Model Tech Magic Formula 3D ARF, Manual

Page 1: ...w in the box with all original packaging and your dated sales receipt to the place of purchase Kit Product Number 123771 Model Tech makes 3D more fun with more performance The no compromise Magic Formula 3D ARF is a true aerobatic machine Two years and thousands of R D hours went into the making of this unique and beautiful flying machine The Magic Formula 3D ARF is drawn in 3D CAD then each kit i...

Page 2: ... we recommend that you contact the AMA at the address below They will be able to help you locate a flying field near you Academy of Model Aeronautics 5151 East Memorial Drive Muncie IN 47302 9252 800 435 9262 www modelaircraft org SAFETY WARNING Check out our website for more information on this and other exciting Model Tech products http modeltech globalhobby com Safety Warning 2 Introduction 3 C...

Page 3: ...ut the small parts in after you open the accessory bags We re all excited to get a new airplane in the air but take your time This will ensure you build a straight strong and great flying airplane If you come across this symbol it means that this is an important point or an assembly hint If you should find a part missing or damaged or have any questions about assembly please contact us at the addr...

Page 4: ... spoileron to elevator mixing Because of the large control surfaces using ball bearing servos is a must For crisp positive control we suggest using high quality dual ball bearing servos with a minimum of 45 55oz in of torque on the flight control surfaces For throttle control a standard ball bearing servo can be used Although you would lose mixing capabilities the airplane can be flown using a bas...

Page 5: ...r in direct sunlight for any length of time The extreme heat could distort the molded parts and or cause the covering material to wrinkle and possibly damage the fragile components of the radio control system WARNING The fiberglass cowling on your Magic Formula 3D ARF is painted The blow molded wheel pants and canopy are made from plastic Do not use any harsh chemical cleaners such as Acetone to c...

Page 6: ...ine Screws 4 M4 Lock Nuts 2 Nylon Spacers 2 M2 x 10mm Flange Head Wood Screws 13 M4 Flat Washers AILERON CONTROL SYSTEM 2 3 1 8 Threaded Wires w 90º Bends 2 Nylon Control Horns w Backplates 2 Nylon Clevises 2 Nylon 90º Snap Keepers 4 M2 x 16mm Machine Screws 8 C A Style Hinges ELEVATOR CONTROL SYSTEM 2 6 3 8 Threaded Wires w 90º Bends 2 Nylon Control Horns w Backplates 2 Nylon Clevises 2 Nylon 90º...

Page 7: ...y Mixing Cups Global Heat Gun YOU LL NEED THE FOLLOWING PARTS FROM THE KIT YOU LL NEED THE FOLLOWING TOOLS AND SUPPLIES SECTION 5 WING ASSEMBLY STEP 1 INSTALLING THE AILERON SERVOS Remove the aileron and hinges from one wing panel and set them aside Install the rubber grommets and brass collets onto one aileron servo making sure to install the collets with the flanges toward the bottom of the serv...

Page 8: ...holes for the mounting screws Repeat the previous procedures to install the aileron servo into the second wing panel STEP 2 ALIGNING THE WING PANELS Using a modeling knife cut away and remove the excess covering material that overlaps onto the root ribs of each wing panel leaving about 1 16 overlapped so it does not pull away IMPORTANT It s very important to the integrity of the wing center sectio...

Page 9: ...ls together with the wing joiner temporarily installed without using glue While holding the two wing panels together firmly make sure that the wing panels are lined up at both the leading and trailing edges then look carefully at the center section joint the wing panels should fit together tightly with few or no gaps in the joint IMPORTANT If the wing panels do not fit together properly remove the...

Page 10: ...root ribs and the wing joiner Not using enough epoxy can result in wing failure during flight Slide the two wing panels together and realign them Quickly wipe away any excess epoxy using a paper towel and rubbing alcohol and use pieces of masking tape to hold the two wing panels aligned until the epoxy fully cures STEP 4 CHECKING THE WING CENTER SECTION JOINT Once the epoxy has fully cured remove ...

Page 11: ...to ensure a strong glue joint STEP 2 MOUNTING THE WING Align the holes in the wing with the preinstalled blind nuts in the wing mounting block inside the fuselage Secure the wing into place using two M4 x 40mm machine screws and two M4 flat washers Don t overtighten the screws You don t want to crush the wing Turn the fuselage over and check the fit between the wing and the wing saddle There shoul...

