Phase 3 J-3 CUB 370 RTF Operating Instructions Manual Download Page 17

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  With the transmitter turned on and the flight battery installed, carefully extend the transmitter antenna completely.

  Double-check that the throttle control stick is pulled completely back, then press the red motor arming switch on the side of the 

fuselage once.

  Carefully grasp the fuselage directly beneath the center of the wing with your thumb and forefingers.  While holding the transmitter 

in your other hand, push the throttle control stick forward to check that the motor powers up.  Now, pull the stick completely back.

  If there is any wind, turn to face it.  While holding the throttle control stick completely forward (the propeller will spin very fast), hold 

the airplane just above shoulder level and gently toss the airplane straight ahead and level.  Allow the airplane to fly straight and 
continue to hold the throttle control stick completely forward so that the airplane climbs.

 

 

If the airplane begins losing altitude after launching, pull back gently (only a small amount) on the right-hand 

control stick (elevator).  This will cause the airplane to gently pitch up and climb.  The airplane may start to bank right or left after 
launching, too.  If this happens, gently move the right-hand control stick (rudder) right or left to level the wing.

HAND LAuNCHING THe J-3 CuB 370 RTF

FLYING THe J-3 CuB 370 RTF

PRO TIP

Continued On Next Page

 

TAKING OFF THe J-3 CuB 370 RTF

PRO TIP

IMPORTANT

  The J-3 Cub 370 RTF can take off from the ground, provided the surface is smooth and hard, such as asphalt, 

concrete or hard-packed dirt.  The airplane can also take off from tightly mowed grass.  If there is no suitable place to take off from 

the ground, you should hand-launch the airplane, following the procedures in the section below.

  With the transmitter turned on and the flight battery installed, carefully extend the transmitter antenna completely.

  Double-check that the throttle control stick is pulled completely back, then press the red motor arming switch on the side of the 

fuselage once.

  Set the airplane on the ground, making sure that the airplane is pointing directly into the wind.  Slowly push the throttle control stick 

forward until the motor is running at full power.  The airplane will quickly begin to accelerate.

 

 

As the motor is powered up and the airplane accelerates, the airplane will have a tendency to pull toward the left.  

This is normal and is caused by the torque from the spinning propeller.  Gently move and hold the right-hand control stick (rudder) 
to the right to keep the nose of the airplane pointing straight ahead.

  As the airplane continues to accelerate faster, the tail of the airplane will begin to lift off the ground and the airplane will now be 

rolling down the runway on its main landing gear.  At this point, the airplane is ready to take off.  To take off, gently pull back on the 
right-hand control stick (elevator) and the airplane will lift off the ground.  Continue to hold the right-hand control stick back gently so 
that the airplane continues to climb.  After the airplane lifts off, you can move the rudder back to center.

WARNING

  Be careful not to climb too steeply after takeoff or the airplane might slow down too much and stall.

PRO TIP

  Once the airplane is in the air, keep the motor running and allow the airplane to continue to climb.  After reaching about 80 - 100 feet 

of altitude you should start making shallow turns, moving the right-hand control stick right or left, to keep the airplane near you.

 

 

We recommend trying to keep the airplane near you while flying.  The airplane is small, so if it gets too far away, it 

will be difficult for you to see.  This will make it more difficult to learn to fly the airplane and could result in complete visual loss of 

the airplane.

 

Now that the airplane has climbed to a safe altitude you can begin to learn the basics of flight.  General flying should be done with 

the motor at full power.  You control the altitude of the airplane by moving the right-hand control stick either forward or back.  Moving 
the stick forward will cause the airplane to pitch down and lose altitude, and moving the control stick back will cause the airplane to 

pitch up and gain altitude.  These control inputs should be done gently, so you don't overcontrol the airplane.

Summary of Contents for J-3 CUB 370 RTF

Page 1: ...gr Wing Loading 13 Ounces Per Square Foot 39 5gr dm2 Molded from Durable Plastic and Foam Preinstalled 4Ch FM 27MHz USA Radio Control System 35MHz EU Three Channel Control Elevator Rudder and Throttle...

