FUTABA 8UHPS Instruction Manual
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FUTABA 8UHPS Instruction Manual

FUTABA 8UHPS Instruction Manual

8 channel radio control system
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Summary of Contents for FUTABA 8UHPS

  • Page 2 Regulations. An application for export approval must be submitted. 3. Modification, adjustment, and replacement of parts Futaba is not responsible for unauthorized modification, adjustment, and replacement of parts of this product. This device complies with part 15 of the FCC rules. Operation is subject to the...
  • Page 3 Futaba Corporation of America's payments to RBRC makes it easy for you to return the spent battery to Futaba for recycling purposes. You may also contact your local recycling center for information on where to return the spent battery. Please call 1- 800-8-BATTERY for information on Ni-Cd battery recycling in your area.
  • Page 4 To ensure the safety of yourself and others, please observe the following precautions: Ni-cd Battery Charge the Batteries! Don't forget to recharge the batteries before each flying session. Plug in the charger that comes in this system and hook up the transmitter and airborne batteries the day before a planned flying session.
  • Page 5 movement of the sticks. If a servo operates abnormally, don’t attempt to fly until you determine the cause of the problem. Finally, before starting the engine, be sure to check that the transmitter model memory is correct for the chosen model, and (for PCM receivers only) that the fail safe system functions properly when the transmitter is shut off.
  • Page 7 Safety Precautions (DO NOT operate without reading).............. 1 Introduction to the 8UH System....................6 Contents & Technical Specifications................... 7 Optional Accessories ........................7 Transmitter Controls and Switch Identification................8 Transmitter Switch Assignments ....................9 Charging the Ni-Cd Battery....................... 10 Adjusting Length of Non-slip Control Sticks................10 Stick Spring Tension Adjustment....................
  • Page 8 PMIX-1-2 ..Programmable Mixing................51-52 HOV-TH..Hovering Throttle .................... 53 HOV-PI ... Hovering Pitch....................53 GYRO....Gyro Mixing....................54 GOVrpm ..Governor Mixing..................... 54 TH-NDL ..Throttle Needle Mixing (Normal, Idle-up 1 & 2)..........56 INVERT CROSS..Inverted Cross Position ................57 REVOLU..
  • Page 9 The versatile FP-T8UHFS/T8UHPS PCM1024 multi-function 8-channel transmitter may be used with any Futaba PCM1024 receiver! In addition, your system will work with Futaba FM/PPM receivers when you select the FM transmission option. The large liquid-crystal display panel allows rapid data input into its easy-to-read LCD display. To allow efficient programming, all of the transmitter’s functions have been separated into Basic Menu and...
  • Page 10 Specifications and ratings are subject to change without notice. • 8UH Transmitter, including RF module • R148DP/DF Receiver, R138DP/DF, or R149DP Receiver • Servos, five S3001 , five S9202, four S3001, or four S9001, with mounting hardware and servo arm assortment •...
  • Page 11 Dust cap (optional memory module plugs in here) Antenna Be careful not to bend your antenna when you collapse or extend it. CH8 knob Antenna must be fully extended when flying. Hovering Pitch knob Carrying handle Switch B Rudder dual rate switch Hovering Throttle knob Switch C Switch A...
  • Page 12 RF module To remove, press the tabs together and gently pull rearwards. To install, line up the connector pins with the socket in the rear of the module and gently snap into position. Trainer function /DSC function connector Ni-Cd battery pack Charging jack Battery connector location Battery cover...
  • Page 13 1. Connect the transmitter charging jack and airborne Ni-Cd batteries to the transmitter and receiver connectors of the charger. 2. Plug the charger into a wall socket. 3. Check that the charger LED lights. The batteries should be left on charge for about 15 hours when recharging the standard NR-4RB and NT8S600B Ni-Cd batteries.
  • Page 14 You’ll see the effect of you changes when you next turn on your transmitter. In some cases, you’ll have to swap the throttle detent mechanism with the elevator centering mechanism. This can be done by Futaba.
  • Page 15 If your aileron servo (or others) are too far to plug into the receiver, use an aileron extension cord to extend the length of the servo lead. Additional extension cords of varying lengths are available from your hobby dealer or Futaba.
  • Page 16 While you are installing the battery, receiver, and servos into your model’s fuselage, please pay attention to the following guidelines: Use the supplied rubber grommets when 2.3-2.6mm nut you mount each servo. Be sure not to overtighten Flat washer the screws. If any portion of the servo case directly Rubber grommet contacts the fuselage or the servo rails, the rubber Brass eyelet...
  • Page 17 The following frequencies and channel numbers may be used for flying aircraft in the United States: 72 MHz band 50 MHz Band (Amateur license required) Installing your frequency number indicator: It’s very important that you display your transmitting channel number at all times. To install your indicator, peel off the channel number’s backing sheet, and carefully stick the numbers to both sides of the number...
  • Page 18 When you first turn on your transmitter, a confirmation beep sounds, and the screen shown below appears. Before flying, or even starting the engine, BE SURE that the model name appearing on the display matches the model that you are about to fly! If you don’t, servos may be reversed, and travels and trims will be wrong, leading to an immediate crash.
  • Page 19 Warning sound: Beep beep beep beep all programming has been erased and is not available. (repeated) Return your transmitter to Futaba for service. The MODEL SELECTION warning is displayed when the transmitter attempts to load a model memory from a memory module that is not currently plugged into the transmitter.

