1973 Winnebago Chieftain Motorhome - Inter-Action Hobbies...glazing 10A to the inside of the oven...

www.interactionhobbies.com

High quality HO scale vehicle: 1.1” wide by Ÿ3.85” long by 1.5” high

Assembly requiredŸPaint, glue, and hobby tools required for Ÿassembly are not included

WARNING: CHOKING HAZARD - Small and sharp partsNot for young children

Kit: HO-7511© 2019Inter-Ac�on Enterprises

HO Scale1:87Enterprises

INTER-ACTION

Rail and Tie Craftsman Kits

1973WinnebagoChieftainMotorhome

www.interactionhobbies.com

Kit: HO-7511© 2019Inter-Ac�on Enterprises

Includes interior details and ligh�ng

HO-7511: 1973 Winnebago Chieftain Motorhome Kit Assembly Instructions

Inter-Action Enterprises

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*Dimensions in Inches



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1973 Winnebago Chieftain Motorhome in HO Scale

The late 1960’s and early 1970’s saw the introduction of the iconic motorhome shape which was popular all over North

America for that family vacation and adventure.

This HO kit includes a full interior packed with details and a 12V DC LED lighting strip to help you show off all the details.

The awning can be modeled either extended or in stowed position. Two lawn chair mini kits are also included to put

around your campfire or on the roof to help you relax while on zombie patrol!

Supplied Kit Components:

• 8 sheets of laser cut and engraved stabilized Resin Impregnated Board (RIB)

• 1 sheet of laser cut basswood

• 1 sheet of laser cut clear window glazing

• 2 pieces of styrene channel

• 2 pieces of styrene strip

• 1 piece of styrene ½ round strip

• 1 piece of styrene round rod

• 1 color graphics sheets

• LED strip light

• LED wire leads

• 3D printed parts on carrier (some parts are very small and may fall off the carrier so take caution not to lose

anything when you open the 3D parts box)

Suggested Tools and Supplies:

• X-Acto type knife with fresh blades (#11 style is recommended)

• Tweezers

• Fine sandpaper (400+ Grit) and/or nail file

• Masking tape or clear adhesive tape

• Probond, Elmers white glue or Scotch Quick-Dry Adhesive (I like the Scotch adhesive as it dries with little residue

and has a great fine applicator tip)

• CA glue for immediate bond of small, hard to place parts

• Acrylic or enamel paint

We hope you enjoy making this kit as much as we did providing it to you. If you have any questions, please contact us at

[email protected].

The following instructions and photos will provide the basics for assembling this detailed kit. We have tried to make the

steps as straight forward as possible, but please note that you might want to change the order of assembly to suite your

own technique and modifications that you might make along the way. As usual it is best to familiarize yourself with all

the parts and instructions before you start on this craftsman level kit.

NOTE: If you would like to view these instructions in full colour,

please feel free to download a full colour copy at

and click on the link for www.interactionhobbies.com

"Instructions" near the top of the page.



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1 As shown, your kit comes with sheets of RIB material

along with basswood, plastic and paper components.

As well, there are some 3D printed parts. These parts

are very delicate so take care when handling them.

They are shipped with the support pins still attached.

These are required as part of the printing process.

Care must be taken to carefully remove the parts from

the carrier with an x-acto blade or small nippers. I

usually chip away at them one support at a time.

I like to paint the parts while still in the carrier. Some

parts may need to be painted on the backside as well.

Some touch up will be required after assembly, but this

is a good start.

Painting the 3D parts is easier while still on the supports.

I stick the parts and carrier on some double-sided tape

and to a popsicle stick or scrap piece of wood.

3D printed parts removal with an x-acto blade.

GO SLOW, ONE PIN AT A TIME!

It is easier to paint and detail the covers and doors on

the sides 1 & 3 of the vehicle by cutting them free and

painting them separately.

1



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Glue side panel 1 over side panel 2, aligning them with

the wheel wells as there are differences with the back

edges of each panel. Glue the removed detail panels

back in place.

Glue side panel 3 over 4 again aligning the wheel wells.

Glue in any removed detail panels.

Glue interior cabinet panels in place.

Glue countertop 9 in place as shown.

Paint the oven front and fridge engravings. Glue oven

glazing 10A to the inside of the oven opening on panel

10. Glue panel wall 10 in place. Paint the fridge vents

silver and the fridge doors in your favorite enamel

colors of the era. Avacado green or muted orange were

popular.

Glue 11 and 12 together and paint the sink area silver.

Paint the countertop 13 and glue over the sink assembly.

Also paint the stove your favorite enameled color. The

burner disk would be silver and then highlite the grills in

black.

12

6

4

111

3

5

7

9

10

8

13

2

1

10A



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Glue in the countertop assembly to the slots in the side

wall. You can add a small bit of wire for a faucet if

desired.

Paint the overhead cabinets 15 and glue to 14. Glue the

assembly to the interior sidewall as shown. The upper

face should be flush to the top of the sidewall assembly.

Don’t forget the oven door handle 16. Glue it in place

just above the oven door. This detail seems like a lot of

work, but will look amazing when viewed from the

outside through the windows.