Page 12: ... the bottom of the belly pan With the wing installed onto the fuselage position the belly pan onto the wing When lined up properly the sides and bottom of the belly pan should be even with the sides and bottom of the fuselage and there should be few or no gaps between the base of the belly pan and the wing Some small gaps between the belly pan and the wing are normal They will be filled with silic...

Page 13: ... securely in place using pieces of masking tape until the silicon sealant completely cures IMPORTANT It will take the silicon sealant about 24 hours to fully cure We suggest not moving the assembly during this time You must allow sufficient time for the silicon sealant to dry After the silicon sealant has fully cured look carefully at the glue joint between the belly pan and the wing If there are ...

Page 14: ...ing edge where it meets the fuselage sides With the marks on the stabilizer lined up with the fuselage sides hold only the trailing edge of the stabilizer in position using a T Pin IMPORTANT The front of the stabilizer should be able to pivot from side to side and the back should stay firmly in place and aligned The trailing edge should not be allowed to move from side to side With the wing mounte...

Page 15: ...he stabilizer where it meets the fuselage sides Do this on both the top and the bottom C C 1 Remove the stabilizer from the fuselage and use a modeling knife to carefully cut away and remove the covering material from between the lines you drew Do this on both the top and the bottom WARNING When cutting through the covering to remove it cut with only enough pressure to cut through only the coverin...

Page 16: ...tabilizer mounting slot in the top of the fuselage The slot is 6 long and 5 16 wide While holding the vertical stabilizer firmly in place use a pencil to draw a line on each side of the vertical stabilizer where it meets the top of the fuselage Remove the vertical stabilizer and use a modeling knife to carefully cut away and remove the covering material from below the lines you drew Remove the cov...

Page 17: ...ges are designed to be glued into place using thin C A Do not glue these hinges into place using any other type of glue such as thick C A or epoxy Use of any adhesive other than thin C A could result in failure of the hinges during flight For flutter free control surfaces and crisp control response it is imperative that the hinges be glued in properly This is achieved by having a tight hinge gap n...

Page 18: ...e line using C A Debonder PRO TIP STEP 2 HINGING THE ELEVATOR HALVES Hinge the elevator halves using the same techniques that you used to hinge the ailerons Each elevator half is hinged using three hinges When hinging the elevator halves there should be a 1 16 wide gap between the ends of the stabilizer and the elevator counterbalances There should also not be more than a 1 32 wide hinge gap IMPOR...

Page 19: ... Bit Ernst Airplane Stand Ruler Pencil YOU LL NEED THE FOLLOWING PARTS FROM THE KIT YOU LL NEED THE FOLLOWING TOOLS AND SUPPLIES SECTION 10 TAIL SKID INSTALLATION 1 Prebent Tail Skid 2 Nylon Mounting Straps 4 M2 x 10mm Wood Screws STEP 1 INSTALLING THE TAIL SKID Using a modeling knife cut away and remove the covering material from over the tail skid mounting slot in the bottom of the fuselage The ...

Page 20: ...2 Main Gear Wheels 2 M4 x 35mm Threaded Axles 3 M4 x 16mm Machine Screws 4 M4 Lock Nuts 2 Nylon Spacers 2 M2 x 10mm Flange Head Wood Screws 13 M4 Flat Washers STEP 1 INSTALLING THE LANDING GEAR BRACKET Using a modeling knife cut away and remove the covering material from over the three predrilled landing gear mounting holes in the bottom of the fuselage The location of the holes should be visible ...

Page 21: ...in one wheel pant Slide one main gear wheel onto one M4 x 35mm threaded axle flat side first Slide one nylon spacer up against the wheel then slide three M4 flat washers up against the nylon spacer Thread one M4 lock nut onto the threaded axle and tighten it firmly Use 220 grit sandpaper to sand the edges of the wheel pant opening smooth IMPORTANT When you tighten the lock nut the wheel should spi...

Page 22: ...ing knife to make a small pilot hole in the wheel pant using the predrilled hole in the landing gear bracket as a guide Install and tighten one M2 x 10mm flange head wood screw to lock the wheel pant into place and keep it from rotating IMPORTANT Don t overtighten the wood screw or you might strip the plastic IMPORTANT Tighten the lock nut firmly so that the wheel pant cannot rotate under pressure...

