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Bob's Card Models
www.bobscardmodels.com
Savoia-Marchetti S.55 1:72
The Savoia-Marchetti S.55 was a double-hulled flying boat produced in Italy beginning in 1924. Shortly
after its introduction it began setting records for speed, payload, altitude and range.
The S.55 featured many innovative design features. All the passengers or cargo were placed in the
twin hulls, but the pilot and crew captained the plane from a cockpit the thicker section of the wing
between the two hulls. The S.55 had two inline counter-rotating propellers achieved by mounting the
twin engines back to back. The engines were canted sharply at an upward angle. Two wire-braced
booms connected the triple-finned tail structure to the twin hulls and wing.
Many variants were manufactured.
Acknwledgements
Many thanks to Bryan Ribbans of
www.seawings.co.uk
for the numerous sketches, photos and
diagrams, and to Wikipedia for the specifications.
General characteristics
(Wikipedia)
Crew
5-6
Length
16.75 m
Wingspan
24.00 m
Height
5.00 m
93.0 m
2
Wing area
Empty
5.750 kg
Loaded, max. takeoff
8.260 kg
Powerplant
2 x Isotta-Fraschini Asso 750V 656 kW (880 hp) each
Performance
Max speed
279 km/h
Range
3.500 km
Service ceiling
5.000 m
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Building Instructions
Print all sheets on card between 160 and 230g per square metre, except Instructions and Sheet 6 which should
be printed on 80 - 90g Paper.
Always carefully fit parts together before gluing, and make minor adjustments if necessary.
Bright Green areas must be cut out, BUT only after gluing any folds. The Instructions will tell you when!
Tabs are marked with a red dot …..
Dotted , should be folded upwards (valley)
Full line, should be folded downwards (mountain)
Grey, not folded.
Fuselage
1
Cut out parts
1
to
5
, as per instructions on Sheet 1 (NOTE: there are TWO hulls) Glue/close parts
3
,
4
,
and
5
. Glue
1
onto
3
. Finally, glue on
2
.
TIP: Cut the parts to oversize, including the arrows showing the position of the rounded folds,
folds, then cut the part to size.
2
In the front of the fuselage, at least 8g counterweight should be glued into EACH hull.
Wings
3
Cut out both wings
6L
and
6R
, fold and glue. Glue the edges of strut
A
, and insert in one of the wings
as far as it will go. Repeat for the other wing.
4
Cut out the 2 strips
8L
and
8R
, which join the wing tips to the central portion. Fold each in half, then
insert/glue halfway in each wing tip. Insert a strut
B
into each wing, more or less flush with the
ends.
5
Cut out and fold central wing portion,
7
. Glue on the strut
C
, so that its rear end line up with the slits in
the tab (between the tabs marked with an
x
), and glue/close.
IMPORTANT NOTE: Glue on
upside down, as the upper side is that with the cockpit position.
6
Join/glue the central part to the wing tips.
7
Cut out, fold, glue the cockpit
9
onto the position marked..
Tailplane
8
Cut out and assemble parts
10 – 13
. TIP: Before closing/gluing rear wing
10
, push the tabs of the 3
fins through the slits in the wing, and glue, THEN close/glue the rear wing.
9
Fix the Tailplane unit to the main wing and rear of hull using 2-3mm diameter barbecue sticks …… cut
2 to a length of 13cm each, and 2 to length of 9cm each. The 2 9cm sticks are fixed in the top rear
of each hull, the 2 13cm sticks into the green-marked small rings on the top of the wings. Glue in
position so that the upper 2 sticks are parallel to the surface, when the plane is set on a table. Glue
the tailplane on the rear end of the 2 stick pairs. Sheet 6 shows the configuration of the barbecue
sticks and tooth picks.
10
Join the top of the fins
11, 12, 13
with the connector
13A
.
Engine
11
Cut out and assemble propellers
14
, nose cones
15
, engine cowling
16
.
12
Cut out the 2 Engine support strut units
17
, fit UNGLUED in their respective positons left and right of
the cockpit.
13
Cut out and assemble the 3 Cylinder Head Cowlings
18
, and glue in position on the engine cowling
16
.
14
Glue the whole engine unit onto the support strut units
17
. Glue in place on the Midwing in the green
slits marked.
15
Cut out, glue tab, insert in each end of engine cowling, the inserts
19
.
16
Assemble the Propeller and Nose Cones
14
and
15
.
“Rigging”
15 Use black elastic thread: thread through the front wings in the positions marked, and around the rear of
the booms.
Stand
16 Optional: Cut out, assemble and glue from Sheet 7.
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