KOR MODEL Zlin Z-37A Cmelak, Assembly Instructions Manual

Page 1: ...1 Zlín Z 37A Čmelák Bumblebee 850 mm Assembly Instructions and recommended equipment of the RC model ...

Page 2: ...ed in the set Fuselage parts 2 pc Center section of the wing 1 pc Outer Wing parts left hand right hand 2 pc Engine cowling 1 pc Engine shutter 3D printed part 1 pc Tail group empennage 2 pc Main Landing gear wire ø 2 mm 1 pc Main Landing gear wheels 2 pc Tail Landing gear wheel 1 pc Steel wire for pushrods ø 1 mm 1 pc Pushrod tube Plastic inner ø 1 mm 1 pc Foil for windshield 1 pc Sticker for the...

Page 3: ...placed according the picture The receiver behind the cockpit the motor Electronic Speed Controller ESC between the wing and the engine cowling and the servos for the rudder and elevator in the cockpit The opening for the battery shall be made after the whole model is finished to maintain the correct position of the Center of Gravity CG Draw a center line on the horizontal stabilizer Cut a piece of...

Page 4: ... to run from the elevator control horn all the way to the cockpit where the elevator servo will be placed Choose an appropriate position of the servo according to its size and the size of its lever Guide the pushrod tube with the pushrod to the servo lever in the easiest way without unnecessary bends Prepare an opening for the servo that is 1 mm smaller from all sides than the servo This gives the...

Page 5: ...de the pushrod tube onto the wire and pull it through the fuselage The rest of the tube is to cut into the left side part of the fuselage in the same way as in the right side Cut in the rudder servo in the same way as the elevator servo in the right side part of the fuselage Prepare a Z Bend on the wire again and insert it in the longer control horn which will later be glued to the rudder from bel...

Page 6: ...shrink tubing Bend the tail landing gear from the ø 1 mm steel wire according to the drawing at the end of this manual slide a piece of the pushrod tube on it before the upper part of the landing gear is bent Turn the left side part of the fuselage upside down add the vertical stabilizer with rudder to it and create a groove for the plastic tube as on the figure Align the tail landing gear wire to...

Page 7: ...bed above PU glue CA Slide the fiberglass plate onto the tail landing gear from below and glue it to the fuselage with CA Insert the control horn in the elevator onto the pushrod Z Bend and place the horizontal stabilizer on the fuselage according the center line Check if the elevator can move freely and glue it perpendicular in both directions to the fuselage Glue it again with PU glue CA ...

Page 8: ...The opening in the bulkhead is prepared eccentrically because of the correct side thrust and down thrust The bulkhead must be glued into the fuselage so that the opening is more in the upper right corner in view from the front see picture Roughen the bulkhead before gluing and glue it thoroughly with CA to the fuselage Mount the motor and align it slightly to the right and downward spacer in the t...

Page 9: ...ess them after painting the model in the cowling The shaft of the motor should come out approximately in the center of the shutters with the correct side thrust and down thrust Cut an opening in the rear wall of the cockpit as access to the receiver and the servo cables The cut should be straight so that the cut out EPP part can be inserted back in after connecting the receiver the EPP part can be...

Page 10: ...htly deeper on the side where they are glued to the center wing section so that the carbon strip of the center wing section in the outer wings also has enough space in the correct dihedral Glue the carbon strips into all wing parts with thin CA but do not glue them in the places where the strips will overlap about 30 mm from the edges Note If you also want to retrofit the flaps the wing trailing e...

Page 11: ...t out in each direction about 1 mm smaller Glue the servos in after painting the model Prepare the pushrods for the aileron linkage The length corresponds to the distance between the control horn and servo lever with Z bends on both ends It is recommended to make a V bend on the pushrod in the middle so that the length can be adjusted later see picture The servo cables are routed in cuts not too d...

Page 12: ...nt of the wing center section and wing outer parts This stiffener must be cut so deeply that it is flush with the underside of the wing and its shorter side from the groove for the landing gear is towards the leading edge Glue this stiffeners with CA before gluing the landing gear The depth of the L shaped groove in the wing must be as deep as the groove in the stiffener It is recommended to apply...

Page 13: ...ile on the created flaps Fix the flaps with pins in their original position For each hinge two levers are cut into the wing with another lever between them in the flap Cut the hinges about 10 mm from the side edges of the flaps Important The levers on the inner flaps close to the fuselage are for the linkage so the right angled levers must be installed there Slide longer pieces of wire ø 1 mm thro...

Page 14: ...can be connected by a piece of bend wire Glue the tubes from the outside carefully Bend a piece of ø 1 mm wire so that the angle is similar to that of the glued in tubes Insert the wire into the tubes only do not glue it Attach a variable linkage connector to the servo lever and connect to the right angled levers with 2 wires with Z bends Alternatively only one wire in V shape and with Z bends at ...

Page 15: ... are pressed into the fuselage after painting the model and glued with CA gently apply the glue with a needle for example so that no white stain is created Finishing of the model Sand the model with a sanding mesh for drywall for a better finish if required Paint the model with either water based paints or spray paint we recommend Montana spray paint it is cheap and has excellent adhesion or Dupli...

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Page 17: ...17 It is recommended to attach wire to the wing ends from below to protect them from contact with the ground ...

Page 18: ...ot fall out during flight The cables from the battery and ESC can be led to the outside to be able to connect and disconnect them easily First flight If possible choose a windless day for the first flight If you don t have much experience with test flying of a model please ask a more experienced model buddy to check the model and to help with the maiden flight A hard surface is recommended for tak...

Page 19: ...19 Bending of the main landing gear legs ...

Page 20: ...20 Tail landing gear Bending of the windshield Fold here ...

Page 21: ... wing PRINT 1 1 95 mm Anti Slip Strip left wing PRINT 1 1 Tail number of the fuselage PRINT 1 1 Tail number for the wing PRINT 1 1 Cockpit panel PRINT 1 1 Carbon stringer position in the wing Text for the vertical stabilizer ...