Evolution ENIGMA User manual

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ELECTRIC and GLOW VERSION
Evolution Models Kits Include:
Recommended Setup
Precision Laser Cut Balsa, Ply and Depron
35-46 cu. in. Glow or Electric Equivalent
High Quality Comprehensive Hardware Pack
Four Micro Servos (JP Supatec MG 2BB) + Throttle
All Sheet and Strip Wood
Comprehensive Step by Step Instruction Manual
V2

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Introduction
The Enigma is a lightweight highly manoeuvrable model designed for the sport flyer or aerobatic pilot. The
airframe is strong and robust, but lightweight enough to perform any manoeuvre you desire with precision
and ease. We know you will not be disappointed with the performance of the Enigma and we also hope that
we have also designed a model that is simple and satisfying to construct.
If you wish to give us any feed back please do so at [e-mail]
We hope you enjoy the Enigma as much as we have here at Evolution Models.
Building Recommendations
Check all parts from the box to ensure that they are present; if not then please contact us at the e-mail
address at the back of the instructions. We do, from time to time, make mistakes!!
Ensure that you use a completely flat base on which to build the model, this should be large enough the build
the wing 50” (1270mm) x 16” (400mm) as a minimum.
Read through the instructions before starting to build, understand each step before applying glue. Take your
time building the model, building a straight and strong model will ensure it will fly well! We know the
instruction booklet is large, but it is mainly pictures and illustrations to provide clear concise construction
steps.
The glue detailed in the instructions is for guidance only; this is what we used for the prototypes. It is at the
builder discretion which glue is used, but ensure that it is suitable for the intended purpose. Always read the
application instructions to ensure you achieve a strong joint. Depron is a foam material, standard Cyano will
attack and melt it, always use foam safe glue. Aliphatic Wood Glue is recommended if the joint may require
sanding. Aliphatic white wood glue sands at the same rate as the balsa and therefore will not leave any glue
lines.
Once you have removed the laser cut part from their sheets keep the remaining sheets, some of this will be
used throughout the build process.
Balsa is a hardwood and therefore a mask should always be worn when any sanding is required.
Make sure the mask provides suitable protection from hardwood or airborne dusts. We also suggest
you sand outside in free air away from anyone else.
This radio controlled model is not a toy. It can cause serious injury to the operator, public and property if
misused or abused. Ensure that you carefully read all the instructions supplied with this kit and instructions
provided with the engine and radio control system or any other components purchased separately. Also
make sure that any parts bought separately are suitable for their application.
This kit contains small and potentially sharp parts, keep away from children.
Additional Materials Required
Recommended Tools
Uhu Por
Foam Safe Cyano
Standard Thin or Medium Cyano
Aliphatic Wood Glue
Epoxy Resin
Tinned Copper Wire (For Undercarriage)
Solder
Heat Shrink Covering Material
Engine and Mount (ESC for electric variations)
Radio Gear
Modelling Knife
Razor Plane
Set Square
Sand Paper
Sanding Block
Blow Torch
Drill and Drill Bits
Pop Rivet Gun
Building Board – Completely flat 1300 x 400mm Min
Bradawl

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Enigma Part List
Wood Pack
Sheet Metric (mm)
Sheet Imperial (in)
Quantity
Description
1220 x 75 x 1.5
48 x 3 x 1/16
2
Leading Edge Sheeting
1220 x 18 x 1.5
48 x 6/8 x 1/16
4
Trailing Edge Sheeting
915 x 100 x 1.5
36 x 4 x 1/16
1
Webbing
915 x 100 x 1.5
36 x 3 x 1/16
1
Wing Centre Sheeting
915 x 75 x 3
36 x 3 x 1/8
1
Bottom, Top Deck Sheeting and Wing Tips
Strip Metric (mm)
Strip Imperial (in)
Quantity
Description
1220 x 25 x 6
48 x 1 x ¼
1
Leading Edge
1220 x 9.5 x 6
48 x 3/8 x ¼
2
Main Spars
1220 x 6 x 6
48 x 1/4 x ¼
1
Trailing Edge Spar
915 x 9.5 x 6
36 x 3/8 x ¼
2
Tail plane, Rudder, Elevator Strip
915 x 6 x 1.5
36 x 1/4 x 1/16
5
Wing Capping
500 x 6
36 x ¼ Dowel
1
Elevator Pushrod
Hardware Pack
1
Tail Wheel Assembly
1
6
2" Wheels
2
Horns
5
Wing Bolt
2
Horn Backs
3
Captive Nut
2
Horn Bolts
8
7
Dowels (110mm)
1
2
Horn Nuts
8
9
Mylar (20cm)
1
Closed Loop Wire
1.8m
Metal Clevis
6
Hatch Latch Magnets
2
Plastic Snap Link
2
10
Washers
2
CL Adaptors
2
Crimps
4
11
Hatch Mount 1/4 x 1/4 Spruce
1
3
CL Lock Nuts (M2)
6
Tank
1
4
Threaded Rods
4
Bowden (300mm)
1
Nipple Links
1
Saddle Clamps
4
12
Glow
Only
Fuel Tube (300mm)
1
Screws 6 x 3/8
8
5
10swg Wheel Collets
2
13
Stickers
2

