Futaba Attack 4 FP-4NBL Digital Proportional Radio Control Instruction Manual

Futaba Attack 4 FP-4NBL Digital Proportional Radio Control

Thank you!

Thank you for purchasing a Futaba digital proportional radio control set.
Please read this manual carefully before using your set.

FEATURES OF FP-4NBL

The FP-4NBL is a 4 channel AM proportional radio control set with an ergonomic case created as a result of the exhaustive pursuit of easier operation, newly designed sticks for smooth and positive operation, servo reversing switch for each channel, and other innovations based on the opinions and needs of many RC modelers.
Please read this manual before using your new set.

TRANSMITTER FP-T4NBL

• Servo reversing switch for each channel. Servos are reversed by using this switch.

• Newly designed sticks operate smoothly and positively.
  Spring tension mechanism allows adjustment of the operating feel of the stick lever.

• Nonslip adjustable lever head allows adjustment of the stick length as desired.

• Functional case, created as a result of the exhaustive pursuit of easier operation, has evolved a thick case which fits into the palm of the hand.

• Easy to read transmitter battery voltage/output level meter.

• Neck strap bracket provided as standard. Operation is easier if the transmitter is hung from your neck by using the neck strap.

• Nicad operation as standard.

RECEIVER FP-R114H

• High performance AM 4 channel receiver in which miniature size and light weight have been achieved by using the PC board space to the maximum.
• Narrow band ceramic filter improves rejection of adjacent channel interference.

RECEIVER WITH LINEAR CONTROLLER MCR-4A

• FET amplifier with miniature lightweight AM 4-channel receiver and motor controller in one pack.
• Since the drive motor power supply (7.2 V NiCd battery pack, etc.) can also be used to power the receiver and servos, troublesome wiring is unnecessary and the model can be made lighter.
• Built-in high performance low voltage “autocut” circuit prevents loss of control due to power supply voltage drop during flight.
• Since the motor speed can be controlled steplessly from maximum alow to high, acrobatics equal to those of engine aircraft can be reproduced even with a motor aircraft.

FEATURES OF MCR-4A RECEIVER

• Narrow band design using a narrow band ceramic filter.

FEATURES OF MCR-4A AMP

• Built-in heat protector prevents overheating of the amplifier by a continuous overcurrent.
• Motor idle or maximum slow can be arbitrarily set at the transmitter throttle stick maximum slow position by built-in idle point trimmer.

SERVO FP-S148 RUGGED, LOW-PROFILE SERVO

• Vibration and shock resistance have been improved further by using a direct wiring system which directly connects the servo amp, motor and potentiometer.
• The height of the servo has been reduced and high torque, high speed, and smooth movement equal to that of the coreless servo have been realized by using a new small, high performance motor. (Output torque 3kg.cm, operating speed 0.22 sec/60°).

SERVO FP-S133 HIGH-QUALITY MICROSERVO_

• Futaba hybrid custom 1C provides high starting output torque, narrow dead-band, and excellent trackability.
• Thick film gold plated connector pins insure positive contact connector shape increase reliability against shock and vibration. The connector housing has a reverse insertion prevention mechanism.
• Adjustable (splined) horn permits arbitrary setting of the neutral position.
• Despite being a microservo, operating speed is a fast 0.21 sec/ 60° and output torque is a high 2.2 kg/cm.

SET CONTENTS AND RATINGS

(Specifications are subject to change without prior notice.)

| FP-4NBL
---|---
For engine powered plane| For glider| For electric powered plane
Transmitter| FP-T4NBL x 1
Receiver| FP-R114H x 1| MCR-4A x 1
Servo| FP-S148 x 3| FP-S133x2
Charger| FBC-8B(4) x 1
Nicad Battery| NR-4QBx 1       | NR-4Kx 1|
Switch| SSW-J x 1| —
Accessories| Servo    tray                                ——
Extension cord. Neck strap. Frequency flag, Spare horn. Screws

TRANSMITTER FP-T4NBL

Operating system : 2 stick, all channels servo reverse
Transmitting frequency : 72 MHz bands
Modulation system : AM (amplitude modulation)
Power requirement : 9.6V 500 mAH Nicad Battery
Current drain : 150mA

RECEIVER FP-R114H

Receiving frequency : 72 MHz bands
Crystal replacement system: Frequency can be changed within the same frequency band by changing the pre-cision crystal.
Intermediate frequency 455 kHz
Power requirement 4.8 V Nicd Battery (shared with servo)
Current drain 18 mA (at 4.8 V)
Dimensions 1.3×1.87×0.78 in (33×47.4×19.8mm)
Weight 0.9 5 oz (27.5 g)
Receiving range 500m on the ground 1000m in the air with the FP-T4NBL (under best conditions)

