scorpion manual
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BY FLYINGW INGS LTO
Flyingwings proudly introduce the all new Scorpion Tri-Copter.What is a Tri-Copter ? Unlike a helicopter that rises on a single column ofair, the tri-copter rises on 3 columns of air making it more stable. It uses 3standard brushless outrunner motors with standard slowfly propellers.The configuration is 3 arms spaced at 120 degrees separation andutilises the common 120 degs CCPM function found in most computerradio sets, normally used for helicopters with 3 link swash plate.Unlike the CCPM helicopter where servos are used to move the swashplate, we use speed controllers to control the speed of each motor.To keep the tri-copter stable we employ 4 Gyro units, 3 on cyclic, ie back,forward, left & right, plus one for rotational control (rudder).For control of rudder the rear motor is mounted on a fully ball raced pivotthat is controlled by the rudder stick, this allows pivoting and the gyrocontrols the natural tendency to rotate due to the torque of the motors.
The Scorpion Tri-Copter is not a toy and should be only used byadults with some RC experience
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Frame Set F10=~~f i L F14 J) ~~F3~= ~ ~ =)~F4_=_= _
) ~F5 ==0 U U 0F2 [JLJF60
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Himodel 1450kvmotor x 3
3x5mm caphead bolt x 6
Power set
Himodel18/20a ESC
Brushless ESC18/20a x 3
~ l~ ,..t ~_ 8x3.8SF prop x 3
Gy401 Gyro x 4 199 metal gearservo x 1
Avionics
Delay Limit
o{nl~l" .GYCOOff~Noros DR
3 1 ( Double sidedU tape
LET'S GET BUILDING
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FRAME ASSEMBL V
Plastic hexspacer 25mmFit Bearings
Slot the peg into the cut slot, if thisdoes not fit, sand the peg until itfits, you can use a non metallicweight to tap it down
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Fit Bearings
GLUE ALL JOINTS ANDTABS
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IMPORTANTLUE ALL JOINTS AND EDGES EXCEPT IN THE AREA OF THE SPACERS, WHERET IS NOT NECCESARY.SE THIN CYANO GLUE FOR THIS
TILTING TAIL UNITCONSTRUCTION,I
S ta in le ss s teel sha ftf - - - - J
D D Nyloc nutM icro ball race X 4Check that the bearings slide on to the shaft, if they do not, there maybe a small bur on thethreaded section. Lightly rub down with emery paper, until the bearing slides on. Do not overtighten the assemby.
EPP Undercarriage fixing
Red EPP skid1=
)1~60mm /
White EPPskid
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SERVO INSTALLATION
Both joints shouldbe allowed torotateyano gluen nuts
The neutral position of the tilting tail is not flatbut tilted to the right, this will compensate forthe torque reaction of the propellers. Set it sothat the top edge of the moving part is justbelow the bottom edge of the fixed part.Further trimming will be required, This willdiscussed later in the manual.
ReceiverPOWER SYSTEM AND ASSEMBL V
+Rotation
Himodel18/20a ESC
RED
BLACK-Battery
Make & test3 sets
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Motor A&B Motor C
[]
Tape to verticalpart (F6-8) withdouble sided tape
Mount motors to the frame.Note that the motor mount andscrews supplied with eachmotor are not used. Also notethat there is 2 sets of mountingholes in the bottom of eachmotor, only one set will matchthe frame holes.
5mmx3mm caphead screw
POWER DISTRIBUTION &GAIN BOARD
RED 75mm X4- use black cable+ use red cable
Cut the shown wires to size,trim ends and tin with solderTo ESC's
BLACK 75mm X 4BLACK 75mm X 1
To battery leadRED 75mm X 2RED 25mm X 2 (arming switch)
Smear solder thickly over~ the copper side of the pcbwhere shown
L...-_----J! . _ _ ! _...J
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Gain boardAllows up to 4 gyro gain leads to beconnected to one channel on thereceiver
Arming switch, create a loop of wireonto a male connector
--0To RX Gain Ch
Ga in l ea d f ro m gyro
To RX Batt Ch ---~: : : 0(I)coc :Q)-""'I
+
To flight Batt
To RX Batt Ch
To flight Batt
To ESC power +
Arming switch
Q)-""'ITo ESC power
~ Heat shrink
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SECTION S: CONTROL SET UP
GYRO SETUP
Signal wire to receiverThe reason we use gyro's to control the tri-copter is to provide constant correction to thetri-copter wanting to pitch and roll. This willbe due in main to wind.
r---l__J Gyro gain lead (single wire)to power board
100%C I DDelay Limit
-rta-Off~Nor
DS DR
GyroMotor A Motor B
Motor C
Servo
We use 4 gyro's, 3 for stability and 1 forcontrolling the torque reaction of the motorsmaking the tri-copter want to turn on its axis.So we are going to use 3 gyros connected tothe 3 motors via the speed controller (ESC)and 1 to the servo on the tail.We are going to mount the 3 gyros controllingcyclic movement on their sides and the gyrocontrolling rotation will be mountedconventionally. See gyro template on the nextpage .
