F-1F-2T

F-2B

F-3T

F-3B(2)

F-4T

F-4B(2)

F-5T

F-5B

Reference photos of a Bea

Landing gear legs are .025piano wire

Front landing gear legsRear laflat viewside vieshape is

Note: these cross pieces do not haveformers attached. They help establishthe proper curve of each fuselageside.

1/16" x 1/4" balsa

1/16" x 3/16" balsa

C-1(2)

C-2(3)

Spherical balsaspacer

Peck thrustbearing

1/32" plywooddisk

Carve from balsa block R

Carve these parts from balsa blocks

1" Diameter wheels

0 1 2 3Inches

0 1 2 3Inches 0

T F-4T

F-4B(2)

F-5T

F-5B

T-1

F-6T

F-6B

F-7B

F-7T

F-11

F-10

Fin/Rudder outline is twolaminations of 1/32" x 1/1

Green

RedYellow

Color and Marking Notes:Markings are those of the Ghana Air Force. Base color isorange yellow. Fuselage has a red trim stripe that includethe nose. The fuselage is white above the red trim stripe.Matt black anti glare panel forward of the windshield. Staron the fin and numerals are black. The national insigniagreen at the center, then orange yellow, and red for theouter ring.

Reference photos of a Beaver in the Ghana colors

Landing gear legs are .025piano wire Rear landing gear legs -

flat view. Bend to theside view after basicshape is formed.

Rear landing gearlegs side view

Top and bottom stringers areshown for clarity

these cross pieces do not havers attached. They help establishoper curve of each fuselage

1/16" x 3/16" balsa

Fuselage core structure is1/16" square balsa

Note: This longeron sits on top of the uprights.See the fuselage crossections for reference.

Right side window location

Windows are cut in 1/32" sheet balsa thatfits between the top and center longeron

Carve these parts from balsa blocks

1/8" Balsa

Bottom longeron

See cross se

0 1 2 3Inches

Windshield Pattern

T-1T-2

DeHavilland Otter

Original Desgin by Pres Bruning - Nov. '74

CAD Drawing by Paul Bradley - June 2010

21.5" Span Rubber Power Scale Model

Sheet 1 of 5

F-7B

F-7T

F-8

F-9

T-3

T-4

T-5

T-6

T-7

T-9

R-1

R-2

R-3

R-4

G208Fin/Rudder outline is twolaminations of 1/32" x 1/16" balsa

Redow

and Marking Notes:gs are those of the Ghana Air Force. Base color isyellow. Fuselage has a red trim stripe that includese. The fuselage is white above the red trim stripe.

ack anti glare panel forward of the windshield. Starfin and numerals are black. The national insigniaat the center, then orange yellow, and red for theng.

Rear landing gearegs side view

Top and bottom stringers are notshown for clarity

Tail wheel leg is .025 piano wire

Tail wheel leg flat patternFuselage core structure is1/16" square balsa

longeron sits on top of the uprights.selage crossections for reference.

2" sheet balsa thatcenter longeron

1/8" Balsa

n

See cross sections

3 0 1 2 3Inches

Windshield Pattern

When laying out out each fuselage side please note that the top longeron rests ontop of the uprights from station F-7 forward. At station F-7 the upright is notched toone half it's depth at the top. The top longeron is flush with the uprights at stationsF-8 and F-9. The center stringer/longeron rests on top of the uprights from stationF-7 forward. It is flush with the upright at station F-8 where it ends.

Notch the top of the upright at fuselagestation F-7

F-2 F-3 F-4 F-5

0 1 2 3Inches 0

hat the top longeron rests onF-7 the upright is notched to

h with the uprights at stationsp of the uprights from stationwhere it ends.

F-4 F-5F-6

F-7

0 1 2 3Inches

DeHavilland Otter

Original Desgin by Pres Bruning - Nov. '74

CAD Drawing by Paul Bradley - June 2010

Sheet 2 of 5

21.5" Span Rubber Power Scale Model

F-7

F-8F-9

3 0 1 2 3Inches

0 1 2 3Inches 0

W-1

W-2 W-2 W-2 W-2W-3

Note: Root rib is slanted 3 degreesto accomodate dihedral angle

Wing struts are 1/16" x 1/4" spruce

W-2W-2W-2W-2W-2 W-3

National insignia on toare on the bottom

1/16" Square balsa1/16" Balsa

0 1 2 3Inches

W-2 W-2 W-2 W-2 W-2W-3

1/8" x 5/32" Balsa

3/32" x 3/16" balsaNational insignia and nutop wing surface

Carve the tips from ba

grees

9/16" Dihedral under each tip

struts are 1/16" x 1/4" spruce

W-1

W-2W-2W-2W-2 W-3

National insignia on top of wing, numeralsare on the bottom

re balsa

T-1

T-2

T-7

T-4

T-3

T-2

Make these parts from

1/16" Balsa

1/16" Balsa

Wing strut mounting pad.from 1/16" balsa.