  • Page 20: Data Input

    This warning appears when an [optional] CAMPac memory module is used in the transmitter for the first time. When the Plus (+) key is pressed, DATA INPUT initialization of the module begins, after which the memory module can be used. Once the module is initialized, the display will not appear again.
  • Page 22 Pages 20 to 45 describe the Basic Menu functions for helicopters. Please note that most of these Basic Menu functions are the same for aircraft (ACRO setup), sailplanes (GLID1FLP/2FLP setups), and helicopter (HELISWH1/SWH2/SWH4/SR-3/SN-3) setups. Starred items are for helicopters only. Map of Basic Helicopter Functions ......
  • Page 23 Parameter Submenu Engine start Data reset ATL setting Modulation type Model type Reverse Failsafe settings HELI Basic Menu Exponential Dual Rates The function are switched with the ATV function Edit keys shown in the figure. Revolution Normal Pitch Curve Normal Mode keys Cursor keys Throttle Curve...
  • Page 24 Gyro Mixing Hovering Pitch Hovering Throttle Programmable Mixer #2 Programmable Mixer #1 Delay Offset iv Offset 2 Offset 1 Throttle Hold Throttle Curve Idle-up 2 Throttle Curve Idle-up 1 Throttle Curve Normal (Advanced Menu initial screen) Pitch Curve Normal Pitch Curve Idle-up 1 Pitch Curve Idle-up 2...

  • Page 25: Helicopter Setup

    ELICOPTER ETUP NSTRUCTIONS The following example shows how the T8U may be programmed for a contest helicopter model. The settings presented here are for a typical model. Your model’s settings are likely to vary from these, but the procedures given will still be applicable. 1.