3
Laser Cut Parts
2
1
3
4
5
5
3
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
21
23
24
25
27
26
26
28
29
30
31
32
33
34
35
36
37
38
39
40
41
43
42
44
45
46
47

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Part No.
Description
Quantity
Sheet Size
1
Tailplane / Fin Support
2
3mm (1/8") Balsa
2
Left and Right Upper Fuselage Sides
2
3mm (1/8") Balsa
3
Left and Right Lower Fuselage Sides
2
3mm (1/8") Balsa
4
Wing Centre Web
1
3mm (1/8") Balsa
5
Wing Doublers
2
3mm (1/8") Balsa
6
Fin Rear Section
1
6mm (1/4") Balsa
7
Fin Centre Section
1
6mm (1/4") Balsa
8
Upper Backbone
1
6mm (1/4") Balsa
9
Lower Backbone
1
6mm (1/4") Balsa
10
Rudder Base
1
6mm (1/4") Balsa
11
Fin Front Section
1
6mm (1/4") Balsa
12
Rudder Trailing Edge
1
6mm (1/4") Balsa
13
Rudder top
1
6mm (1/4") Balsa
14
Rudder Leading Edge
1
6mm (1/4") Balsa
15
Tailplane Leading Edge
1
6mm (1/4") Balsa
16
Elevator Trailing Edge
2
6mm (1/4") Balsa
17
Elevator Inner Tips
2
6mm (1/4") Balsa
18
Tailplane Centre Section
1
6mm (1/4") Balsa
19
Tailplane Trailing Edge
2
6mm (1/4") Balsa
20
Elevator Leading Edge
1
6mm (1/4") Balsa
21
Elevator Outer Tips
2
6mm (1/4") Balsa
22
Tailplane Tips
2
6mm (1/4") Balsa
23
Fuselage Top
1
6mm (1/4") Balsa
24
Wing Tips
2
6mm (1/4") Balsa
25
Fuselage Bottom Front Section
1
6mm (1/4") Balsa
26
Aileron Tips
2
6mm (1/4") Balsa
27
Ailerons
2
6mm (1/4") Balsa
28
Upper Fuselage Sides
2
3mm (1/8") Balsa
29
U/C Inner Plate
1
3mm (1/8”) Ply
30
U/C Outer Plate
1
3mm (1/8”) Ply
31
Aileron Servo Mounts
2
3mm (1/8”) Ply
32
Wing Mounting Plate (Fuselage)
1
3mm (1/8”) Ply
33
Tail Skid Inner
1
3mm (1/8”) Ply
34
F3
1
3mm (1/8”) Ply
35
Tail Skid Outer
1
3mm (1/8”) Ply
36
Battery Mounting Plate
1
3mm (1/8”) Ply
37
F4
1
3mm (1/8”) Ply
38
Wing Mounting Plate (Wing)
1
3mm (1/8”) Ply
39
F1
1
3mm (1/8”) Ply
40
F2
1
3mm (1/8”) Ply
41
Hatch Magnet Bracket
2
3mm (1/8”) Ply
42
Control Exit Doublers
3
1mm (1/32”) Ply
43
Fuselage Doublers
2
1mm (1/32”) Ply
44
U/C Front Leg
1
3.5mm (10swg) Wire
45
U/C Rear Leg
1
3.5mm (10swg) Wire
46
Elevator Joiner
1
3.5mm (10swg) Wire
47
U/C Strengtheners
2
3.5mm (10swg) Wire

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Building Instructions
FIN AND RUDDER
Take the three parts that form the fin (Parts 6, 7 and 11), trial fit before gluing together. The bottom of the fin
will be trimmed down later to match the rudder height in final assembly.
Remove the four pre-cut parts (Parts 10, 12, 13 and 14) of the rudder from the cutting sheets; trial fit the
parts before gluing together using white wood glue. Ensure that the leading edge, top and bottom rails are at
90° then add the trailing edge.
Take the supplied strip of 9mm (3/8”) x 6mm (1/4”) and cut to length to form the four centre rails. Mark a
centre line on the leading edge and chamfer to a 45° angle with a razor plane to make the pivot point into
which the hinges will be inserted.
With a sharp knife cut the slots for three hinges 15mm (5/8”) from the top and bottom. Cut 10mm (3/8”)
strips from the supplied Mylar hinge material and insert into the hinge slots; 50% in the rudder and 50% into
the fin. Ensure that you get at least 45° free movement either way.
Do not glue the hinges in at this stage! Sand all parts to a smooth finish and round off the leading edge of
the fin ready for covering.
TAIL PLANE
Take the five laser cut parts (Parts 15, 18, 19 and 22(2)) and trial fit. Ensure the tips are at 90° to the leading
and trailing edge before gluing with white wood glue.