You can also add a bit of styrene scrap fo a faucet since

you have gone this far!!

Glue the bathroom walls 17 and 18 to the interior

sidewall. Glue wall 19 to match slots on 17 and 18.

If you are up to the challenge, you can cut the bifold

doors out of 19 and glue them in the open position as

above. Then you can add some shelves to the inside of

the closet.

16

15 141

19

17

18



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Just don’t put shelving etc in the way of the wheel

wells. Also this is your access for LED wire leads later on

in the instructions.

Paint the cabinets 20 and 21 and glue in place flush to

the top of the side wall.

Glue bottom chassis frame 24 over top of 23. Then glue

the assembly over top of 22. Make sure the front face

of all three align as shown to the right.

17 23

22

20 21

24

25



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Glue the floor 25 to the chassis frame as shown. Take care to align the floor with the chassis as shown so that it is

centered for the tabs to fit the slots of the next step.

Glue the left wall assembly to the floor assembly. Make

sure that any glue residue is removed from the slots

and tabs area so that everything fits tight.

Note the gold microbeads added as door knobs and pulls

on cabinets and doors.

Glue the firewall 26 into the slots on the wall and floor

assembly.

Glue the partition bulkhead 27 in place in the slot in the

left wall assembly and square it to the floor as shown.

26

27



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Glue the front seat floor panel 28 in place.

Glue the settee 29 and 30 supports in place.

Glue the settee panels 31 and 32 in place.

Glue the table support 34 into the slot in the left wall

panel. Glue table 33 to the support and into the slots in

the wall panel.

Sand to soften the edges of the seat cushions 35-38 and

paint with your favorite gaudiest 1970’s color you can

think of to match the upholstery of the time. Glue in

place as shown.

Glue the right hand wall assembly in place making sure

all slots align with their associated tab.

37

34

28

33

35 36

38

31

29

32

30

25



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Paint the dash panel 39 and dash 40 as appropriate.

Beige or dark brown was the color of the time,

especially the dark brown which could be used for

frying eggs on a hot Arizona day.

Cut and glue the supplied paper instrument graphics to

the bottom of the dash covering the instrument holes.

You could also use some scrap glazing between the panel

and the graphics to represent the instrument glass.

Glue dash panel 39 in place in the associated angled

slot. Glue steering wheel doubler 39A over steering

wheel 39B and glue in place.

Glue in dash 40 as shown.

Glue in back interior wall panel 41 into the slots in the

walls. You may need to flex the panel slightly to insert

into the slots.

Glue in bed support 42 in place in slot in back wall and

floor.

39

41

42

40

39

40

39A 39B



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Sand to soften the edges of the seat cushions 39-42 and

paint with your favorite gaudiest 1970’s color you can

think of to match the upholstery of the time as you did

with the front settee. Glue in place as shown.

This is a good time to add some figures or cushions

as added detail before you get to gluing the roof in

place.

Glue back wall panel 43 in place. Glue 44 to 43 and

side walls. They should seat flush against the inner

lip formed by the inner and outer wall panels.

Everything should fit flush to the side wall edges.

Glue inner and outer back window walls together

centered on each other.

43A

43A

43

44A

44

46

45

43



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Glue the upper back panel in place, seating flush into

the step formed by the inner and outer wall panels.

Paint and detail the upper cabinet and glue in place flush

to the top of the wall assemblies.

Paint the seats in that fantastic fabric color scheme you

have chosen. Glue seat sides 50 and 51 into the slots in

the seat back.

Then glue the seat bottom to the seat back and sides.

The seat should sit on the seat sides below the arm rests.

Glue the front seats in place as shown.

Here is a view from the original Winnebago brochure

showing those wonderful colors.

48 47

50 51

49

52



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Glue in header 53 into the slots in the side wall panels.

Glue grill support 55 into the slots in the firewall. Glue

support 54 in the same way. Paint this firewall area flat

black as you will see bits of it through the grills and

headlight openings.

Glue windshield outer frame 57 over top of inner frame

56.

Glue the windshield assemblies in place. You may need

to sand the center face where the two assemblies meet

at a slight angle to make them fit flush.

Paint the headlights 58 silver and coat with gloss

medium or gloss Mod Podge and glue in place. Paint the

marker lights 59 yellow/orange. Coat with gloss

medium and glue in place.

Roll the top of the hood panels 60 and 61 around a small

radius dowel or needle file tang to match the curvature

of the front side wall panels.

59 58

53 54

55

56

57

61

60



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You can form the required radius by rolling the panel in

your palm or between your fingers and dowel/handle.

Glue the panels in place flush into the step in the

sidewalls.

Use modeling putty or Bondo spot putty to fill any gaps

down the center line of the vehicle between the two

hood panels.

Sand the putty smooth to match the contours of the

body.

Glue entry door panels 62 over top of 63. Then paint

and glue door trim 64 over the face of 62.

Paint all of the window trim panels silver. Apply glue to

the lip of the inner door panel and set the window

glazing 65 in place. Pick up trim 66 with some tweezers

and touch it to the top of a dab of white glue. Dab any

excess onto a paper towel and set the trim in place over

top of the glazing.