  • Page 26: Flight Condition Switching

    • Throttle Hold [HOLD] – for autorotation. ON at Switch E forward position. Move the hovering pitch knob (CH6) and the We recommend that you fly the model and hovering throttle knob (CH7) to the center adjust trims and control responses to your liking in positions (if these functions are activated in the hover before setting up another flight condition.
  • Page 27 14. Throttle Curve Setting: move to the TH- Point CRV IDL2 menu and activate with the (+) key. Setting (%) Input the trial throttle curve points as shown Blade pitch -4° +4.5° +12° below: Point 19. Rudder→Throttle Mix Setting Setting (%) Rudder→Throttle mixing is useful for hovering eight, nose-in circle, Top Hat, Pirouette, 15.
  • Page 28 flight conditions. You can set different delays You may use the Hovering Pitch and for aileron, elevator, and rudder. The delays you Hovering Throttle functions for fine trimming set apply to all flight conditions. We recommend changes due to humidity, etc. trying very small values for the initial settings, say This concludes the example setup procedure 5 - 10%.
  • Page 29 The throttle curve normal function is used to input the normal (NORM) throttle curve, which is usually not a linear response to throttle stick motion. The normal throttle curve is the basic throttle curve intended for flight around hover. Together with the pitch curve (normal), the throttle curve is adjusted for best climb at a fixed engine RPM.
  • Page 30 The Normal pitch curve function contained in the Basic Menu sets the normal (NORM) curve. The Normal pitch curve is the basic pitch curve for flight near hover. Together with the normal throttle curve, the normal pitch curve is adjusted for best vertical performance at a constant engine speed.
  • Page 31 The Normal revolution function mixes pitch commands into rudder in order to suppress the torque generated by changes in the main rotor’s pitch angle. Three are three different settings of revolution mixing available: normal (NORM), idle-up 1 (IDL1), and idle-up 2 (IDL2).
  • Page 32 The ATV function is used to set the travel of each servo in both directions. At a 100% setting, the throw of the servo is approximately 40° for channels 1 – 4 and approximately 55° for channels 5 – 8. Reducing the percentage settings reduces the total servo throw in that direction.
  • Page 33 Setting Dual Rate Values and Switches Channel display: AI = Aileron, Indicates top or bottom These keys are used to move To EXP EL = Elevator, RU = Rudder switch position (top shown) through items 1-6 in this menu. function 1.
  • Page 34 Exponential settings may be used to change the response curve of the servos to make flying more pleasant. You can make the servo movement less or more sensitive around neutral for aileron, elevator, throttle, and rudder. It can also be set for each side of the dual rate switches.
  • Page 35 The Fail Safe function is used to prescribe what the PCM receiver will do in the event radio interference is received. In this menu, you may select from one of two options of operation for each channel. The "NORM" (normal) setting holds the servo in its last commanded position, while the "F/S"...
  • Page 36 The servo reverse function may be used when you need to change the direction that a servo responds to a control stick motion. When you use this function, BE SURE THAT YOUR CONTROL IS MOVING THE CORRECT DIRECTION. If you are using Advance Menu functions, set correct travels in the REVERS menu first, before setting up the Advance Menu.

