Stevens Aero Model microMAX 103 Manual

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
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 1

WARRANTY
Stevens AeroModel guarantees this kit to be free from defects in both material and workmanship at the
date of purchase. This warranty does not cover any component parts damaged by use or modification.
In no case shall Stevens AeroModel’s liability exceed the original cost of the purchased kit. Further,
Stevens AeroModel reserves the right to change or modify this warranty without notice.
LIABILITY RELEASE
In that Stevens AeroModel has no control over the final assembly or material used for final assembly,
no liability shall be assumed nor accepted for any damage resulting from use by the user. By the act of
using the user-assembled product, the user accepts all resulting liability.
If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is
advised to return this 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 system and supporting electronics as outlined within this product manual. Product support
cannot be provided, nor can Stevens AeroModel assist in determining the suitability or use of
electronics, hardware, or power systems not explicitly recommended by Stevens AeroModel.
For product assembly support, replacement parts, hardware, and electronics to complete this model,
please contact Stevens AeroModel at www.stevensaero.com.
Stevens AeroModel
26405 Judge Orr Rd., Colorado Springs, CO 80808 USA
719-387-4187 www.stevensaero.com
Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 2

Kit Inventory
☐Laser Cut Wood (7 Sheets See “Laser Cut Parts Inventory”)
☐2 - 1/4 in. sq. x 12” Balsa Leading Edge Stock
☐Photo-Illustrated Build Instructions
☐Computer Drawn Detail Pages (2 Pages 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

Suggested Items To Complete This Model
Many of the following items will be available at your local hobby shop. For your convenience Stevens
AeroModel stocks all of the power system components and most of the required and optional building
supplies. If you have difficulties sourcing any of the requisite items locally, please visit our web site to
purchase those items necessary to complete your model.
Required Electronics (Available at StevensAero.com)
☐Transmitter with at least 3 channels
☐Receiver/ESC/Servo Brick [PKZ3351, PKZ3352, or PKZUA1151]*
☐Motor/Gearbox [PKZ3624]
☐130mm x 70mm Propellor [EFL9051]
☐120-160 mAh 3.7V LiPo battery.
☐3 in. battery lead extension [SAUMEXT/3]
*SPMAR6400 or SPMAR6410 may be used with computer radio and mix.
Covering Film Requirements
While any high quality model film may be used to finish this model. Superior results will be achieved
using genuine AeroLITE brand model airplane covering film. The lower working temperature and superior
light weight of AeroLITE are especially desirable for this style of model airplane. AeroLITE is 1/3 the
weight of the typical model airplane covering film and will represent a weight savings over competing films
when applied to this model.
☐1 - Patch Pak AeroLITE (bright white)
☐1 - Patch Pack AeroLITE 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 compatible lacquer based spray paint. Below are our suggestions, feel
free to use your preferred product.
☐DEFT clear lacquer based sealant (available at most hardware stores).
☐Design Master Color Tool lacquer based spray paint (available at most art supply stores).
Required Building Supplies and Tools
☐1/4 oz. Medium CA Glue (PAAPT04)
☐1/4 oz. Thin CA Glue (PAAPT10)
☐CA glue applicator tips (PAAPT21)
☐CA glue accelerator (PAAPT15)
☐Hobby Knife with ample supply of #11 blades
☐Sanding block with 400 and 600 grit paper
☐Heat Gun and Covering Iron
☐Small Needle Nose Pliers
☐1/2 in. wide clear tape (DUB916)
☐Velcro for Battery Mounting (PKZ1039)
☐Masking Tape (Low tack blue painters tape)
☐AeroLite Covering Film (1-2 Patch Packs)
Optional Building Supplies and Tools
☐Balsa Filler (HCAR3401)
☐Modeling Clay for Ballast
☐CA glue de-bonder (PAAPT16)
☐Masking Tape (Low tack blue painters tape)
☐Clear Lacquer based sealant (DEFT)
☐Lacquer based spray paint (Design Master)
☐1-1/2 in. Du-Bro Wheels [DUB150MW]
Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 4