To control the tri-copter we are going use the 120 degCCPM system built into most computer transmitters, this issometimes call 3 servo heli swash plate mix. As mentionedabove we are going to use speed controllers instead ofservos for cyclic control. We are using a servo for ruddercontrol.To make things easier we have numbered to gyro's 1-4and the motors A,B&C.
Turn to the next page, cut out the template and mount thegyros onto the frame using the double sided tape provided.You are going to have a mess of wires soon, don't worry,this will be handled to the next few stages. We will alsodelve deeper into the transmitter programming too, mightbe a good time to dig out your transmitter manual and lookup swashplate mixes.
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GYRO SEATING AND POSITIONING
Cut 2 small strips ofdouble sided tape toallow gyro to sit1 i I I IE - : ' ~ ~ . / vertically as shown .
. - - - - - - - - - - - -
. ~Gyro 4e 0
NOTE:SET GYRO 3 TO REV
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RX = Receiver COMPLETE WIRING DIAGRAMCH = ChannelESC = Speed controllerIf your receiver is numbered only, consult your manual to which number matches whichfunction ie 1 = throttle etcAll types of radioGyro 1,2,3 gain (single wire lead to connector board) Gain connector board to RX Gear CHGyro 4 Gain to Spare channelRegulator: RX Batt or Throttle CH
Futaba Ch6 (Aux) Ch1(Aileron) Ch2(Elevator)
ELEV RUD(Rudder)
GEAR(Gain)
GEAR(Gain)
i JRI AUX (auxilia ry 1) AIL (aileron)SpektrumCh4(Rudder) Gain leads
[:t:;--;:::::1=::::E~=:C=5~~=;:==E~~~~servo gyro gain to Aux 2. . . . - - - - . . . . . L . . . . . . a . . . . . . . , or to board.Gyro 1NOR
Gyro 2NOR
Gyro 3REV
Gyro 4NOR
MOTORA MOTORB
= =0 0~ c ; : : /
0 0
ToGYR ToGYRO 1
f1ToGYR04
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RADIO SETTINGS &START UP SEGUENCE
Gyros, all gyro directions set to normal, default except Gyro 3 which is set to reverse,refer to manual.Spektrum I JR settingsGlobal settingsType select :HeliAux 2: GearSwash Type: 3 servos 120degsMenu settingsServo reversing: all set to normalTravel Adjust: Thro 100%, Aile & Elev 50%, Rudd 100%, Gear +50% -35%, Pit +- 60%Swash Mix: 3 servos 120degs, Aile -40%, Elev +40%, Pit +100% EXP INHThro Hold INHThro Curve: NORMAL L 0%, 1 25% ,243%,364%,4 100%Pitch Curve: DefaultDual Rates: Not used
Futaba SettingsREVR 1rev2rev3rev4rev5nor6revDR1 up 50 down402 up 50 down404 up 100 down100EPA130%230%3100%4100%535%630%NTH on 0 255075100NPI on 0255075100ITH inhIPloffHOLD inhREVO inhGYRO -35%SWT inhSWSH a -40%e +40 %P +100%FS channel 3 20%
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The start up sequence is important, as the speed controllers will not"arm" if we don't follow the correct sequence.NO PROPELLERS ON....YETTake the Tri-copter to a flat surface away from obstructions.1. Remove arming switch (plug)2. Turn on transmitter3. Plug in battery (no motor should turn)The receiver should switch on, the four gyro lights will flash and then turn off*,wait a further 5 seconds.4. Plug in the arming switch (plug).The speed controllers should beep a few times** and then stop, be carefulnow the motors are armed and may turn (slowly) if the Tri-copter is moved(this is the gyros doing there job)The tri-copter is now ready to fly, be careful, those motors will start.
* If the lights do not turn off, the gain needs to be changed to negative to putthe gyro into "non heading hold mode". Unplug the battery before attemptingchanges.** If a motor refuses to stop beeping, move the tri-copter around gently toactivate the gyro, again be careful a motor may start.
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RC Control Test . NO PROPELLERS ON PLEASE
Open throttle 1/4, allmotors should run
Close throttle, putleft cyclic, right handmotor should run
Put right cyclic, lefthand motor shouldrun
Put forward cyclic,tail motor should run
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Put back cyclic, fronttwo motors shouldrun
Put in left rudderThe tail motorshould tilt to the right
Put in right rudderThe tail motorshould tilt to the left
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Tricopter ResponseTest
With the Tri-copter on a flat surface, tilt thecopter to the right, keeps hands awayfrom motors as they will run.The right motor should run.
Tilt the copter to the left,The Left motor should run.
Lift the tail of the tri-copterThe front two motors should run
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Lift the front of the Tri-copterThe tail motor should run
Turn the tri-copter on its axis to the rightTurn the tri-copter on its axis to the left. The top of the tail motor should tilt to therightThe top of the tail motor should tilt to theleft
Select the correct prop adaptor, fit the propellers and tighten w ell.
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