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10 corrections, most recently by pruemason - Show corrections

AUSTRALIAN AVIATOR.

VICTORIAN DESIGNED

BIPLANE.

YOUNG ENGINEER'S ENTERPRISE

SATISFACTORY FLIGHTS.

By OLD BOY.

On the top bough of a dead giant gum- tree, growing on the bank of the Stone

Mr. DUIGAN IN HIS WORKSHOP.

The workshop in which Mr. Duigan built his biplane is an ordinary lean-to, with corrugated Iron roof and earth floor. Mr. Duigan is at his lathe, and standing in front of him, against the wall, is the pro-  

peller rejected as being too small.      

Jug Creek which runs through the Spring Plains sheep property, between Mia Mia   (four miles from Redesdale) and Heath-   cote, a yellow-crested cockatoo sat acting       as sentry for his fellows quietly feeding     in a crop some distance away. The time was 5 o'clock on the morning of January   25 and the sun was just rising behind the   neighbouring hills. In the growing light the cattle were browsing and the scene   was one of pastoral peace. A warning screech from the cockatoo was answered by the "chuckle," "chuckle" of the flock     in token that they had accepted his     signal, and the cattle--their attention turned from feeding on the grass by the creek--stood up to look at something new.   The Spring Plains homestead was just     rousing for the work of the day when     from a shed at the rear a large unwieldy

looking object was drawn out, and with       great care wheeled slowly down the steep       hill to the creek. It was this which had     caught the eye of the sentinel cockatoo,   and no wonder that he screeched his     warning, for his domain--that of the air      

was to be assailed by the first Australian       aeroplane designed, built and flown by a   young Australian.      

The Spring Plains Estate belongs to     Mr. J. C. Duigan of Ivanhoe, whose sons     live on the station and manage and work it. Mr Reginald Duigan is the manager,         and his elder brother, Mr. J. R. Duigan, assists him, and, as a skilled engineer and       mechanician, attends to all the mechanical     work on the station. Here, in his spare time, and in most adverse circumstances,         he has designed and built an aeroplane,       and has succeeded in flying.

Mr. John Duigan, the successful builder       and aviator, was educated at Brighton       Grammar sSchool under Dr. G. H.     Crowther. After a short course at the   Working Men's College, he went to Eng-      

land, where, entering Finsbury Technical           College, London, he studied under Pro-       fessor Sylvanus Thompson, and took out         his diplomas in electrical and motor en-       gineering. After a short period of prac-   tical work with the Wakefield and Dis-  

trict Light Railway, between Wakefield     and Leeds, he returned to Victoria, and saw more practical work in the service of G. Weymouth Proprietary Ltd., electrical   engineers, in Melbourne. Then he went     to join his brother at Spring Plains and  

almost immediately conceived the idea of flying.  

It was about four years ago, when aviation

     

This picture shows the biplane in full flight just as it was rising again after the first "hop." Mr. Duigan can be seen with his hand on the lever, raising the elevator plane.    

was becoming a possibility, that Mr. Duigan began by building a pair of immense wings 15ft x 3ft., with a hole in the centre for his body. These were made in a day, and as quickly discarded, for beyond a heavy fall there was no result. The first attempt ended in smoke in more ways than one, for the wings which would not fly were used for

fire-lighting.When Wilbur Wright made

his first flights in France, Mr. Duigan ob- tained a picture of the Wright machine and built one on a smaller scale. He had no engine, but single-handed, and with the ordinary tools found in the station work shop, produced a "glider" of 20ft span, with which, after considerable difficulty, he   had some useful practice, but, owing to gusty ninds, was unable to rise morelthan     4ft at any time. This was in March,

1909.

Three months later the library at Spring Plains was enriched by a present from a former comrade at Finsbury College of Sir   Hiram Maxim's book on "Natural and Arti-  

ficial Flight." The thirst for knowledge of   the air had been whetted by the previous attempts, but with this new book the young

Victorian found himself supplied with accu-     rate datafor calculations. At first the     purchase of an engine from Paris seemed     beyond his means--£400 was the price       quoted--and the idea of making a power-  

Crossing A Creek.