Page 2: ...the flight battery may occur To prevent the flight battery from overheating during the charging process allow the flight battery to completely cool before recharging it Always completely discharge th...

Page 3: ...Assembly Fuselage Assembly Not Shown SmalL wood ScrewS 12 Landing Gear Wing Struts and Clips 4 Propeller and Spinner Phase 3 is proud to present the J 3 Cub This trainer aircraft is modeled after air...

Page 4: ...rsing Switches These switches allow you to electronically change the direction the servos move Throttle Control Stick This stick can move both right and left and up and down at the same time and is us...

Page 5: ...e airplane forward Vertical Tail Provides stability for the airplane during turns Wing The wing has a special airfoil shape and provides the main source of lift for the airplane The flight battery inc...

Page 6: ...CUB 370 RTF Step 1 Installing the Transmitter Batteries Continued On Next Page Step 2 Installing the horizontal tail Carefully slide the horizontal tail into the slot in the back of the fuselage When...

Page 7: ...nt portion of the vertical tail down into the mounting slot in the fuselage Push the vertical tail down in position When aligned properly the tab in the base of the vertical tail should fit into the n...

Page 8: ...the radio system later PRO TIP Carefully snap the plastic clevis on the pushrod wire into the outermost hole in the rudder control horn We suggest installing the clevis into the outermost hole in the...

Page 9: ...it firmly onto the front of the propeller The inside of the rubber safety spinner is molded to fit securely over the hex nut and threaded propeller shaft Step 7 Installing the wing Set the wing onto t...

Page 10: ...are four plastic wing struts included There are two longer ones for the front and two shorter ones for the rear When installing them in the next few procedures make sure to install the two front wing...

Page 11: ...ll need to make sure that the transmitter is turned on Turn on the transmitter The needle in the voltage meter should move into the silver safe area If it doesn t replace the batteries with a fresh se...

Page 12: ...he flight battery into the connector that is inside the fuselage When plugged in properly the connectors should click together IMPORTANT As a safety feature the connectors can only be plugged in one w...

Page 13: ...to the left The rudder should move left If the rudder does not move in the correct direction flip the CH 1 servo reversing switch on the front of the transmitter as shown PRO TIP Looking from the back...

Page 14: ...ips Always run the motor until it stops before recharging the flight battery This will ensure that the battery is properly discharged Charge time using the AC wall charger for a fully discharged batte...

Page 15: ...you become a proficient flyer you should always plan on flying your airplane when there s no wind We strongly sug gest waiting for a calm day If it s windy and you attempt to fly it will only make lea...

Page 16: ...will help ensure your success Some Things to Remember With the flight battery fully charged you can expect anywhere from 4 6 minutes of flight time so plan your landing accordingly Make sure that your...

Page 17: ...e ground making sure that the airplane is pointing directly into the wind Slowly push the throttle control stick forward until the motor is running at full power The airplane will quickly begin to acc...

Page 18: ...direction you want move the control stick gently in the opposite direction to level the wing then allow the control stick to return to center The longer you hold the control stick over the tighter th...

Page 19: ...ottle Hold the parts together and in alignment until the glue fully cures Apply a strip of clear Scotch tape over the seams to strengthen the joint even more It is very important that you use no solve...

Page 20: ...ally the transmitter charger and flight battery Do not allow any of the electrical components to get wet or damage may occur Periodically double check that the propeller nut is tight Check the propell...

Page 21: ...rystal Set Ch 3 PH109024 27MHz FM Crystal Set Ch 4 PH109025 27MHz FM Crystal Set Ch 5 PH109026 27MHz FM Crystal Set Ch 6 PH109028 Motor Controller Sorry No Photo Available PH109030 Receiver w o Crysta...

Page 22: ...ter trim tab as control input described on page 19 5 Airplane constantly climbs or A You are flying in too much wind A Fly when there is no wind descends without any B The airplane is out of trim adju...

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