SERVO FP-S148

Control system +putse width control 1520 us neutral
Operating angle One side 45° or more
Power requirement 4.8V-6V
Current drain 6.0V, 12mA (at idle)
Output torque 42 oz-in (3kg.cm)
Operating speed 0.22 sec/60°
Dimensions 1.59×0.77×1.4 in (40.4×19.8x36mm)
Weight 1.5oz (44.4 g)

RECEIVER WITH LINEAR CONTROLLER MCR-4A

Dimensions 1.5 oz (44.0 g) (excluding switches and connectors)
Weight 72 MHz bands
RECEIVER
Receiving frequency 455 kHz
Intermediate frequency 26mA
Current drain 500m on the ground 1000m in the air with the FP-T4NBL (under best conditions)
Receiving range : idle to maximum speed, no brake, idle point trimmer
AMP
Operating system : 6.0 to 8.4 V
Voltage : 100 A
Continuous maximum current : 450 A
Momentary maximum current
Resistance loss : 0.01 ohm

TRANSMITTER FP-T4NBL CONTROLS

Fig. 1 and Fig. 2 show the name of each part of the transmitter.
Memorize the position and operation of each switch and control.

MODE I
(2) Elevator and (3) Engine throttle are opposite those shown in the figure in Mode-l.

In the following descriptions, all the servo reversing switches are assumed to be in the normal position. When they are in the reverse position, operation is the opposite of that described.

1. Aileron Aileron operation

2. Elevator Elevator operation

3. Throttle Throttle operation

4. Rudder Rudder operation

5. Aileron trim lever Aileron trimmer

6. Elevator trim lever Elevator trimmer

7. Throttle trim lever Throttle trimmer

8. Rudder trim lever Rudder trimmer

9. Power switch ON in the up position

10. Level meter
    This meter indicates the transmitter battery voltage.
    When the antenna is extended fully and the power switch is set to ON, the pointer should deflect to the silver zone.

11. Neck strap bracket
    Bracket for neck strap. (Neck strap is sold separately.)

12. Antenna
    Strong telescoping antenna. Extend it to its full length when using the transmitter.

13. Handle
    Use this bar to carry the transmitter.

14. Nonslip adjustable lever head
    The length of the lever head can be adjusted to suit the operator.
    

15. Charging jack
    Use this jack for charging.

16. Transmitter crystal

17. Battery cover

Charging of transmitter and receiver Nicad batteries Recharge the receiver and transmitter Nicad batteries as shown in Fig. 4.

• Connect the charging plug of the dual charger to the transmitter charging jack. Connect the Rx-connector of the dual charger to the receiver Nicad battery plug, and AC-plug the dual charger to AC-outtet socket as shown in the figure.
• The receiver battery can be used about 10 times at 10 minutes per flight between rechargings.
• Charge the batteries for about 15 hours. When the set is not in use for some time, repeat discharge and charge two to three times before use. (If the batteries are not used for a long time, their capacity will go down).
• The dual charger transmitter and receiver Nicad batteries independently or simultaneously.

Notes

1. First connect the charger to the transmitter charge jack.
   The LED on the charger will glow RED.

2. Next connect to the receiver switch harness charge cord.
   The LED will change to GREENISH-RED (ORANGE).

3. In the case where only one battery pack is connected, the LED color will be:
   TXonly: GREEN
   RXonly: RED
   18 Servo reversing switches
   Using the servo reversing switches
   The left side of each switch is the normal position.
   The servo reversing switches reverse the direction of operation of the servos.
   
   

RECEIVER FP-R114H, SERVO FP-S1480R FP-S133 (IN CASE OF ENGINE POWERED

PLANE OR GLIDER)

RECEIVER WITH LINEAR CONTROLLER MCR-4A, SERVO FP-S133 (IN CASE OF

ELECTRIC POWERED PLANE)

The idle point trimmer sets the drive motor idling point.

• Set the transmitter throttle servo reversing switch to the normal position.

• Set the transmit throttle stick to the slowest position (stick all the way back ), turn on the MCR-4A power switch, press the start switch, and set the idle point trimmer to the point at which the motor idles.

• If the start switch is not pressed, the drive motor will not run.

• Turn the idle point trimmer slowly and without too much force.

• If the drive motor rotates in the reverse direction, change the connection of the lead wire from the MCR-4A at the motor terminals.

• Before pressing the MCR-4A start switch, check that the transmitter throttle stick is in the slowest position. Starting the drive motor suddenly is dangerous. This also applies when the idle point trimmer is changed. Be very careful.