In order to reach the flying ground from thehomestead, a creek had to be crossed after the aeroplane     has been brought down a hill with a grade of 1 in 4. The bridge is of single planks, and Mr. Duigan       can be seen guiding the aeroplane, while his assistants are pushing.    

driven machine seemed as fas off as ever.  

The determination necessary for a pilot of       the air was, however, firmly fixed in Mr.   Duigan, and this difficulty was soon over-     come. A Melbourne engineer (Mr J. E.   Tilley) undertook to provide an engine as light and powerful as could be obtained       from Europe, and at a much lower cost. It      

was to be a four-cylinder air-cooled 86 x  

108, and to weigh about 100lb. He also secured a propeller 7ft. diameter and 6ft.         6in. pitch, which, with a speed of 800 revo- lutions per minute, allowing a slip of 20   miles per hour, provided a speed of 30 miles   per hour to the machine. Subsequently       the propeller was altered, and Mr. Duigan designed and made a new one, 8ft. 6in. in

diameter and 10ft. pitch, in order to give an increase of speed to about 40 miles per   hour, which he considers necessary for   proper flight.

Mr. Duigan prepared his own plans and drew up his own specifications, and then commenced the work of construction in a shed specially built for the purpose. He chose mountain ash for the woodwork, which, though very elastic and light, was very hard to work. The station workshop   provided few facilities for the task, and from first to last Mr. Duigan toiled single handed. He was sole designer and me-

chanic. He had never seen an aeroplane, but his thorough grounding in mechanics, his practical motor and engineering experi-

ence, and his indomitable patience and perse-

verance gradually overcame every difficulty.   One trouble, and cause of much loss of time was his distance from Melbourne, and     with an unsatisfactory train service, he         found that whenever he required anything

he could do it better by a journey over     rough bush roads on his motorcycle, a       journey of 80 miles each way. This jour-         ney to and fro he sometimes accomplished     in a day, in order to get back as quickly as             possible to his shed, in which much of the       work was done by lamp or a candle light.    

It is unnecessary to go into detail as  

to the various contrivances employed by           Mr. Duigan. He was his own carpenter, turner, fitter, brazier, blacksmith, and   often toolmaker as well. His little work- shop, overlooking the flatwhich was subse-       quently to be his flying ground, fairly   hummed with the noise of hammer and saw and plane and the clang of his anvil, and gradually the machine assumed shape.

The weight of all the wood had to be calculated, and as it was dressed to size and shape, had to be weighed, from time to time, to see when the limit allowed was reached. The aviator in the making was   working it all out for himself and as he   slaved at it, giving it all the time he could spare--for the services of a skilled me- chanic were largely availed of on the sta- tion--he brought in adaptations and im- provements which are unknown in any other machine. Sir Hiram Maxim's book had laid the foundation; knowledge, in- genuity, and mechanical skill had caused developments. One ingenious improve- ment was the institution of air   springs for the running wheels. Mr.   Duigan had great difficulty in getting the pistons to hold air, but the re- sult has been full compensation for all the   trouble, for air is infinitely superior to steel for springs, and much cheaper and lighter than rubber. The cups are made of

rubber, lubricated with flake graphite and     glycerine, and are thus free, and absolutely air-tight. The material for covering the  

planes was only decided upon after repeated       experiments, a rubber fabric, fairly light and strong, manufactured by the Dunlop Rubber Company, proving most suitable and at the same time less expensive than anything else. The main planes were cov-

ered in position, while all the others were first covered and then fixed in their places. The engine having been placed in a firm bed, the machine was ready for use, but in the numerous trials on the ground Mr Duigan found that the drive from engine to propeller shaft, which was by 1 5/8in. rubberised leather belt, 7/8in. deep, would   not prove satisfactory and eventually a steel chain was adopted.