  • Page 37: Resetting The Memory

    The Date Reset function is used to clear out an existing set of model data. This may be used to input new model settings into a memory used for another model. It resets all data to initial values. Resetting the memory These keys are used to To INVERT or SWASH MODEL DATA RESET...
  • Page 38 This function is used to select the type of model to be programmed in the current model memory. You may select from helicopters of five swash types (HELISWH1/SWH2/SWH4/SR-3/SN-3), aircraft (ACRO), and gliders with one or two flap servos (GLID1FLP, GLID2FLP). Swashplate Type Setting Procedure HELISWH1 Type This type’s helicopter has independent aileron and elevator servos linked to the...
  • Page 39 HELI SN-3 Type Use SN-3 Mixing if the servo inputs match the Elevator figure. Front With Aileron inputs, the three servos tilt the swashplate left and right; Aileron With Elevator inputs, the elevator and pitch servos tilt the swashplate fore and aft; With Pitch inputs, all three servos raise the Pitch swashplate up and down.
  • Page 40 You can use Swash AFR rate settings to reduce (or increase) the function rate when SWH2, SWH4, SR-3, or SN-3 is selected as the swash type. The function rate reduction or increase for the aileron, elevator, and pitch may be controlled by this menu.
  • Page 41 The Invert function is used to make inverted flight easier. Instead of having to learn to reverse controls mentally, when switch H is moved forward (and the INVERT function is activated), the direction of operation of the elevator, rudder, and pitch servos is reversed.
  • Page 42 The 8UH has digital trims which are different from conventional mechanical trim sliders. Each trim control is actually a two-direction switch. Each time the trim switch is pressed, the trim is changed a selected amount. When you hold the trim lever, the trim speed increases.
  • Page 43 The DISP function swaps the black and white displays in the graphic trim position display shown on the screen. We suggest you try both settings and see which one is better for you. (The reverse display is not affected by the Data Reset command.) Setting you trim displays These keys are used to move through submenus in the TRIM function.
  • Page 44 The Trainer function is used to train novice pilots using an optional trainer cord connecting two transmitters. The instructor may choose that all channels be controlled by the student, or that certain designated channels be operated by the student and the remainder by the instructor. Pulling on Switch F allows the student to control the selected channels on the model.
  • Page 45 The TH-CUT function is used to kill the engine at the end of a flight. The engine can be stopped with one touch with switch F (the momentary trainer switch is the initial setting, but you may select another). This function eliminates the need to move the trim to kill the engine and then move back to the idling position after each flight.
  • Page 46 The Model function includes a number of submenus that are used to manage the model memory. This may be better understood by viewing the menu structure on p. These keys are used to move through submenus in the MODEL function. To TIMER function Call the function in the MODEL submenu with the...
  • Page 47 Copying from one model memory to another These keys are used to move through submenus in the MODEL function. To TIMER function MODEL DATA COPY Select the destination model number with the (+) and (-) keys. When you have the right number, press the (+) and (-) keys simultaneously.
  • Page 48 The Timer Menu controls an electronic clock that may be used to keep track of time remaining in a competition task window, flying time on a full tank of fuel, amount of time on a battery, etc. The timer’s settings may be set independently for each model, and is automatically updated each time the model is changed.
  • Page 49 Pages 46 to 60 describe the Advance menu functions for both helicopter model types (HELISWH1, HELISWH2, HELISWH4, HELISR-3, HELISN-3). Helicopter Basic Menus are in pages 26 to 45. TH-CRV ....Throttle Curve..........47 TH-HLD ....Throttle Hold ..........49 OFST-1-2-iv ..Offset 1-2-iv...........50 DELAY....Delay..............50 PMIX-1-2....Programmable Mixing ........51-52 HOV-TH ....Hovering Throttle ..........53 HOV-PI....Hovering Pitch ..........53 GYRO ....Gyro Mixing ..........54...
  • Page 50 You can use Throttle Curve menus to program a five-point curve so that the engine speed responds the way you like relative to movement of the throttle stick. You can set each of the five points over a 0% to 100% range. There are three throttle curves: normal (NORM), idle-up 1 (IDL1), and idle-up 2 (IDL2).
  • Page 51 Inputting the Throttle Curve in Normal, Idle-up 1, and Idle-up 2 The Throttle Curve Normal function is on at startup. The blinking item on the Top arrow indicates the current stick These keys are used setting screen is the position (2 arrows means it's between to move through the current setting item.
  • Page 52 The Throttle Hold function holds the engine throttle in the idling position and disengages it from the throttle stick, whenever switch E is activated. It is commonly used during autorotation. You can set the throttle position to be held over a -50 to +50% range centered about the throttle idle position.
  • Page 53 The Offset 1 , Offset 2, and Offset iv functions are used to offset (change the neutral position) of the aileron, elevator, and rudder when switch G is used to switch to idle-up 1 (or 2) or switch F is used to switch to inverted flight. This function may be used to automatically change the trim of a helicopter flying at high speed.