3 0 1 2 3Inches

DeHavilland Otter

Original Desgin by Pres Bruning - Nov. '74

CAD Drawing by Paul Bradley - June 2010

Sheet 3 of 5

W-2 (14 1/32" balsa)W-2

W-1 (2 1/16" balsa)

W-3 (2 1/16" balsa)

1/8" x 5/32" Balsa

32" x 3/16" balsaNational insignia and numerals are ontop wing surface

Carve the tips from balsa blocks

T-9

21.5" Span Rubber Power Scale Model

9/16" Dihedral under each tip

W-1 T-1

T-2

R-1

T-7

T-6

R-2

R-3

R-4

T-5

T-4

T-3

T-2

Make this set of parts from1/32" balsa

Make these parts from 1/16" balsa

1/16" Balsa

Wing root rib angle guide

Wing cross section

Wing strut mounting pad. Make twofrom 1/16" balsa.

0 1 2 3Inches

F-3B

F-2B

F-1

F-6B

F-8

F-7B

F-2T F-3T

F-6TF-7T

C-2C-1

1/8" Balsa1/8" Balsa

Right side windows - 1/32" balsa

Left side windows - 1/32" balsa

Motor pegfrom 1/8"

F-2T is flat view

Note: Upright at station Fat the top to 1/2 it's depth

0 1 2 3Inches

F-3B F-4B

F-8F-9

F-3T F-4T

2" balsa

windows - 1/32" balsa

F-11

7/32" Al Tubing

Exhaust Faring - Make two

All formers are 1/16" balsa unless otherwise noted

Fin/Rudder lamination form

F-10

Motor peg support - make 2from 1/8" balsa

Note: Upright at station F-7 is notchedat the top to 1/2 it's depth

Cowl air

0 1 2 3Inches

F-4BF-5B

DeHavilland Otter

Original Desgin by Pres Bruning - Nov. '74

CAD Drawing by Paul Bradley - June 2010

Sheet 4 of 5

F-4TF-5T

7/32" Al Tubing

two

21.5" Span Rubber Power Scale Model

herwise noted

Fin/Rudder lamination form

Cowl air scoop

Nose plug -1/32" plywood

0 1 2 3Inches 0

Wing halves alocated by theedge, and spaformer F-10. Fspruce wing s

The side windows fit between the top and center longerons. Use1/32" balsa shims between the window panels and the uprights.

0 1 2 3Inches

Wing halves are glued to the fuselage sides. They arelocated by the extensions of the leading edge, trailingedge, and spar that fit into the appropriate slots in fuselageformer F-10. Flight loads are carried by the 1/16" x 1/4"spruce wing struts.

The remplywooparts Cparts thfit insidformerof the dsphericradial eor othe

ns. Useprights.

0 1 2 3Inches

DeHavilland Otter

Original Desgin by Pres Bruning - Nov. '74

CAD Drawing by Paul Bradley - June 2010

Sheet 5 of 5

21.5" Span Rubber Power Scale Model

age

The removable nose plug is assembled from a 1/32" plywood disk that fitsinside the opening in cowl parts C-2. It is retained in the nose by thesquare parts that are glued to the back of the disk and that fit inside theopening in cowl parts C-1 and fuselage former F-1. A spacer is needed onthe forward face of the disk to provide prop clearance. The spacer isspherically shaped to simulate the front case of the radial engine used onthe full scale aircraft. A Peck, or other suitable, bearing is used in thespacer.

When forming the nose ring do not fully cut out the square hole in partsC-1. Make cuts along each side but leave the corners un-cut. Laminate theparts making sure the square holes line up. Use a 2-56 bolt in the centerhole to hold the laminations. Place the bolt in an electric drill and use thedrill to turn the nose ring to shape. Once the nose ring is shaped cut outthe square hole.