Page 23: ...and to allow the muffler to exit the side of the fuselage Install the two engine mounting beams onto the firewall using four M4 x 20mm socket cap screws and four M4 flat washers Tighten the screws firmly to hold the engine mounting beams securely in place Blind nuts have been preinstalled into the back of the firewall to thread the screws into We suggest applying Blue Threadlocker to the screws to...

Page 24: ...a 5 32 diameter drill bit Install the engine using four M4 x 25mm socket cap screws eight M4 flat washers and four M4 lock nuts Tighten the screws and lock nuts firmly to hold the engine securely into place Kwik Bond Thin C A 1 2 Phillips Head Screwdrivers Wire Cutters Needle Nose Pliers Electric Drill 1 16 5 64 Drill Bits Ernst Airplane Stand Ruler YOU LL NEED THE FOLLOWING PARTS FROM THE KIT YOU...

Page 25: ...l only need to make a slight bend in the pushrod wire to line up with your engine s throttle arm IMPORTANT If you re using a two stroke engine don t make a 180º bend in the pushrod wire as shown in the next procedure Using a pair of pliers carefully make a shallow 180º bend in the pushrod wire Slide the plain end of the pushrod wire into the predrilled hole in the firewall then reinstall the throt...

Page 26: ...to their lowest positions Slide the adjustable pushrod connector servo horn assembly over the plain end of the throttle pushrod wire IMPORTANT So that the fuel tank does not interfere with the pushrod wire when it s installed later you will need to cut a shallow notch in the side of the forward bulkhead for the pushrod wire to ride in You will also need to make a shallow bend in the pushrod wire s...

Page 27: ... stopper Using a ruler measure the distance that the two aluminum tubes protrude from the front of the stopper assembly This distance should be 3 8 If it is not adjust the tubes by pushing them forward or backward until you are satisfied with the alignment Carefully bend the longer of the two aluminum tubes up at a 45º angle being careful not to kink the tubing as you bend it IMPORTANT When the st...

Page 28: ...ds of the fuel tubing through the predrilled hole in the firewall and slide the fuel tank into position making sure that the stopper assembly lines up with and is firmly pushed into the predrilled hole in the firewall IMPORTANT When you slide the fuel tank into position make sure that the top of the fuel tank is toward the top of the fuselage To align the fuel tank properly the fuel tank should be...

Page 29: ...the left side of the fuselage is located 1 3 4 up from the bottom of the fuselage IMPORTANT The elevator control system uses two separate elevator servos and pushrod assemblies one on each side of the fuselage The servos are installed offset so that no servo reverser is necessary Install the rubber grommets and brass collets onto both elevator servos making sure to install the collets with the fla...

Page 30: ...ssembly onto the other elevator half PRO TIP IMPORTANT Both elevator pushrod assemblies are assembled and installed exactly the same The only difference is that the servo arm on the right side of the fuselage will point up and the servo arm on the left side of the fuselage will point down Because the elevator servos are mounted offset there is no need to use a servo reverser The two elevator servo...

Page 31: ...o ensure that the pushrod assemblies do not bind They should operate smoothly in both directions IMPORTANT When you connect the elevator servo leads together with a Y harness both elevator halves should move the same direction IMPORTANT It s important that both elevator halves track evenly together throughout the entire range of deflection If one elevator half moves more than the other this will c...

Page 32: ...er servo making sure to install the collets with the flanges toward the bottom of the servo Install the rudder servo into the plywood servo tray making sure to drill 1 16 diameter pilot holes for the mounting screws IMPORTANT The servo output shaft should be toward the back of the fuselage as shown STEP 2 INSTALLING THE RUDDER PUSHROD ASSEMBLY Using a modeling knife cut away and remove the coverin...

Page 33: ... for the control horn mounting screws Before installing the control horns in the next procedure drip several drops of thin C A into the pilot holes and allow the C A to fully cure The C A will harden the surrounding balsa making the mounting area stronger Position one nylon control horn onto one side of the rudder When aligned properly the centerline of the control horn should be 3 above the botto...

Page 34: ... Ideally the pushrod wires should be as tight as possible while still allowing the rudder to return to center The pushrod wires should not have slack in them yet they should not be so tight that the linkage and or the servo bind Kwik Bond Thin C A 1 Phillips Head Screwdriver Wire Cutters Needle Nose Pliers Excel Modeling Knife Electric Drill 5 64 Drill Bit Ruler Pencil Masking Tape YOU LL NEED THE...

