Stevens AeroModel microMAX 103 Build Instructions Download Page 1

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microMAX

103

Wayne Ison’s part 103 legal home built.

Wing Span:

18.5 inches |

Wing Area:

65 square inches |

Average Flying Weight:

1.5 ounces

Build Instructions -

Version 1.0

(revised 05.13.2014)

Build Instructions

Page 1

Summary of Contents for microMAX 103

Page 1: ...home built Wing Span 18 5 inches Wing Area 65 square inches Average Flying Weight 1 5 ounces Build Instructions Version 1 0 revised 05 13 2014 Build Instructions microMAX 103 Build Instructions 2013 Stevens AeroModel all rights reserved Page 1 ...

Page 2: ...s kit immediately in new and unused condition to the place of purchase THIS PRODUCT IS NOT INTENDED FOR CHILDREN 12 YEARS OF AGE OR YOUNGER WARNING This product may contain chemicals known to the state of California to cause cancer and or birth defects or other reproductive harm PRODUCT SUPPORT This product has been engineered to function properly and perform as advertised with the suggested power...

Page 3: ... 11x17 Pre Cut Acetate Windscreen Taped to back of wood brick 1 0 032 in x 12 in wire Landing Gear 2 0 015 in x 12 in wire Pushrods Hardware Bag 1 2 in length of 1 16 in diameter Heat Shrink Tube 1 Nylon Receiver Clip 1 1 16 in x 1 3 4 in Aluminum Tube 1 Pair Plastic Wheels SIGSH540 Build Instructions microMAX 103 Build Instructions 2013 Stevens AeroModel all rights reserved Page 3 ...

Page 4: ...Trim Color bright red Wood Sealant Suggestions While not required it is suggested that a high quality lacquer based clear sealant be applied SPARINGLY to seal and protect the wood grain in humid environments One single light misting of this sealant will be sufficient to repel water without adding significantly to the models final flying weight Likewise much of this model can be colored using a com...

Page 7: ... tabs notches and otherwise interlocks like a 3D puzzle we suggest that when fitting parts you dry fit use no glue the parts together first It s advised to work 1 2 steps ahead in the instructions using this dry fit technique which allows ample opportunity to inspect the fit and location of assembled components and realizes a benefit as each successive part contributes to pulling the entire assemb...

Page 8: ... part F2 Ensure that the long arm of the Receiver Clip is oriented toward the front of F2 indicated by the arrows Bond with CA glue 2 Fit and tack glue former F3 to the front of F2 Ensure that the top of F3 is oriented to correspond with the top of F2 3 Fit and tack glue former F4 to the rear of F2 again orienting top of part to top of F2 4 Fit the fuselage doubler F5 to the left side of the crutc...

Page 9: ... all rights reserved Page 9 Step 1 F1 F2 top F2 F3 Step 2 Step 3 Step 4 Step 4 Cont Step 5 Step 6 Step 7 F4 F5 Nylon Clip Bottom View f r o n t F3 Tabs Protrude Slightly F6 F7 F8 Slots top F2 top top top top F3 F1 F2 F4 F4 F5 F3 F3 F5 F6 behind F7 F4 F5 F7 F6 behind F7 right ...

Page 10: ... and fit the assembly to the front of former F3 Ensure that the assembly is fully seated against F3 with no gaps then final bond the motor mount assembly together and to F3 with thin CA Mount the Motor Prior to completing the following motor mount sequence you should test your motor and receiver for proper function Though rare both new and recently removed reclaimed used motors may not function pr...

Page 11: ...oModel all rights reserved Page 11 Step 7 Cont Step 8 Step 9 Step 10 Step 14 Step 13 Step 12 Step 11 F8 F9 F10 F11 F12 bottom F14 F13 F15 bottom F12 F15 Bottom View Bottom View Sand Smooth F7 F6 F5 F3 F7 F6 F3 F5 F7 F6 F5 F3 F5 behind F11 F7 left top bottom F12 F14 F13 ...

Page 12: ...uld not need to be removed For a permanent bond use CA glue If you do not mind the extra cure time white glue and or silicone caulk works well and makes later removal of the motor cleaner 18 Fit ply part F16 to top of F12 straddling the motor Ensure that F16 is perpendicular 90 degrees to F12 Tack glue to retain 19 Now fit part F17 by sliding it over F16 and engaging the tabs on the top of F3 Bond...

