Avro 671 Rota 87.pdf

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AVRO 671 Rota Mk I
(Cierva C.30A) British WWII autogyro
From an 1/72 original by © Kampfflieger 2004
1/87 kit & 3 civilan versions by Leif Ohlsson
Print on 5x7” (13x18 cm) paper for a nice large picture
postcard size kit. Or print two pages per sheet on ordinary
A4 or Letter size paper. Only the two last pages of each
model need to be printed on photo paper (one A4 or Letter
size sheet). View other pages on screen. Shown here are the
three Avro Rota autogyros modeled in the kit. The two
pro les at right are shown in the real size of the nished
models at 1/87 scale.
(Left:) G-ACUU went through all three color schemes during it active life, the rst
one blue and white like G-ACIN above, the second in RAF camo scheme like
K4235, and the third in silver and blue, as seen at left 1971 at the Duxford
Skyframe Museum. The blue, and the silver versions are both modeled in the kit.
Photo courtesy: R.A. Schole eld, Airliners-net
Wherever a source is indicated, click on that text and get to the original for photos
and drawings. Roman Vasilyev ( Kamp ieger) has modeled many other autogyros
in a new updated 1/48 version of his British Avro Rota. An older, 1/72 free
download of the Rota has been used as a base for this kit, with Roman’s kind
permission.
Kamp ieger models source: Ecardmodels-com
(Pro les above:) K4235 in WWII color scheme, as modeled in the original kit,
included here at 1/87. G-ACIN in blue & white, as used by the Metropolitan Police
of London in 1934, also modeled in the kit, beside the blue G-ACUU.
Pro le sources: Wings Palette K4235
Wings Palette G-ACIN
The Cierva C.30 was an autogyro
designed by Juan de la Cierva
and built under licence from the
Cierva Autogiro Company by A V
Roe & Co Ltd (Avro), Lioré-et-
Olivier and Focke-Wulf.
Avro built 78 Cierva C.30, tted
with an Armstrong Siddeley
Genet Major IA, a 7-cylinder
radial engine of 140 hp (100 kW).
The rst production C.30A was
delivered in July 1934.
Twelve C.30A built by Avro for
the Royal Air Force (RAF) entered
service as the Avro 671 Rota Mk
1, one of the subjects of this kit.
Of the 66 non-RAF aircraft built
in the UK by Avro, some dozen
or so were sold on abroad, but
others were own by wealthy
enthusiasts. 26 aircraft were
directly exported by Avro. These
went both to private owners and
to foreign air forces who wished
to investigate the autogyro's
potential.
19
20
20
18
16R 17R
12R
13R
21
4
5
1
3
2
13L
14R 14L
15
6
10
12L
7
8
11
16L 17L
9
5a
5b
Sideview below is ca. double
the size of the nished 1/87
models. Some deft ngers
and experience are required
to make them – the real size
of the models can be judged
from the pro les on the cover.
A
B
C1
C2
D
Source:
Wikipedia
Autogyros were the rst rotary wing aircraft to y successfully with
su cient control. The design had inherent safety, better low-speed ight
than airplanes, as well as the capability of vertical take-o and landing.
Despite these advantages, autogyros were never really accepted.
Image source:
Autogyro History and Theory
by Je Lewis.
Tons of similar images and much to read
about autogyros on that page!
3-view is 1/87 scale,
same as model
Source:
Flickriver
Before the experimental Cierva C.19 Mk V,
autogyros had been controlled in the same
way as xed-wing aircraft, by de ecting the
air owing over moving surfaces such as
ailerons, elevators and rudder. At the very
low speeds in autogyro ight, particularly
during landing, these controls became
ine ective. The experimental machine
showed that the way forward was to have a
tilting rotor hub and a control rod coming
down from the hub to the pilot's cockpit
with which he could change the rotor
plane. This was known as "direct control"
and was tted to the C.30.
To enable the aircraft to
take o without forward
ground travel, Cierva
produced the "Autody-
namic" rotor head, which
allowed the rotor to be
spun up by the engine to
higher than take-o r.p.m
at zero rotor incidence
and then to reach
operational positive pitch
suddenly enough to jump
some 20 ft (6 m) upwards.
Source:
Wikipedia
A number of civilian autogyros were impressed during WWII. Autogiros were used by the RAF to
check and calibrate radar stations as they were able to y in very tight circles. K4235 was once
G-AMHJ, and is modeled in this kit in its wartime color scheme, as once preserved at Old Warden
and photographed here on a sunny day in 1995. Three years later it was sold to the USA.
Photo courtesy:
Joop de Groot,
Airliners-net.
This photo was used
to color correct
the model of K4235.

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