Page 35: ...e The front of the control horn should be angled slightly to line up better with the pushrod wire too Install the servo horn retaining screw to secure the servo horn to the servo Repeat the previous procedure to install the servo horn and pushrod wire onto the aileron servo in the other half of the wing When satisfied with the alignment mark the locations of the two mounting holes then drill 5 64 ...

Page 36: ...ll allow both aileron servos to be plugged into the aileron channel in your receiver If you will be flying your Magic Formula 3D ARF using a computer radio with mixing capabilities you may want to plug each aileron servo lead into your receiver separately into Ch 1 and Ch 6 to take advantage of your radio s mixing capabilities Kwik Bond Thin C A 1 Phillips Head Screwdriver Excel Modeling Knife Ele...

Page 37: ...d there should be about a 1 16 wide gap between the front of the cowling and the back of the spinner backplate The painted trim on the cowling should line up with the corresponding trim on the fuselage too When satisfied with the alignment use pieces of masking tape to hold the cowling securely in place and aligned STEP 2 MOUNTING THE COWLING With the cowling held firmly in alignment drill 5 64 di...

Page 38: ...r M3 x 5mm wood screws to hold the cowling firmly in place Install your high speed needle valve and propeller then install the spinner cone using the two screws provided Pacer Formula 560 Canopy Glue Scissors 220 Grit Sandpaper w Sanding Block Masking Tape Paper Towels YOU LL NEED THE FOLLOWING PARTS FROM THE KIT YOU LL NEED THE FOLLOWING TOOLS AND SUPPLIES SECTION 19 CANOPY INSTALLATION 1 Molded ...

Page 39: ...e method Strips of Velcro work well or sandwich them in place using a couple of scraps of balsa wood glued between the fuselage sides A flat battery pack can be mounted in the fuel tank compartment if necessary IMPORTANT If you re using a lightweight two stroke engine it may be necessary to mount the battery pack in the fuel tank compartment to balance the airplane After installing the receiver dr...

Page 40: ... Once you have flown and become familiar with the flight characteristics of the airplane the C G can be moved fore or aft within the C G range to change the flight performance Moving the C G back will cause the airplane to be more responsive but less stable Moving the C G forward will cause the airplane to be more stable but less responsive DO NOT FLY THE AIRPLANE BEYOND THE RECOMMENDED BALANCE RA...

Page 41: ...ring material to both the trailing edge of the flying surface and the leading edge bevel of the control surface Use a modeling knife to trim the excess covering material flush with both surfaces Pivot the control surface up and down several times to check for free movement The control surface should be able to smoothly pivot completely up and completely down without interference from the hinge gap...

Page 42: ...radio to enjoy the flying qualities of the Magic Formula 3D ARF if you re planning on doing extreme 3D aerobatics it is recommended Before making any adjustments please read and understand your radio s setup manual READ THIS BEFORE GOING FURTHER The 3D aerobatic control throws listed below make the airplane extremely control sensitive Use these control throws only if you have a computer radio that...

Page 43: ...o the fuselage There s nothing worse than the battery pack coming loose during a violent aerobatic maneuver Double check that the fuel tank is properly secured into the fuselage Double check the balance of the airplane Do this with the fuel tank EMPTY Check the control surfaces They should all move in the correct direction and not bind Make sure that you ve installed 1 4 long pieces of clear tubin...

Page 44: ...aw Into the wind perform inside loops using only elevator Repeat test performing outside loops from an inverted entry A Wing is level throughout B Airplane yaws to right in both inside and outside loops C Airplane yaws to left in both inside and outside loops D Airplane yaws to the right in inside loops and yaws to the left in outside loops E Airplane yaws to the left in inside loops and yaws to t...

Page 45: ...ock Model Tech or Global products you can order replacement parts directly from us using the Customer Service Information on page 3 SECTION 28 REPLACEMENT PARTS Magic Formula 3D ARF Complete 123771 Instruction Manual 120265 Wing Set 120266 Fuselage Set 120267 Stabilizer Set 120268 Belly Pan 120269 Canopy 120270 Tail Skid 120271 Fuel Tank 320cc 120272 Landing Gear Bracket 120273 Cowling 120274 Whee...

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