Page 13: ...ghts reserved Page 13 Step 15 Step 15 Cont Step 16 Step 16 Cont Step 20 Step 19 Step 18 Step 17 F2 Feed lead through opening in F3 and under F2 Bottom View F2 left Hole Bottom View Top View F12 F17 F18 Bond No Glue No Glue F16 F12 Radio Compartment F15 F3 F15 F4 F4 F2 F12 F16 F3 F4 ...

Page 14: ... pop during this procedure they will still hold When you are satisfied that the fuselage is straight and true final bond F18 F19 and F20 to the fuselage sides no illustration 26 Fit and bond part F21 to the bottom of the fuselage between F3 and the landing gear pocket Ensure that the slot in the landing gear pocket is not obstructed and that no glue enters the slot Nose 27 Fit nose block part F22 ...

Page 15: ... rights reserved Page 15 Step 21 Step 22 Step 23 Step 24 Step 29 Step 28 Step 27 Step 26 F19 F18 Bottom View Bottom View Bottom View Bottom View Bottom View Bottom View Bottom View F19 F20a F20b F20 F21 F20 F22 F23 F24 F11 F7 F11 F7 F7 F11 F8 F3 F10 F15 F3 F22 F22 F23 F3 F3 F18 ...

Page 16: ...Lightly sand the rest of the completed fuselage and set it aside until the Final Assembly Tip When sanding the fuselage be careful NOT to knock off the mounting tabs for the elevator assembly Instrument Panel 34 Lay the ply instrument panel I1 on the table etched side down Fit two ply parts I2 to the back side of I1 and bond with medium CA Faux Motor 35 Begin by gathering together parts M2 M3 M4 a...

Page 17: ...ild Instructions 2013 Stevens AeroModel all rights reserved Page 17 Step 30 Step 31 Step 32 Step 33 Step 36 Step 35 Step 34 Step 33 Cont F25a F25b Sharp Edges Sand Sand Sharp Edges I1 I2 Thin CA Repeat for M3 M4 and M5 M1 M2 M3 Align M2 ...

Page 18: ...plug wire 40 Position the engine cylinder centered over M2 and M3 of the engine block with M6 the thickest balsa part lower most Bond the cylinder to the engine block by wicking thin CA around the base Set the completed faux motor aside until the Final Assembly Head Rest 41 Locate two parts H1 and two parts H2 Align the edges of the two H1 s together with the etched sides facing out The arrow indi...

Page 19: ...ns 2013 Stevens AeroModel all rights reserved Page 19 Step 37 Step 38 Step 39 Step 40 Step 44 Step 43 Step 42 Step 41 M4 M5 Gap Align H1 Bottom F r o n t 5 8 in H2 Bottom F r o n t M6 M16 Top View F r o n t Bottom Front 1 8 in extension or trim flush ...

Page 20: ...assembly stages This wing assembly is intentionally built with a twist or wash out follow these instructions carefully to build the wing pannels correctly Following anything other then the carefully outlined instructions here could result in an improperly washed out wing 49 Start with the right wing panel Fit and bond together parts W1a R and W1b R to form the W1 R wing panel Lay the panel on the ...

Page 21: ...ghts reserved Page 21 Step 45 Step 46 Step 47 Step 48 Step 52 Step 50 Step 49 H E1 E2 E2 Leading Edge Control Horn Slots W1a R W1b R 45 Deg Bottom Top W2 End View V R L e a d i n g E d g e Rudder Horn Slot Top Bottom W3 W4 W5 W6 Step 51 Top View 45 Deg Left Right W3 W4 W5 W6 Weight ...

Page 22: ...hat there are no gaps between the wing panel and the leading edge 55 Hold the wing panel at the root and examine it from the rear Hold the wing so that the leading and trailing edges are in line with each other at the wing root You should see a pronounced twist to the wing raising the trailing edge about 1 4 in higher than the leading edge at the wing tip If the twist is absent or incorrect lightl...

