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RADIAL ROCKET                 Item code: BH155

.                     

Instruction Manual

A/B Epoxy glue.

Pilot

Position the canopy so the rear frame on the canopy is 

aligned with the rear edge of the cockpit opening. Use 

canopy glue to secure the canopy to the canopy hatch. 

Use low-tack tape to hold the canopy in position until 

the glue fully cures. Wrap the tape completely around 

the canopy hatch, as the tape does not stick well to 

the covering. We used balsa sticks to hold the lower 

edges of the canopy tightly against the canopy hatch.

Install  the  spinner  backplate,  propeller  and  spinner 

cone. The spinner cone is held in place using two 3mm 

x 8 mm machine screws.  

XV. INSTALLINg THE SPINNER

BALANCINg

 

1) 

It is critical that your airplane be balanced cor-

rectly. Improper balance will cause your plane to lose 

control and crash.

THE CENTER OF GRAVITY IS LOCATED 

95MM

 BACK 

FROM THE LEADING EDGE OF THE WING.

 

2)

 Mount the wing to the fuselage. Using a couple 

of pieces of masking tape, place them on the top side 

of the wing

 95mm

 back from the leading edge, at the 

fuselage sides.

 

3) 

 Turn the airplane upside down. Place your fingers 

on the masking tape and carefully lift the plane.

Accurately  mark  the  balance  point  on  the  top  of  the 

wing on both sides of the fuselage. The balance point 

is located 

95mm

 back from the leading edge. This is 

the balance point at which your model should balance 

for your first flights. Later, you may wish to experiment 

by shifting the balance up to 10mm forward or back to 

change the flying characteristics. Moving the balance 

forward may improve the smoothness and arrow- like 

tracking, but it may  then require more speed for take 

off  and make it more difficult to slow down for landing. 

Moving the balance aft makes the model more agile 

with a lighter and snappier ”feel”. In any case, please 

start at the location we recommend.

With the wing attached to the fuselage, all parts of the 

model installed ( ready to fly), and empty fuel tanks, 

hold the model at the  marked balance point with the 

stabilizer level.

Lift the model. If the tail drops when you lift, the model 

is “tail heavy” and you must add weigh* to the nose. If 

the nose drops, it is “nose heavy” and you must add 

weight* to the tail to balance. 

*If possible, first attempt to balance the model by  chang

-

ing the position of the receiver battery and  receiver. If 

you are unable to obtain good balance by doing so, then 

it will be necessary to add weight to the nose or tail to 

achieve the proper balance point.

Summary of Contents for BH155

Page 1: ... 000 5 000mAh ESC 60A Receiver battery 6V 1200 2000mAh NiMH Wingspan 1 410mm 55 51in Length 1 235mm 48 62in Weight 3 3 2kg 6 6 7 04lbs Wing area 29 7dm Wing loading 104 5g dm Wing type Naca Airfoil Spinner 80mm Parts listing required not included Radio 05 channels Servo 07 servos Made in Vietnam 95 ALMOST READY TO FLY RADIAL ROCKET Item code BH155 Instruction Manual Book ALL BALSA PLY WOOD CONSTRU...

Page 2: ...LY 1 Vertical stabilizer with pre installed rudder 1 Horizontal stabilizer with pre installed elevator halves To avoid scratching your new airplane do not unwrap the pieces until they are needed for assembly Cover your workbench with an old towel or brown paper both to protect the aircraft and to protect the table Keep a couple of jars or bowls handy to hold the small parts after you open the bag ...

Page 3: ...te regarding the film covering Minor creases or bubbles may develop in the film covering due to major fluctuations in weather conditions temperature humidity etc in rare cases you may even find a slight warp in a component These minor faults are in the nature of film covered built up wooden structures and can easily be corrected using a heat gun as commonly used for modelling Creases Blow warm air...

Page 4: ...on servos 1 Install the rubber grommets and brass eyelets on to the aileron servos 2 Using a modeling knife remove the covering from over the pre cut servo arm exit hole on the aileron servo tray hatch This hole will allow the servo arm to pass through when installing the aileron pushrods Servo tray Remove the covering Aileron Flap Bottom side REPLACEMENT SMALL PARTS 3 x 12mm 7 5 4x25mm 3 3x15mm 4...

Page 5: ... the slot and secure it by A B Epoxy glue 4 Using the thread as a guide and using masking tape tape the servo lead to the end of the thread carefully pull the thread out When you have pulled the servo lead out remove the masking tape and the servo lead from the thread Drill a hole 1 5mm Secure Electric wire Electric wire 1 A B Epoxy glue 2 Push in Aileron control horn 4 installing the aileron link...

