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 ...ter of World War I and Jason, the Gipsy Moth used by
\t late Mrs. Mollison (then Miss Amy Johnson) on her Australia flight
f 1930. Examples of earlier aircraft engines occupy the glass cases.
Frost's ornithopter, or flapping-wing machine, of 1902 (3 h.p.
single-cylinder engine). The wings, each of 8ft span, are made of
cane, silk and hundreds of real feathers. There is no record of its
having flow...
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 ...khchivandji flew it on May 75, 7942
a discreet communications link for ranges of several miles. A filmshowed radio-proximity fuzes in shells fired at aircraft silhouettes
suspended from a test tower.
Ornithopters in the Family
A NEW manpowered ornithopter has been designed by•**• Lawrence G. Watts, a technical artist in the Coventry office
of Iliffe & Sons Ltd., publishers of Flight. This project ...
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 ...ated by Jobert, Holland, as, well as Henry
McKee. The last-mentioned, during 46 years of study, first
attracted my attention to this principle, and is the only one whom I
have yet met who has made ornithopter models really fly. They
were simple contrivances with loose surfaces to test the late
Mr. Breary's " skate " theories.
The roller type, of which I enclose a diagram, is of my own
desig...
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 ...e ordinary, and we
should certainly like to see similar ones more in evidence. It would
be interesting to know the duration, speed, and usual altitude at
which the model flies.
The Problem of the Ornithopter.
(Continued from page 1233.)
Mr. E. E. Wilson's Models.
" Herewith," writes Mr. Wilson, " I send you some diagrams of
two distinct types of ornithopter models which I have designed and...
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 ... the smooth working of the wings.
" (8) That the experimentalist must be prepared to exercise the
greatest patience, as model after model is sure to be broken when
testing. In fact, the science of ornithopter model flying is a life
study, and the £$ prize offered for such stringent conditions is
ridiculously inadequate.
" A model ornithopter is in essence a scale working model of a
full-siz...
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 ...OVEMBER I, 1913 (/JJCHT
Edited by V. E.
The Problem of the Ornithopter.
(Continued from page 1182.)
ASSUMING that some form of springs are employed, they must
obviously be so chosen as to give the correct number of oscillations
(up and down strokes) per m...
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 ...fiwr NOVEMBER 8, 1913.
Edited by V. E.
The Problem of the Ornithopter. A Model Ornithopter.
The ornithopter drawings which we give this week are taken from
a French model which can be obtained commercially.
The drawings show the wing flapping mechanism qu...
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 ...inction between the two terms just yet. Strictly
speaking, the term " orthopter" denotes nothing more
nor less than a something having straight or regular
wings ; whereas the term " ornithopter " denotes a some-
thing having bird-like wings. The question is, therefore,
what fundamental qualities of a flapping-flight machine
assimilates its wings to those of the ...
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 ...ary to the first meeting of the Man-powered Aircraft Group of the Royal Aeronautical Society(tonight, October 30), two British manpowered aircraft
have been "unveiled." The aircraft concerned are the ornithopterdevised by Emiel Hartman, a London sculptor,.which was taken
to the College ot Aeronautics, Cranfield, and carried out taxyingtrials there on October 20; and the inflatable fixed-wing aircr...
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 ...commencement of a Notable New Era of
Advancement in the Art of Aerial Navigation.Used by all the Principal Aviators of the Day,
it is invaluable for the unfreezing of Free andCaptive Balloons, Kites, Ornithopters, Dirigible
Airships, Intrepid Birdmen, Pet Parrots,Triplanes, Sesquiplanes, Umbrellas, Brass
Monkeys and Chorus Girls.
ROLLASON AEROCESSORIES LIMITED
CROYDON AIRPORT SURREY, ENGLAND
SUPRE...
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 ...s against such odds, without loss, at one
and the same time.Sidcup, Kent. • ^ -
A.G.WILSON.
Soviet Flapping'Wings—and Other ThingsT
HE letter by Mr. Galitzine (July 15th) regarding his great-uncle's ornithopter glider is of considerable interest. Per-
haps the facts which you suggest, that the Kashuk does notoperate on the same principle enables the Soviets to claim
another first.As far as I can ...
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 ...trength feasible. Neither has action been taken to have either
«AAF Airfield Construction Squadron construct a ski-way, norlas any other organization been instructed so to do.
451
H. B. Passat's 1920 ornithopter (see letter below)
Rear Admiral Tyree, USN commander of "Deep Freeze 5," wasquoted on February 26 as saying that the Marble Point airfield
proposal is feasible. However, the cost could be ...
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 ...g the control lever sideways.
2. The leading edge of the front elevator tilts with the trailing
edge of the rear elevator.
3. Aluminium flanged sockets.—ED.].
nearest approach to the bird wing or ornithopter principle as
embodied in his latest machine.
I should also like to understand the mechanical movement
embodied in Mr. J. B. Passat's ornithopter (882), illustrated in
FLIGHT of Novembe...
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 ...PTERS, which are very much in the air—literally
just now, are not the only rivals to more orthodox methods
in the present field of aeronautical development. M. Passat,
who has been experimenting with ornithopters for a consider-
able number of years, is now at work on a new type of machine,
which he aptly calls a " Helithopter "—a sort of crossbreed
between a helicopter and an ornithopter. We unde...
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 ...PRIL 10, 1924
THE "ANNULAR" TYPE OF AEROPLANE
THE process of flying the modern aeroplane has been described
as'' forcing a petrified ornithopter through the air." Whether
or not the expression does adequately define flying as we know
it today, it is not altogether inept, and, after all is said and
done, that is practically what ...
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 ...and particulars of two machines with which
Mr. Travers Ayers has carried out some experiments.
Referring to Fig. I, the span tip to tip of wings is 25 ft. and the
weight 50 lbs. To manipulate this ornithopter the pilot, whose
shoulders are suitably strapped to BB, stands on plntform A, the
weight of the man upon which pulls down CC, and the latter being
fastened to the wing arms forces them ...
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 ...te one point of considerable importance ;o
anyone engaged in this field of research, which I do not believe has
been sufficiently emphasised heretofore : the location of the centre ol
MR. PASSAT'S ORNITHOPTER.
[882] I am pleased to forward you the photos and the parti
culars of my ormthopter, which I promised you.
PLAN. rrrorti.m-.
pressure varies, not only with rhe curvature and angle, but...
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 ...e competition, but could not leave my
business at the time to attend. I wonder how many students of
aviation there are who thoroughly comprehend the great difficulties
to be overcome in successful ornithopter flying ? And how many
there are in the United Kingdom who can honestly claim to have
designed and flown such a model 10 ft. let alone ioo. My own
experience is typical probably of many,...
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 ...ing wings, designed
by D. Ilyin, has passed its bench tests. A group of designers arebuilding a sailplane with moving wings. Designer A. Ivanyuta
is continuing to work on a combination of bicycle and ornithopter."The report added that "it is quite likely that the first ornithopters
will rise into the air in the USSR," and that very light engineshad already been designed for these aircraft. Calcula...
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 ...2 October 1954 613
F;g. 4. Coy/ey's sketch of a man-actuated ornithopter.
a suitable engine. He writes in 1808 : "Being in want of a simple
and light first mover on a small scale for the purpose of some
preparatory experiments on aerial navigation, I constru...
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