• If an overcurrent flows continuously in the motor for some reason, the heat protector will operate and stop the motor.
  When the temperature drops after a short time, the motor can be controlled once more.
  Correct the cause of the continuous overcurrent before using the set.

• The heat protector does not protect the set against momentary overcurrent caused by shorting of the drive motor lead
  wires, etc.

• If the drive motor is stopped by the “autocut” function during flight, land the aircraft immediately and safely.

PRECAUTIONS

• Connect the receiver (or MCR-4A), servos, switches, and battery firmly as shown in Fig. 7 (Fig. 8). Then extend the transmitter and receiver antennas fully.

• Set the transmitter power switch to ON. Then set the receiver (or MCR-4A) power switch to ON. The servos stop near the neutral position. Operate the transmitter sticks and check that each servo follows the movement of the stick.

• Connect the pushrod to each servo horn, then check if the direction of travel of each servo matches the direction of operation of its transmitter stick. To reverse the direction of servo travel, switch the servo reversing switch.

• Operate each servo over its full travel, and check if the pushrod binds or is too loose. Applying unreasonable force to the servo horn will adversely affect the servo and quickly drain the battery. Always make the travel of each control mechanism somewhat larger than the full travel (including trim) of the servo horn. Adjust the servo horns so that they move smoothly even when the trim lever and stick are operated simultaneously in the same direction.

• Be alert for noise.
  This set is noise-resistant, but is not completely immune to noise. We recommend the use of noiseless parts and noise killer capacitor.

• When installing the switch harness, cut a rectangular hole somewhat larger than the full stroke of the switch and install the switch so that it moves smoothly from ON to OFF. This also applies to the switch mount when the switch is installed inside the fuselage and is turned on and off from the outside with a piece of wire, etc. Install the switch where it will not be exposed to engine oil, dust, etc.

• Even though the receiver antenna is long, do not cut or bundle it.

• Install the servos securely. Tighten the mounting screws until the rubber grommet is crushed slightly. If the screws are too tight, the cushioning effect will be adversely affected.
  

• Spare servo horns are supplied. Use them as needed.

• Wrap the receiver in sponge rubber. Waterproof and dustproof the receiver by placing it in a plastic bag and wrapping a rubber band around the open end of the bag. Do the same with the receiver/servo battery.

• Use the rubber bands wrapped around the receiver to hold the servo and switch leads.

• After mounting is complete, recheck each part, then check the range by making the transmitter antenna as short as possible, extending the receiver antenna fully, and operating the set from a distance of 20m to 30m. The movement of each servo should follow the movement of each stick of the transmitter.

• The motor controller connects to channel 3 in the MCR-4A.

• Motor aircraft vibrate less than engine aircraft, but the receiver and servo should be vibration proofed.
  

• After mounting and checking are complete, take your model to the shop where you purchased the set, or to an experienced radio control modeler, and ask them to teach you how to handle your radio control set in the proper manner and to inspect your set-up carefully.

• To enjoy radio control models fully, be sure to observe all safety standards.
  

SPLINED HORNS

This horn permits shifting of the servo neutral position at the servo horn. Setting and shifting the neutral position.

• a) Angle divisions

  1. The splined horn has 25 segments. The amount of change per segment is; 360-25=14.4°.
  2. The minimum adjustable angle is determined by the number of arms or number of the holes. For four arms, the minimum adjustable angle is:

• b) Effect

To shift the holes center line to the right (clockwise) relative to baseline A, shift arm 2 to the position of arm 1 and set it to the position closest to baseline A.
[Example] For a four arm horn, the angular shift per segment is 14.4″. The shift to the right is 90° -(14.4 x 6) = 3.6°.
To shift by the same angle in the opposite direction, use the opposite arm number.

For a six arm horn, turn the arm counterclockwise and set arm 2 to the position of arm 1. The adjustable angle is 60° – (14.4 x 4) =2.4°.
Arm 3 shift 4.8° to the right, arm 6 shifts 2.4° to the left, and arm 4 shifts 7.2° to the right and left.

PARTS LIST

Customer Support

FUTABA CORPORATION
Makuhari Techno Garden Bidg., B6F 1-3 Nakase, Mihama-ku, Chiba 261-01, Japan
Overseas Marketing & Sales Radio Control Systems
Phone: (043)296-5119 Facsimile: (043)296-5124
FUTABA CORPORATION OF AMERICA
4 Studebaker, Irvine California 92718, U.S.A.
Phone:714-455-9888
Telex: 23-0691227
Facsimile: 714-455-9899

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