Page 23: ...del all rights reserved Page 23 Tack Glue 1 4 in sq Leading Edge Stock Step 53 Rear View Step 54 Step 54 Cont Step 55 Step 57 Step 56 Cont Step 56 Step 55 Cont Shim 1 4 in W6 No Gaps No Gaps W5 Level 1 4 in Tip Root Sight trim sand REMOVE REMOVE Remove standoffs Root Tip ...

Page 24: ...model I painted the underside of the wings to match the covering that I will be using on the top This makes the framework under the wing virtually disappear in flight I also painted the spar to match the wing The engine instrument panel and the front of the headrest I painted black I painted the top portion of the engine cylinder silver for a little contrast and the back side of the instrument pan...

Page 25: ...ructions microMAX 103 Build Instructions 2013 Stevens AeroModel all rights reserved Page 25 Step 58 Step 59 Step 60 Step 62 Step 61 Cont Step 61 Step 60 Cont Leave Bottom Uncovered S1 Bond Sand Sand Step 58 Cont ...

Page 26: ...ide of former F4 through the left hole in former F19 and out of the exit slot on the left fuselage side Slit the covering near the end of the slot to allow the pushrod to pass through 65 Install the receiver by first catching the rear edge of the circuit board in the notch in the short arm at the rear of the receiver clip Gently pull back on the long arm and while supporting the balsa radio tray p...

Page 27: ... Instructions 2013 Stevens AeroModel all rights reserved Page 27 Step 63 Step 64 Step 64 Cont Step 64 Cont Step 67 Cont Step 67 Step 66 Step 65 up Outer Right Inner Left right side left side 3 in extension SAUMEXT 3 fuselage top right left ...

Page 28: ...tioned with the bevelled left side of the leading edge down against the table Apply the tape to the right side of the rudder stabilizer 73 Slit the covering over the control horn slot on the right side of the rudder Fit and bond the short R2 control horn on the right side of the rudder with medium CA 74 Remove the covering over all six slots in the center of the bottom of the horizontal stabilizer...

Page 29: ... all rights reserved Page 29 Step 68 Step 69 Step 70 Step 75 Step 74 Step 73 Step 72 Step 71 Bottom View bevelled edge lower left side of elevator E2 tape leading edge bevelled side down tape leading edge bevelled side down right side of rudder E3 R2 perpendicular 90 degrees ...

Page 30: ...nstrument panel and the top of F16 Hold the wind screen in place by applying tiny drops of medium CA in a few places along the seam between the wind screen and the top of the fuselage Only use enough glue to hold the wind screen in place Too much glue may fog the wind screen in an unsightly manner when it cures 81 Fit the tabs on the bottom of the faux motor into the recesses on either side of the...

Page 31: ...ructions microMAX 103 Build Instructions 2013 Stevens AeroModel all rights reserved Page 31 Step 76 Step 77 Step 78 Step 79 Step 83 Step 82 Step 81 Step 80 5 8 in bend to retain wheel bend 1 32 wire to match plan ...

Page 32: ...eceive the tabs at the root edge of the wing panel Now with the model inverted fit the right wing panel to the plywood spar on the right side of the fuselage The plywood spar should slide through the slot between rib W3 and the balsa wing spar of the right wing panel The spar will extend beyond the rib about 1 8 in Do not bond 89 Now fit the tabs along the right wing root into the receiving slots ...

Page 33: ...X 103 Build Instructions 2013 Stevens AeroModel all rights reserved Page 33 Step 84 Step 85 Step 86 Step 87 Step 91 Step 90 Step 89 Step 88 LG1 LG2 LG2 LG3 Bond Bond Tack Glue TW W3 Bottom View Bottom View Bond Bond V e l c r o ...

Page 34: ...avoiding disaster While not an exhaustive pre flight check these are some of the major items that you should consider using when developing your own pre flight check list Get in the habit of always pre flighting your models before each and every flight Weight and Balance Check the microMAX s balance The model should balance on the mark etched to the bottom of the right and left wing tips Use your ...

Page 35: ...ble airplane When built straight and trimmed for level flight it should readily return to wings level from any attitude The model is exceptionally draggy and when combine with the light wing loading produces less of a power off glide and more of a power off descent Keep the power on when setting up your approach Should you loose power due to low battery and enter glide mode keep the nose down to r...

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