Mr Duigan tells the story of his first trials in these words:-- When everything was   fixed in position, I got my brother to help while I ran the engine. We put chocks to   the wheels and he held against it while I tried one cylinder. This ran all right, but   shook everything terribly, so I tried two cylinders. When both got going the pro-     peller began to hum, and so did the dust.       The two made a pretty good wind in the     shed. As everything seemed all right, I       next tried the whole four, and as soon as they started there was a gale, with the     machine pushing hard to get away. How-     ever the engine was running badly, miss- ing and spluttering the whole time. Ex- haust springs were rather weak, and when   these were strengthened things were a bit     better, but still a long way from right.    

When the engine was missing, of course, it     shook the machine up a lot, so that I did   not like running it. The carburetter seemed       too small so I took a large 'Schebler' out       of an American motor bugegy that we have,  

and fixed it on. The next trial was quite     different, for the engine raced away without  

a misfire, and very little vibration, while   the push was very much greater. This was     so satisfactory that after a little tuning up       we took it down to our so-called flying   ground. To get it there we had to take it down a hill of about 1 in 4, through two fences and across a creek. After a bit of a struggle we got it there undamaged and   I climbed into the seat--or rather on to the board that served as a seat--and with some       misgivings started the engine. As soon as   my friends let go she ran along the ground     in good style, and seemed very steady. This

run ended up a fairly steep hill, and she       took it easily, with the engine throttled. I             had several runs up the hill to get used to     the control, which was regulated thus--   Right hand works the elevator; left hand works the ailerons or balancing planes, and         also the switch stopping the engines; left   foot works the rudder. After getting some   confidence, and seeing that nothing had   given away, I tried a run downhill, with the

engine well throttled. This time I did not      

do quite so well, for first I swerved to the left, caused by the wind blowing a bit side on, and then right around to the right,

doing a figure of 8. As the ground was a ploughed paddock, I thought the wheels   would have gone, but they stood up all right. The machine heeled very little while       turning round, the speed being about 12 miles per hour. To make things safer, I made a spring skid to go under each wing

tip to check it, should it heel over much. The next trials went far better, for I first ran fast up the hill, when she nearly lifted, and as I now found I could steer straight, I had enough confidence to try fast down. This time she did a bit of a 'hop' when I tilted the front plane up, and steered straight and level. In the next run, the little   wheel under the back, which had never been satisfactory, hit the ground sideways, and all buckled up. The spring fork arrange-  

ment on this wheel also dug into the ground,    

and the run finished with the little wheel scraping along sideways like a disc plough. The only damage done was to the wheel and fork, the former being buckled and the lat-   ter bent. The fork was a motor-cycle one,   so it augured well for the strength of the plane that it was unaffected. To stop this   happening again, I put a long ash skid in place of the wheel and fork, and this seemed   to make the running gear right, for I have had many runs since, and nothing has given way except one wire stay to the propeller blades, which I replaced with stronger

wire."  

The initial difficulties having been over- come, and Mr Duigan having obtained full confidence, he tried a real flight, and on October 7, 1910, succeeded in obtaining a flight of 196 yards, the bottom of the ma- chine being about 12ft. above the ground. Since then Mr. Duigan has been constantly experimenting and making minor altera-   tions and improvements, and altogether has made about 15 flights, some of them over 200 yards at an altitude of about 15ft. He has instituted water cooled heads, made with copper water jackets, and has made a radiator, each tube containing 50 pieces sol- dered together, or 500 in all. The total cost of the raw materials in the biplane as it now stands, with the exception of the engine, is about £75, but this of course does not allow anything for time or travelling. The dimensions of the planes are--Elevating plane 2ft. 6in. x 12ft.; main planes, 24ft.   6in. by 3ft. 6in.; rear plane 3ft. by 12ft.;     rudder, 10 square feet; balancing planes, 20 square feet; wheels and tyres are 26in. by 2¼in. All the wires are piano wire, and   all joints have steel plates top and bottom, with bolts through. All bolts are 3-16in. except the main uprights, which have ¼in. bolts, and the engine is held by 5-16in.   bolts. The total weight, including a 10st. operator, is 630lb., and the area about 240 square feet.