  • Page 54: Setting Delays

    Setting Delays The Delay function is automatically activated when either These keys are used to move To PMIX-1 Offset, Revolution mixing, or Throttle hold are activated. through the three submenus in function 1. Aileron delay the DELAY function. Input the desired Aileron delay with the (+)/(-) keys.
  • Page 55 (Continued from preceding page) These keys are used to move To PMIX-2 around in the PMIX-1 menu function 5. Link function setting Turn the Link function ON or OFF with the (+)/(-) keys. When the Link function is ON, ">" is displayed after the slave channel on the screen.
  • Page 56 The Hovering Throttle function may be used to trim the throttle near hover without affecting pitch. Its position can be memorized so that when the model memory is recalled, the original trim is repeated by rotating the knob to its center position. When the hovering throttle knob is turned clockwise, the engine speed rises and when turned counterclockwise, the engine speed drops.
  • Page 57 The gyro mixing function is used to adjust the gyro sensitivity from the transmitter. Use this function by connecting the gyro sensitivity adjustment input connector to the channel 5 output of the receiver. Switch H or switch G (idle-up switch) can be selected, and each direction of the changeover switch can be adjusted.
  • Page 58 Caution: The relationship of the governor speed setting rS1~rS3 and the switch positions conforms to the table above. Since the governor mixing function may not be used or the direction may be different, if this mixing was turned ON, first check the direction. At throttle hold, always check that the governor is OFF.
  • Page 59 → → The Throttle→Needle mixing function is used to control the engine’s mixture using a 5- point curve relative to throttle stick movement . The engine must be equipped with a mixture control system, such as needle control or some other mixture adjustment, and the needle servo must be plugged into CH8.
  • Page 60 The inverted cross position function sets the point at which low-side pitch is crossed when switching between forward and inverted. It is commonly set to a value of 30%. Entering Inverted Cross Position These keys are used to move 1. Activate Invert Cross Function through the two submenus in REVOLU Press the (+) key to activate the INVERT CRSS function...
  • Page 61 Revolution IDL1 Curve Example Revolution IDL2 Curve Example +100% +100% +50% +50% -10% -10% -17% -17% -25% -25% -50% -50% -100% -100% Curve Point Curve Point LOW ← throttle stick → HI LOW ← throttle stick → HI Inputting Revolution Five-Point Curves The Revolution Normal function is on at startup.
  • Page 62 The pitch curve is defined by a 5-point curve so that you may set the best pitch motion relative to throttle stick movement. Each point on the curve can be adjusted over a 0% to 100% range. The T8U system contains five pitch curves: normal (NORM), idle-up 1 (IDL1), idle-up 2 (IDL2), hold (HOLD), and inverted (INVR).