Page 6: ...posite wing half After both linkages are completed connect both of the aileron servo loads using a Y harness you have purchased Insert the 90 degree bend down through the hole in the control horn Install one nylon snap keeper over the wire to secure it to the control horn Install the control horn retaining screw and remove the masking tape from the aileron Flaslink Pushrod wire Control horn Bend a...

Page 7: ... Instruction Manual 3x15mm 3x10mm Secure Drill 5 holes 2 5mm Repeat the procedure to install the opposite gear IV INSTALLING THE engine mount OPTION 1 ELECTRIC MOTOR There are two options 1 Electric motor 2 Engine mount 4x60mm 3x15mm ...

Page 8: ...t about 8mm away from the rear of the tank and move freely inside the tank Connect one end of the line to the weighted clunk and the other end to the nylon pick up tube in the stopper 3 Carefully bend the second nylon tube up at a 45 degree angle using a cigarette lighter This tube will be the vent tube to the muffler 4 Carefully bend the third nylon tube down at a 45 degree angle using a cigarett...

Page 9: ...easily 9 To secure the fuel tank in place apply a bead of silicon sealer to the forward area of the tank where it exits the fuselage behind the engine mounting box and to the rear of the tank at the forward bulkhead Do not secure the tank into place permanently until after balancing the airplane You may need to remove the tank to mount the battery in the fuel tank compartment See pictures below se...

Page 10: ...he cowl for muffler clearance Connect the fuel and pressure lines to the carburetor muffler and fuel filler valve 5 Drill four 2 5mm pilot holes through both the cowl and the side edges of the firewall Using a 3mm drill bit enlarge the four holes in the cowling IX INSTALLING horizontal STABILIZER Cowl area cutout for muffler Cowl area cutout for engine head 1 Elevator install as same as the way of...

Page 11: ...ottom of the tail plane Make sure you only cut with enough pressure to only cut through the film and not the wood Cutting into the balsa structure may weaken it This could lead to possible failure during flight Top side and bottom side Remove the covering ELEVATOR CONTROL HORN INSTALLATION Bottom side control horn 1 A B Epoxy glue 2 Push in Elevator control horn install as same as the way of ailer...

Page 12: ...d down at the mark made Cut off the excess wire leaving about 6mm beyond the blend 2 Insert the 90 degree bend down through the hole in the servo arm Install one nylon snap keeper over the wire to secure it to the arm Install the servo arm retaining screw VIi Rudder INSTALLATION Rudder install as same as the way of aileron Top side C A glue M2 Lock nut M2 Elevator pushrod Bottom side Silicone Tube...

Page 13: ...place on the ply wood plate The pivot point of the tail wheel wire should be even with the rudder hinge line and the tail wheel bracket should be centered on the plywood plate 2 Mark the locations of the two mounting screws Remove the tail wheel bracket and drill 2mm pilot holes at the locations marked 3 Secure the tail wheel bracket in place using three 3mm x 12mm wood screws Be careful not to ov...

Page 14: ... band or masking tape to hold the foam in place 5 Position the battery pack and receiver behind the fuel tank Use two tie wraps to hold the battery and receiver securely in place as pictures below Do not permanently secure the receiver and battery until after balancing the model 6 Using a 2mm drill bit drill a hole through the side of the fuselage near the receiver for the antenna to exit Locate t...

Page 15: ...efully lift the plane Accurately mark the balance point on the top of the wing on both sides of the fuselage The balance point is located 95mm back from the leading edge This is the balance point at which your model should balance for your first flights Later you may wish to experiment by shifting the balance up to 10mm forward or back to change the flying characteristics Moving the balance forwar...

Page 16: ...Rudder Low 20mm left right High 22mm left right CONTROL THROWS 10mm 10mm 16mm 8mm 8mm 20mm 20mm Flap control Aileron control Elevator control Rudder control PRE FLIGHT CHECK 1 Completely charge your transmitter and receiver batteries before your first day of flying 2 Check every bolt and every glue joint in your plane to ensure that everything is tight and well bonded 3 Double check the balance of...

Page 17: ...rs on a fire this can lead to an explosion Keep all onlookers especially small children and animals well back from the area of operation This is a flying aircraft which will cause serious injury in case of impact with a person or animal NEVER fly near power lines aerials or other dangerous areas including airports motorways etc ALWAYS adjust the engine from behind the propeller and do not allow an...

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