Mr. Duigan's biplane, based on Sir Hiram Maxim's book, resembles Farman's biplane     in some respects, and in many others is quite unique. When one sees the difficulties the surroundings, and talks to the designer and inventor, one realises what it all means to him, and has meant. The biplane as it stands to- day in its shed at Spring Plains is a monu- ment to Mr. Duigan's industry, and as he   moves about among its intricacies of wire and plane one sees that it is alive to him. When, with the assistance of his brother and a handy man, he draws it out of its shed,     and laboriously but tenderly drags it down

a steep hill to the creek, over a wooden plank bridge specially made over the rough   ground a distance of about half a mile, one is more than ever impressed with the diffi-

culties.

On Wednesday morning Mr. Duigan   had a special flight for the benefit of a representative of "The Argus" and "The   Argus" photographer. As we looked at   the flying ground--a flat beside the creek,  

half a mile long, by a quarter of a mile   wide--we were directed by Mr. Duigan where to stand. He has a knowledge of     photography and before mounting to his seat he walked to a spot 150 yards away,      

and, dropping his handkerchief, said "I'll fly over this spot, so you know where to   stand." The breeze was fairly strong from the south-east, rather across the     flight, and blowing in gusts, but this did not deter him. As he walked about, the cockatoo screeched his warning to his fellows again, and seemed indignant that   anyone should trespass on his domain. The cattle, driven off the flat, stood on a     hill near by, until some of them, unable to   restrain their curiosity, ventured back    

again.

Mr. Duigan was lifted in to his seat, his   brother stood behind him and gave the propeller one or two sharp turns, and then stepped clear of the planes. Then there was a whirr of the propeller, and we could see it flashing in the sunlight as     it gained momentum. Then the chocks         which had held the wheels were pulled   out and the biplane bounded forward.     She ran nearly 100 yards, and then, travel-       ling at a speed of 12 or 15 miles an hour, Mr. Duigan raised the elevator, and the     huge machine left the ground. This was         a "hop." She rose about 6ft., and seemed       to be alighting again, when, with another push of the right hand, the elevator went     up again, and the machine rose. She   reached fully 20ft. from the ground, and     as she passed us Mr Duigan could be seen with his machine completely under control. For 200 yards she kept on like     this, flying at a speed of 25 miles an hour, when a gust of wind coming down an     opening in the hills brought her round   towards the creek, and Mr. Duigan       lowering the elevator, she dropped to the ground, and, running lightly for a few   yards, stopped. It was a highly interest- ing sight, but the most emphatic impres- sion was that the machine was quite     under control. The mad rush through   the air was directed, controlled and regu-     lated by the young man who had created       this wonder of the air, who knew every movement of the machine and who ap-       peared to be, not merely the driver, but     the spirit, the whole being of the flight.  

As the machine slowed down Mr. Duigan   leaped to the ground and steadied it. The       cockatoo gave one final screech and flew         hurriedly away, while from their feed-     ing ground,his fellows mounted in a         cloud, and, circling round, crowded into         another dead gum tree half a mile away,       and down the wind came an angry chat-   tering. One wished he could have trans-     lated that bird debate, for without doubt         it was full of protest. Man had for those           birds, once more trespassed! Not content         with interfering with their feeding   grounds, the owners of the station had

entered into a domain previously sacred    

to the feathered tribe. As the machine was wheeled back to its shed, one spec- lated if accompanying the birds' protest     there was not a note of wonder and of admiration.

The flight satisfied the on lookers that Mr. Duigan was quite at home in his aeroplane, and that, given enough power   --his engines are now only 20-horse power --he might accomplish anything.

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