the right allowing the helicopter to be flown sideways toward the right Mode 1 Mode 2 Helicopter Slides Right Note This command does not cause the nose of the helicopter to turn Rather...

Page 14: ... manual may cause injury to yourself and people in the vicinity as well as damaging the helicopter Having followed the proper 5 in 1 control unit initialization and arming procedures confirmed proper control of the servo and motors and found a suitable flying area your Blade mCX Tandem Rescue is ready for flight Note In addition to reviewing the flight maneuvers outlined below we recommend that yo...

Page 15: ...QUICKLY AS POSSIBLE TO PREVENT DAMAGE TO THE ESC S OF THE 5 IN 1 UNIT YOU MUST ALSO BE SURE THAT THE THROTTLE TRIM IS SET TO THE MIDDLE POSITION OR TO A POSITION THAT IS LOWER THAN THE MIDDLE Failure to lower the throttle stick to the lowest possible position in the event of a crash could result in damage to the ESCs in the 5 in 1 unit which may require replacement of the 5 in 1 unit Note Crash da...

Page 16: ... Set Tandem EFLH2504 Replacement LED Set 4 Tandem EFLH2509 Motor with Pinion Clockwise Tandem EFLH2510 Motor with Pinion Counterclockwise Tandem EFLH2516 Swashplate 1 Tandem EFLH2518 Pushrod Set Tandem EFLH2522 Body Canopy Tandem EFLH2522F Landing Gear Front Tandem EFLH2522R Landing Gear Rear Tandem EFLH2524F Main Frame Front Tandem EFLH2524R Main Frame Rear Tandem EFLH3021 Canopy Mounting Grommet...

Page 17: ...inkage Set EFLH2502 29 Internal Control Linkage Set EFLH2502 30 Pushrod Set EFLH2518 31 Control Arm Set EFLH2503 32 Replacement Servo MechanicsEFLH1066 33 Replacement Servo MechanicsEFLH1066 No Description Item 34 5 in 1 Control Unit Receiver Servo ESCs Mixer Gyro EFLH2501 35 Screw M0 8x2 5 EFLH2501 36 Internal Control Linkage Set EFLH2502 37 Body Canopy EFLH2522 38 250mAh 1 Cell 3 7V Li Po EFLB25...

Page 18: ...tter Transmitter was too close to Heli during the initialization process Unplug then reconnect flight battery Rebind the heli to your desired compatible transmitter Page 29 Move transmitter powered on a few feet from the Heli prior to reconnecting the flight battery Problem Possible Cause Solution Heli appears to drift toward a certain direction User did not re trim the heli Read Understanding the...

Page 19: ...sociated with the use of this Product you are advised to return this Product immediately in new and unused condition to the place of purchase Law These Terms are governed by Illinois law without regard to conflict of law principals Safety Precautions This is a sophisticated hobby Product and not a toy It must be operated with caution and common sense and requires some basic mechanical ability Fail...

Page 20: ...horizonhobby com with any questions or concerns regarding this product or warranty European Union Electronics and engines requiring inspection or repair should be shipped to the following address Horizon Hobby UK Units 1 4 Ployters Rd Staple Tye Harlow Essex CM18 7NS United Kingdom Please call 44 0 1279 641 097 or e mail us at sales horizonhobby co uk with any questions or concerns regarding this ...

Page 21: ...ere you can drop off your waste equipment for recycling please contact your local city office your household waste disposal service or where you purchased the product Declaration of Conformity in accordance with ISO IEC 17050 1 No HH2009101901 Product s EFL Blade Tandem Rescue RTF Item Number s EFLH2500 Equipment class 1 The object of declaration described above is in conformity with the requireme...

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