  • Page 63: Setting Method

    SETTING METHOD The Pitch Curve Normal function is on at startup. The blinking item on the Top arrow indicates the current throttle These keys are used setting screen is the stick position (2 arrows means it's to move between current setting item. between points) Curve points 1-5 To TH-CRV...
  • Page 64 The following section (pages 62 – 68) describes how to use the airplane-specific Basic and Advance Menu functions (model type ACRO). The functions of the other Basic Menu items are contained in the Helicopter (HELI) section, pages 19 – 60. The airplane Advanced Function section begins on page 69.
  • Page 65 Aileron Differential Flap Trim Flaperon Programmable Mixer #7 Programmable Mixer #6 Parameter menu Programmable Mixer #5 Reverse Programmable Mixer #4 Failsafe settings Programmable Mixer #3 Idle-Down Programmable Mixer #2 Exponential Programmable Dual Rate Mixer #1 (Special Mix menu initial screen) Throttle-Needle ATV function (Basic Menu initial screen)
  • Page 66 AIRCRAFT SETUP INSTRUCTIONS (GENERAL 120 CLASS STUNT PLANE) The aircraft setup procedure presented below receiver. If you make a change, it won’t take uses a F3A-class model as an example. You may effect until you cycle the power off and on again. use a similar procedure to set up your own model, but your setting’s numbers and percentages will probably be different.
  • Page 67 Rudder setting: adjust the rudder travel to roughly 9. Snap Roll (SNP, p. 77, Advance Menu) 45 degrees in the left and right directions with Activate the Snap Roll function by pressing the the ATV function. plus (+) key. Set the deflection rate for each switch position. 7.
  • Page 68 The following chart may be used to systematically set up and trim a model for straight flight and aerobatic maneuvers. Please note that for best results, trimming should be done in near- calm conditions. Before you decide to make a change, be sure to try the test several times before making adjustments.
  • Page 69 To test for _ Test Procedure Observations Adjustments 9. Aileron Method 1: fly model toward you A. No heading changes A. Differential differential & pull into a vertical climb B. Heading change opposite to roll settings OK before it reaches you. command (i.e.
  • Page 70 The Idle Down function lowers the engine idling speed when either the airbrake switch (SW C) or landing gear switch (SW G) is activated. This function may be used whenever you wish to raise the engine idling speed to prevent the engine from stalling, and to lower the engine idling speed for landing.
  • Page 71 The Throttle Cut function provides you an easy way to stop the engine by simply flipping a switch with the throttle stick at idle, which commands the throttle servo to move a prescribed amount. The amount of movement is largest at idle and disappears at high throttle. Both he switch’s location and activation direction may be chosen by the owner.
  • Page 72 AIRCRAFT (ACRO) ADVANCE MENU FUNCTIONS The next section of this manual, pages 69 to 78, describe how to use the functions in the ADVANCE MENU with the aircraft (ACRO) model mode. Some of these functions are also used with glider model modes (GLID1FLP, GLID2FLP). PMIX-1-7..
  • Page 73 Your 8UH system contains seven separate programmable mixers with unique mixing capabilities. You may use mixing to correct bad tendencies of the aircraft during aerobatics, and to make operation more pleasant. Besides mixing between arbitrary channels, the mixers may be linked with the Advance menus in the 8UH. They can also be set to provide fixed offsets.
  • Page 74 (Continued from preceding page) (Mixer# 6-7 only) 4. Input 5-point curve values Select the curve position “POS1” with the Initial value (0%) CURSOR keys and set the rate with 5-point curve the (+)/(-) keys. +100% -If you’re unhappy with what you’ve set, you may return to the default Set rate value by presing the (+) and (-) keys...
  • Page 75 The Flaperon mixing function uses two servos to individually control two ailerons, combining the aileron function with the flap function. For a flap effect, the ailerons can be raised and lowered simultaneously. Of course, aileron function, where the two controls move in different directions, is also performed.
  • Page 76 The Flap Trim function is used to specify the amount of flap travel (or camber, if on a sailplane setup). If flaperon (FLPRON) mixing is active, FLAPTRM is automatically turned on. You should match the travel of both flaps before using this function to set the total amount of flap throw.
  • Page 77 The ABRAKE function simultaneously drops the flaps and moves the elevator, and may be used to make steep descents or limit airspeed in dives. Airbrakes can be activated in a proportional manner (LIN, for linear) by moving the throttle stick, or you may choose to move all the controls to the defined positions by flipping switch C.
  • Page 78 → Elevator-to-flap mixing makes the flaps drop or rise whenever the elevator stick is moved. It is most commonly used to make tighter “pylon” turns or squarer corners in maneuvers. In most cases, the flaps droop (are lowered) when up elevator is commanded.

  • Page 79: Aileron Operation

    The Elevon function should be used with delta wings, flying wings, and other tailless aircraft whose layouts combine the aileron and elevator functions, and requires one servo for each elevon. The aileron and elevator response of each servo can be adjusted independently.
  • Page 80 Setting up dual elevator servos 1. Turn the ALVATR function ON by pressing the (+) To SNP These keys are used to move key ("ON" displayed). Turn off (INH) the function with function through the five submenus in the (-) key. the ALVATR function.
  • Page 81 The Throttle Delay function is used to delay the response of the throttle servo to simulate the slow response of a turbojet engine to throttle control. A 40% delay setting corresponds to about a one second delay, while a 100% delay takes about eight seconds to respond.
  • Page 82 The pages in the glider section describe the additional special mixing functions that only are available when the two glider (GLID1FLP, GLID2FLP) model types are selected. The GLID1FLP menu is intended for sailplanes with one or two aileron servos, and a single flap servo (or two connected with a y-connector), while the -2FLP configuration is for dual flap servos that can act oppositely as ailerons.
  • Page 83 The Advanced Menus for the GLID1FLP and GLID2FLP are shown below. The Basic Menu for both of these model types is similar to that shown for helicopter (HELI) on p. 20, with the helicopter functions removed. Aileron Differential Aileron Differential Flap Trim Flap Trim Programmable Mixer #7...
  • Page 84 GLID-2FLP SETUP INSTRUCTIONS (TWO AILERON & TWO FLAP SERVOS) Before you begin, be sure that all of your aileron and flap servos are plugged into the proper receiver channels. This example assumes that you are using model memory #3. CH1 — Right aileron CH2 —...
  • Page 85 (this may be changed later for more travel). For cruising, you'll want no droop at all, but for slow- speed thermalling, you may want to droop the trailing edge a bit. Use the flap trim setting to get REAR VIEW OF MODEL WITH LEFT AILERON COMMAND Reverse any of CH1, 5, 6, and 7 by moving to the the desired amount of camber.
  • Page 86 CH 1 (right) aileron: Right aileron down travel Right aileron up travel CH 7 (left) aileron: Hit the (>) CURSOR key once and input the throw for the flaps. Move the throttle stick and be sure the flaps DROP with butterfly. If they don’t, change the sign (this again may depend on servo orientation).
  • Page 87 ON or OFF coupling. When everything is set properly, the indicates Start-Speed fuselage will be tangent to the thermal turn circle. switch position. Switch G 14. You may also set up the speed mode presets (SPEED, p. 90) for high-speed cruise between thermals.