Sheet Wood Inventory (1 of 1)
Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 5

Builders Notes
Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 6

General Assembly Instructions
Thank you, for purchasing this Stevens microMAX 103.This product has been developed and
manufactured using state of the art CAD/CAM systems and features a unique interlocking construction
process that, when compared to traditional methods found in other model aircraft kits, save countless
hours of measuring, cutting, sanding, and fitting. We are certain that you’ll find our kit to offer a truly
exceptional build experience. As this kit is recommended for the novice model builder and pilot; we invite
beginners who have purchased this kit to seek the help of a seasoned builder and pilot. At any time
should one run across a term or technique that is foreign please don’t hesitate to contact our staff with
your questions.
READ THIS!
Please READ and RE-READ these instructions along with any other included documentation prior to
starting your build and/or contacting our staff for builder support.
Pre-sanding
Do not skip this step. Prior to removing any parts from the laser cut sheet wood use a sanding block
loaded with 250-400 grit paper and lightly sand the back side of each sheet of wood. This step removes
any residue produced as a result of the laser cutting process and, as we have found that most stock wood
sizes run several thousandths of an inch over sized, slightly reduces the thickness of each sheet.
Leave your pre-sanded parts in the sheet until required in the assembly process.
Protecting your worktable
If your kit shipped in a clear poly tube, use the tube as a non-stick barrier between your worktable and the
product assembly. In a pinch plastic food wrap or waxed paper will suffice.
Bonding the assembly
As this product 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 assembly
square. Once you arrive at the end of a major assembly sequence square your work on top of a flat
building table and revisit the dry fit joints with glue. Using the dry-fit process you’ll be able to recover from
a minor build mistake and will ultimately end up with a more square and true assembly.
Unless otherwise noted in the instructions we find it easier to tack glue part (temporarily bonding parts in
assembly using a small dot of glue) using medium CA glue applied with a fine-tip CA glue applicator tip.
Tight fitting joints should be bonded using thin CA glue applied, sparingly, with a CA glue applicator tip.
Never force the fit!
Remember this is a precision cut kit our machines cut to within 5 thousandth of an inch in accuracy. Yet
the wood stock supplied by the mill may vary in thickness by up to 20 thousandths. This variance in the
wood stock can cause some tabs/notches to fit very tight. With this in mind, consider lightly sanding, or
lightly pinching, a tight fitting tab rather than crushing and forcing your parts together. You’ll break fewer
parts in assembly and will end up with a more square and true airframe.
Manual Updates
Please check our web-site for updates to these instructions prior to commencing the build.
To obtain downloads and updates relative to this model aircraft kit, please visit the corresponding product
page at StevensAero.com
Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 7

Fuselage
Fuselage parts are designated with a “F” followed by a numeric. Parts have been numbered so that the
fuselage assembly and required parts follows in numeric order from F1 to F25.
The fuselage is of traditional sheet side with central crutch assembly. Many of the formers will need to be
installed in a forward and top/bottom orientation. Unless otherwise specified, formers should be installed
with the etched part number facing the front of the assembly and any top or bottom designations followed.
You will dry fit the majority of this fuselage assembly together only gluing at the final instructional steps.
When parts cannot easily be retained with friction, use a single tiny drop of medium CA glue applied
sparingly through a CA glue applicator tip to “tack glue” the part in place. Should you commit an error in
assembly it will be easier to recover from the mistake and remove or correct the part fit in error if you do
not slather the assembly in glue after each step! Further, this method of assembly will allow our
interlocking design to do it’s job as each successive part installed within the fuselage will help pull the
entire structure square and true.
Build the Central Crutch
1. Lay part F2 on the table with the etched side marked “top” facing up. Sandwich the nylon
Receiver Clip between ply part F1 and balsa 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 crutch assembly. The tabs on parts F2, F3,
and F4 must extend beyond F5 as they will later engage the fuselage sides
5. In the same manner as step 4 above: Fit doubler F6 to the right side of the central crutch
assembly. Ensure that all parts fit snugly together with no gaps. square the assembly on a
flat surface and bond with CA glue.
Assemble the Fuselage Sides and Landing Gear Pocket
6. Test fit the fuselage side F7 to the right side of the fuselage to cover F6. F7 should engage
the tabs on parts F2, F3, and F4. Once satisfied with the fit, remove F7 and coat surfaces
to be bonded (between F7 and F6) with a thin layer of slow set (medium or thick) CA glue.
Return F7 to assembly this time allowing the glue to bond the parts together.
7. Turn the assembly up side down on the table. Fit ply part F8 through the notch in F5, then
push it into the notch and slot in F6/F7. These notches and slots are oversized to
accommodate all three parts of the landing gear pocket. Part F8 must occupy the forward
portion of these openings. Do not bond.
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Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel 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
front
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