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With the supplied strip of 9mm (3/8”) x 6mm (1/4”) cut to length to form the eight centre rails, glue in place
with white wood glue.
Take the eight pre-cut parts (Parts 16(2), 17(2), 20(20), 21(2)) which form the elevators, trial fit, ensure the
tips are at 90° to the leading and trailing edge before gluing. With a supplied strip of 9mm (3/8”) x 6mm (1/4”)
cut to length to form the six centre rails, glue in place with white wood glue.
Mark the centre line of the leading edge with a pencil and chamfer either side to a 45° angle with a razor
plane to make the pivot point into which the hinges will be inserted. Mark the centre of the trailing edge and
carefully chamfer the elevator to a 1mm point from the leading edge.
With a sharp knife cut 2 slots in each elevator to accept the hinges, ensure that the elevator sits centrally on
the tail plane. Cut 10mm (3/8”) strips from the supplied Mylar hinge material and insert into the hinge slots,
50% in the elevator and 50% into the tail plane. Ensure that you get at least 45° free movement either way
as the rudder is set out above.
With the elevators hinged to the tail plane place the joiner (Part) centrally on the elevator and mark its
position, cut the leading edge off up to the outer mark to allow the joiner to be recessed into the elevator and
drill a hole centrally into the elevator. Make the hole slightly larger than the coupler for adjustment later.

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Do not glue the hinges or coupler in at this stage. Sand all parts to a smooth finish and round off the
leading edge of the tail plane ready for covering.
FUSELAGE
At this point the decision needs to be made whether the glow or electric version is being made. If the
glow version is your choice then the balsa nose section and ply doubler need to be cut as shown
below. Carefully cut these sections off with a straight edge and sharp knife.
Lay the upper and lower main fuselage sides (Parts 2(2) and 3(2)) on the work bench ensuring that you have
a left and right hand side. Make sure there is a good glue joint between these sections; if required lightly
sand the mating edges to achieve this. Once satisfied these sections are properly aligned glue together and
add the 1mm (1/32”) ply doubler (Part 43 (2)) with a thin layer of white wood glue. Make sure the entire
doubler has glue on it and weigh down to allow dry. Glue the control exit doublers (Part 42 (3)) to the rear of
the fuselage.
Glue F2, F3, and the wing seat doublers (Parts 40, 34 and 5) in place as indicated by the cut outs marks on
the ply doubler. Use a set square to ensure they are 90° to the fuselage sides. Glue the three control exit
doublers (Part 42(3)) to the rear of the fuselage.

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Add the second fuselage side, lining the Formers up with the cut outs. Use a set square to check that the
fuselage sides are parallel on all sides, make minor adjustments if necessary. Make time to get this right,
if the sides are not parallel the model will be out of square.
With a scrap piece of 6mm (1/4”) balsa sheet, cut a 6mm (1/4”) post for the rear section of the fuselage. Glue
the fin and tail plane plates (Parts 1(2)), Former F4 (Part 37) to one side of the fuselage. Once dry, pull the
fuselage sides together; the fin and tail plane plates should fit into the corresponding slots. Make sure that
the sides are pulled in equally and the sides are parallel. If necessary draw a line on you work bench to
ensure the sides are pulled into a centre line . Take time to get this right or the fuselage will be out of
alignment. Once satisfied, glue in position. Former F4 should be fitted on the notches on the fuselage
sides.
Take the upper and lower backbone (Parts 8 and 9), line up the front edge of the upper piece 12.5mm (1/2”)
back from the front edge of the lower piece and glue in place. Allow to dry before moving onto the next
stage. Mark a line with a pencil from the bottom of the lower backbone through the bottom of the upper
backbone as shown in the right-hand picture below, carefully cut this section off.
Mark the point at the top of the front slope 6mm (1/4”) in from either edge and draw guide lines down to the
rear of the backbone and front section. The lines on top taper out to the rear of the backbone (at the rear of

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the fin slot). With a razor plane and sandpaper, shape the backbone to these guide lines as shown in the
picture on the right of the next page.
Place the backbone with the front sloping edge on F3 and gradually sand the rear section until it touches F4
as shown in the diagram below. Test fit the upper fuselage sides (Part 28(2)) and when satisfied glue the
backbone in place.
With sandpaper and block or a razor plane, gently run along the bottom of the upper fuselage sides to create
a bevel which will provide a better fit where they join the fuselage. See the diagram above. Once satisfied
glue in place using aliphatic wood glue to make sanding easier later.
Epoxy the two F1 Former pieces together (Parts 39), these are the correct size for the glow version. If
building the electric version cut F1 down so that it measures 67mm x 50mm. Drill the centre of F1 if building
the glow version to create a 15mm dia. Hole to allow the fuel tubing to exit the tank bay. If building the
electric version place the battery retaining plate (Part 36) in its locating lugs before gluing in position with F1
using epoxy resin. Use clamps or elastic bands to hold the fuselage sides together and protect the sides
using scrap balsa.