  • Page 88: Sailplane Trimming Chart

    SAILPLANE TRIMMING CHART ©1995 by Don Edberg (all rights reserved) To test for _ Test Procedure Observations Adjustments 1. Model Control Fly the model straight Adjust the transmitter trims for Change electronic subtrims and/or Neutrals and level hands-off straight & level flight, no adjust clevises to center transmitter camber control.
  • Page 89 BFLY — Butterfly Mixing (“Crow”) The Butterfly mixing function – sometimes called “crow” – is used for glide path control for landing or for limiting speed when in a dive. Butterfly mixing is controlled with the throttle stick and raises the ailerons and lowers the flaps (two aileron servos are required, using CH1 and CH7, and the same setting applies to both, so horns must be identical).
  • Page 90 → → Flap→aileron mixing is used to change the camber (the angle of the ailerons and flaps) over the entire wing, which produces less drag than just dropping the flaps by themselves. When you have Elevator→Flap mixing activated along with Flap→Aileron mixing, the entire trailing edge droops or reflexes with Flap→aileron mixing elevator stick motion.
  • Page 91 → → Aileron-to-flap mixing is used to improve the roll rate and to reduce the wing’s induced drag during rolls and banking maneuvers by operating the flaps differentially as ailerons. The function REAR VIEW OF MODEL WITH LEFT AILERON COMMAND may be turned on and off by switch "G", Aileron→flap mixing or it may be always on.
  • Page 92 The Start function is used to offset the aileron, elevator, and flap servos to the position that provides maximum lift during launch. Normally the ailerons and flaps are drooped about 20-30°, with the flaps drooped slightly more to prevent tip-stalling on tow. The elevator neutral START (launch) presets can also be offset in order to trim out any pitch changes caused by the flap and...
  • Page 93 The Speed function is used to offset the aileron, elevator, and flap servos to the position that provides maximum drag for cruise and high-speed flight. Normally the ailerons and flaps are raised about 3- 5°. Some airfoils, notably the RG-15, Speed presets actually have higher drag with reflex, so Speed function should not be used with...
  • Page 94 The setting data for 8 models can be saved in the T8UHPS transmitter itself and the setting data for 8 more models can be saved in the DP-16K CAMPac (Option) removable memory module. CAMPac initialization To use the CAMPac with the T8UHPS, the CAMPac must be initialized when the power is turned on for the first time.
  • Page 95 The abbreviations used with the 8UH are defined below alphabetically. Related pages are given in parenthesis following the definition (). → → → → → → -92-...
  • Page 96 → → -93-...
  • Page 101 -When requesting warranty repair, please include the warranty card. Read the warranty card supplied with your system. If you have any questions regarding this product, please consult Futaba. The address and telephone numbers of our service center is given below. Telephone inquiries are accepted from 9:00 AM to 5:00 PM weekdays, except on holidays.

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