Fuselage Continued
8. In the same manner, fit ply part F9 behind F8. Do not bond.
9. Fit ply par F10 behind F9 to complete the landing gear pocket. Do not bond.
10. Test fit the fuselage side F11 to the left side of the fuselage to cover F5, engaging the tabs
on parts F2, F3, and F4. Once satisfied with the fit, remove F11 and coat surfaces to be
bonded (between F11 and F5) with a thin layer of slow set (medium or thick) CA glue.
Return F11 to assembly this time allowing the glue to bond the parts together. Ensure that
no glue enters the landing gear pocket itself!
Motor Mount
11. Lay ply part F12 on the table with the etched side marked “bottom” facing up. (This is
critical, as the orientation of F12 will determine the correct amount of offset - or ‘right thrust -
of the motor needed for proper flight.) Fit and tack glue ply parts F13 and F14 to F12.
Ensure that F13 and F14 are fitted to the side of F12 marked ”bottom”.
12. Fit and tack glue balsa part F15 to the tabs on F13 and F14. Ensure that the side of F15
marked “bottom” is facing up.
13. Turn the assembly right-side-up, with F12 on top, 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 properly. NOTHING is worse than gluing a bad motor in your model only to have to
cut into your finished product and replace the defect. Additionally, no replacement support can
be provided for a DOA motor if you’ve modified and glued the motor within your model.
TEST YOUR MOTOR AND RECEIVER NOW! then proceed with your build using ONLY a known
good motor.
It is exceedingly important that you are careful NOT to allow glue on the gear train or within the
motor. When working with glue around the motor use extreme caution and ALWAYS use fine
tipped glue tips [PAAPT21] fit to the nozzle on your glue bottle. Bonding your gears, rendering
them inoperable, will indeed ruin your day!
14. Now, snap off the four mounting spikes on the tabs of the motor [PKZ3624], and sand the
tabs smooth.
Build Instructions
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Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel 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

Fuselage Continued
15. Feed the motor lead through F15 of the motor mount assembly and then through the
opening in former F3.
16. Pass the motor lead under and back up through F2 to enter the cockpit on the left side of
the aircraft.
17. Fit the motor within the cut out at F12, ensuring that it is seated all the way back and
generally centered within the cuts. Note: A properly installed motor and F12 part should
result in a motor mounted with apparent right thrust angle. Bond the motor to F12 with a
drop of glue under the tabs on each side of the motor. Tip: Generally, the motor will last the
life of the model and should 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 F17
to F16, F3, and the fuselage sides with CA glue. At this time bond F16 to F12 with CA
glue.
Rear Fuselage
20. Fit the fuselage rear decking F18 to the tabs along the top of former F4, resting on the
fuselage sides just behind F4. Tack glue F18 to F4, and the first 1/4 in. of the fuselage
sides immediately behind F4.
Build Instructions
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Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights 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