65

66

61

60

63

62

64



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Follow the same procedure for the windshield glazing

and trim.

… and the back window.

…and so on…

…

Gently fold the front of the roof panel 91 as shown.

Work each fold a little at a time to form the shape

shown to the right.

Test fit it to the vehicle to get the front folds as close as

possible to the contour of the upper front sidewalls.

67

70

69

71

84

83

68

82 81

91

72 74

73

75

76 77

79

78

80

85

89

88

87 86

90



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Mark where the LED strip will go so that it does not

interfere with the interior components of the vehicle.

Stick the LED strip to bottom of the roof with the

attached self-adhesive strip. Reinforce by gluing along

the edges of the strip.

Solder 2 wire leads to the + and – LED pads and route

the wires down and through the left rear wheel well.

Connect the wired assembly to a 12V DC power source

to test. Do not use more than 12V DC as you could over

heat the LED’s and cause a fire.

You may need to trim a bit of the upper lip of the

cabinet wall to fit the wiring. Once you are happy that

everything fits, glue the roof panel in place. Start at the

front and fit the taper to the top of the windshield

assembly. Slowly work aft to make sure everything

stays square and tight.

Paint upper grill 93 silver. Then shape the grill as shown

to match the front of the hood assembly. Take care to

not damage the very fine grill fins.

Do the same with the lower grill 94.

Glue the grills in place centered on the vehicle and grill

openings. Paint grill trim 93A and 94A silver and glue

over 93 and 94.

Paint the headlight trim silver and glue in place as

shown.

95

94

96

91

93

93

94A

93A



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Paint the bumper gloss silver and shape to fit the front

contour of the vehicle. Glue in place to the extruding

frame attachments.

Paint the 3D printed rear wheels and tires. Typical color

for the wheel hubs were glossy white. Apply a small

amount of glue to the outside face of the wheel and

slide the tire over top of the Wheel. Do the same for the

inside wheel.

Paint the 3D printed front wheels and tires. Typical

color for the wheel hubs were glossy white. Apply a

small amount of glue to the outside face of the wheel

and slide the tire over top of the wheel.

Glue the front axle 98 to the suspension frame 99 as

shown and glue the wheels in place.

Glue the rear axle to the rear wheels as shown.

Glue the front wheel assembly in place as shown.

99

98

100

97



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Glue the rear wheel assembly to the chassis centered

on the fender opening.

Paint and glue the spare tire to the back of the vehicle as

shown.

Paint the luggage rack 101 silver. Form it as shown and

glue to the top of the vehicle roof as shown.

Paint the ladder 102 silver. Form as shown and glue to

the back of the vehicle so that the tail light 103 will not

interfere.

Paint the tail lights 103 gloss red and glue in place as

shown.

Paint the 3D printed air conditioners white and glue in

place as shown.

103

101

102



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Paint the TV antenna 104 and 105 silver and glue in

place either in an up or down position.

Glue roof vents 106 in place in the 3 positions as shown.

Paint the mirror support 107 and mirror 108 silver. Glue

the support 107 in place into the slots in the side walls.

Then glue the mirror in position to the back face of the

support as shown.

Instructions for canopy in the closed position: Cut the two channel pieces to 0.88” long. Cut the 0.040” dia.

rod to 2.29” long. Cut two pieces of styrene strip to 0.65”

long. Glue a strip into the styrene channel so that they are a

total of 1” long. Paint the rod and arm assemblies silver and

glue in place on the right side of the vehicle as shown above.

Instructions for canopy in the open position:

Select and cut out

your favorite

colored paper

canopy. Score along

the fine blue line in

the canopy with a

very light run using

the back edge of an

x-acto blade or pin.

Cut the supplied ½

round styrene rod

to the length as the

paper canopy. Paint

it silver and glue it

to the scored flap in the paper canopy so that it sits

flush to the top edge of the canopy flap.

Run a small bead of glue along the canopy edge and glue

to the top edge of the vehicle side as shown.

Cut the two channel pieces to 0.88” long. Cut two pieces

of styrene strip to 0.65” long. Glue a strip into the

styrene channel so that they are a total of 1.31” long.

Paint arm assemblies silver and glue in place on the right

side of the vehicle as shown above.

104

105

106

108

107



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Cut two styrene strips to a length of 0.79” long. Glue

one end into the channel just above the already glued

in strip. Glue the other end to the top corner where the

canopy edge meets the wall of the vehicle.

Do the same for the back canopy brace.

Paint the 3D engraved lawn chair legs and frame silver,

and the webbing to the desired color. Paint the 2 arm

rests white.

Carefully bend the chair frame in half to form the back

and seat. Apply some glue to the top of the leg cross

bar and glue at a slight angle as shown. Do the same for

the second leg. Glue the left and right arm rests to the

top of each leg stub and to the seat back as shown.

Sit back and enjoy your favorite beverage around the

campfire as you have earned it!

<fire pit is just bits of scrap wood painted grey along

with some carved wood logs>



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1973 Winnebago Chieftain Motorhome - Inter-Action Hobbies...glazing 10A to the inside of the oven...

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