Fuselage Continued
21. Turn the fuselage up-side-down. Fit and tack glue former F19 to the underside of F18,
engaging the tabs along the top of F19 with the slots mid-way back on F18.
22. Bring the fuselage sides together, engaging the tabs along the top edge of the fuselage
sides with the notches along the edges of F18, and the tabs on the side of F19 with the
slots in the fuselage side. Tack glue F18 and F19 to the fuselage sides. Do not final bond
at this time.
23. Assembly the fuselage bottom F20 from parts F20a and F20b, and bond with thin CA.
Note: The large balsa knock-out in F20a may remain within the part and can later be
removed for additional access beneath the radio compartment (For example, to provide an
area of alternate mounting for the battery).
24. Fit F20 to the bottom of the fuselage, engaging the tabs on F20 with the notches along the
bottom edge of the fuselage sides, tack glueing as you go. The forward end of F20 will rest
on F10 of the landing gear pocket, but will not cover the slot. Ensure that no glue enters the
slot.
25. View the fuselage from the rear and check for twists. If a twist is detected, hold the
fuselage at F4 and gently twist it in the opposite direction until it is straight. Don’t be
concerned if the tack glued spots “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 to the opening in former F3, aligning the inner cut-out with the
etched marks on part F15. Wick thin CA around the edges of F22, bonding it to F15 and
former F3.
28. Fit part F23 to the opening, aligning the inner edges of the cutout with that in F22. F23 is
slightly shorter than F22, and the outer front edges will not align. Wick CA between parts
and around the edges to bond. Tip: part F22 and F23 feature two 1/8 in. alignment holes to
assist with location of the part. Use a scrap 1/8 in. dowel or drill bit(s) as alignment jigs
through the holes int the parts.
29. Lay part F24 over F23, aligning the inner edges of the cut-out with that of F23. Again, F24
is slightly shorter than F23, and the outer front edges will not align. Wick CA between parts
and around the edges to bond. Tip: part F23 and F24 feature two 1/8 in. alignment holes to
assist with location of the part. Use a scrap 1/8 in. dowel or drill bit(s) as alignment jigs
through the holes int the parts.
Build Instructions
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Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all 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

Fuselage Continued
30. Assemble the cowl sheeting from parts F25a and F25b, and bond with thin CA. Moisten
one side of F25 with glass cleaner and allow to soak in for a minute or two. This will render
F25 much more flexible, making it easier to wrap it around the curves of the nose.
31. Fit F25 to the tab at the front of F15, dry side towards fuselage, and wrap it around the
nose, engaging the tabs on the sides of F17 with the notches in F25. Hold F25 in place
with a low-tack masking tape until F25 is completely dry. (If you are in a hurry now is a
good time to skip ahead and build the motor parts, headrest, and/or wing assembly).
32. When F25 is completely dry, remove the masking tape and use a slow set CA glue to bond
F25 in position. Ensure that the bottom edge of F25 contacts the nose block at all points.
33. Sand the bottom of the nose block to flow smoothly upwards toward the nose, as shown in
the photographs. Leave the edges of the nose block sharp all the way around the bottom.
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, and M5. The parts are delicate, and require
hardening with thin CA glue as well as careful handling. To harden the parts, apply a small
drop of thin CA at the top of each piece and allow it to wick in and cure. This will strengthen
the center of the pieces and help prevent them from breaking, however, they are still
delicate, and must be handled very carefully.
36. Lay parts M2 and M3 (these will have a slight flat at the top of each piece) on the table, up
side down. Fit ply part M1 to the slots in M2 and M3, trapping them in the recess in M1.
Align M2 and M3 so that their sides are flush with each other. Ensure that M1 is fully
seated in the slots, and bond with tiny drops of thin CA.
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Build Instructions
microMAX 103 Build 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

Fuselage Continued
37. Turn the assembly right-side-up on the table. Fit parts M4 and M5 to each end of M1. Note
that these parts are slightly shorter than M2 and M3, so there will be a 1/20 in. gap between
the bottom of these parts and the table top. Align the side of M4 and M5 with those of M2
and M3, and bond with thin CA. Set the completed engine block aside for now.
38. Assemble the engine cylinder. Cut a 3/4 in length from the 1/16 in. diameter aluminum tube
supplied in your kit.
39. Locate balsa parts M6, M8, M10, M12, M14, and M16, and ply parts M7, M9, M11, M13,
and M15. Slide these parts, beginning with M6 flush with one end of the tubing, in order
from M6 through M16 onto the aluminum tube. Wick small drops of thin CA between the
parts to bond them together and to the aluminum tube. Finish the assembly with 1/8 in. of
tubing protruding above M16 giving the impression of a spark plug. Later you can add heat
shrink tubing to the “plug” to give the effect of a 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 indicates the front of the head rest, and is located along
the bottom edge of each part. Bond parts H1 together using a slow set CA glue.
42. Place one H2 part on right and left side of the combined H1 parts, aligning the top, bottom,
and front edges with each other. Bond parts to form the headrest assembly using a slow
set CA glue.
43. Sand the assembly sides, tapering the head rest to a point at the rear as viewed from
above.
44. Sand the headrest to and elliptical shape as viewed from the front. Take your time, and
sand this shape all the way to the rear of the head rest. Set the completed head rest aside
until the “Final Assembly” steps outlined in this manual.
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Build Instructions
microMAX 103 Build Instructions. © 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
Front
5/8 in.
H2
Bottom
Front
M6
M16
Top View
Front
Bottom
Front
1/8 in. extension
or trim flush

Fuselage Continued
Tail Surfaces
45. Gather together the horizontal stabilizer H, and the elevator parts E1 and two E2’s. Lightly
sand the parts in preparation for covering/painting. Do not assemble the elevator parts at
this time. Examine the elevator E1 and note the location of the control horn slots. These
are located nearest to the leading edge of the elevator.
46. Follow the tape hinge instructions given on the plan page for the elevator and sand a 45
degree bevel along the leading edge of the part. The bevelled edge will become the bottom
side of the elevator.
47. Locate the vertical stabilizer V, and the rudder R1. Lightly sand these parts in preparation
for covering/painting. Examine the rudder R1 and note the location of the rudder horn slot.
This slot is positioned nearest to the leading edge and bottom of the rudder.
48. Follow the tape hinge instructions given on the plan page for the rudder and sand a 45
degree bevel along the left side of the leading edge of the part. Set the finished tail
surfaces aside until the Final Assembly.
Wing Assembly
Wing parts are designated with a “W” followed by a numeric. Parts have been numbered so that the wing
assembly and required parts follows in numeric order from W1 to W6. Most of the assembly will be lightly
tack glued together, final bonding taking place during the final 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 table with the etched side facing up. Refer to the
plan on the detail sheet, and ensure that you are indeed working with the right side wing
panel.
50. Fit the balsa spar cap W2 to the notches in W1(R) as shown and bond with CA glue.
51. Fit ribs W3, W4, W5, and W6 to the trailing edge of the wing panel at provided tab and
notch locations. Refer to the plan on the detail sheet for proper location of the ribs. Note:
the tabs on each rib are sized specifically to fit in the slots in their correct location. If the rib
doesn’t fit, it’s likely in the wrong place. Tack glue the ribs, at the trailing edge tab/notch
point only, with a small drop of medium CA glue.
52. Turn the wing over on the table. Hold the trailing edge at the wing root down on the table
with a small weight or a piece of low-tack masking tape. Bend the wing panel over the ribs,
engaging the front of the ribs with the notches along the inner portion of the leading edge.
Ensure that the spar fits into the recesses in each rib. Bond the ribs to the wing panel with
thin CA.
Build Instructions
microMAX 103 Build Instructions. © 2013 Stevens AeroModel all rights reserved.!Page 20
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