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Hot weather will continue for several months,--Official
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[105
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FLYING AT HOME
FIRST LIGHT AEROPLANE CLUB,
I
1925
ACROBATS OF THE AIR.
THE THRILL OF WATCHING AERIAL ^WIZARDS."
batics.
[DY HARRY KARPKE.}
STORAGE OF CEMENT.
RATE OF DETERIORATION.
As the rest of tests farried out over a period of several years by the Structural Materials Research Laboratory, Chiengo, the rate of deterioration of cement, with
storage has been determined. The cement
be used by a contractor, and tests taken was stored in bags such as wook.
orerin period of two years. Taking the relative strengths after periods of three, original compressive strength as 100, the six, twelve, and twenty-four months were 60, 79, 60, and 40 per cent respectively so that after two years storage the strength was reduced to less than one-half on the other hand, it was found that con- creto made with such deteriorated cement improved with age. Thus cement after three months' storage was used for a con- crete which after seven days gavo 73 per
NEW HIGH-SPEED FILM.
5.000 PICTURES A SECOND.
The Landon Aeroplane Club, an of
cinematograph machipe capable of shot of the Royal Aero Club, was opened taking 5,000 pictures, a second, making recently, by Sir Philip Sassoon, Underit possible for the human eye to observe Secretary of State for Air, at Stagelane the night of a rifle bullet, the process
A sea of sagar faces, gazing skyward, Aerodrome, which is close to Harnt Oak of an explosion, or the impact of n
was watching the other day for the first Station, on the Edgware Tube. After shell on armoured plate, is in us in formally declaring the club open, Sit this country, states the Central Neur time a succession of aerial marvel which Philip was the first passenger on a club This machine the Heape and Gryles targed new pages in his history of zero As those throngs, Amazed that anyone aeroplane, one of the two De Havilland Rapid Cinema inachine was manufac
tured at York Involving a great deal Bloths with which the London Aeru research and perimental work, it aloft in a winged machine should be plage Club begins work. His pilot was was not completed for four years
able to achieve such evolutions, left the Mr. F. G.M. Sparks, one of the two in. Slow motion &lms, with which the nerodrome at the end of the display the structors who have been appointed to public are now familiar, are taken at questions one heard them asking each teach dying to members of the club the rate of about 160 pictures per second, other wore: How can meu teach them
There
are about 100 members, and and projected at sixteen, thus allow selves auch tricks How can they admission is for the present refused to ing the observer ten times as long to
learn these things with such uncanny a couple of hundred applicants for the wee what actually happened, By using skill How is it that they do not simple reason that the prescut flying the rapid camera machine shell tra equipment would be insuficient for them. Welling across a definite space at the fall to death long before they have mas This is a situation which it is hoped will rate of 1,000ft, per second can be phota tered these dizzy twirls and dives? Frent, of the strength of concrete made The answer lies in one ward-height with fresh cement: After twenty-eight soon be remedied. In the meantime aphed, and if the film be projected.
on the screen' at the normal rate it That sheer gap which lies between the days, however, the figure hail increased. flight taition has begun on the two will be seen as though it were travelling whirling plane and the earth below, and to 78 per cent. Cement after a much Moths and on the opening day there the same rate as a person walking which seems it a ginues to make for the longer storage showed a much more re- were fifteen members on the ground at about two miles per hour.
direst peril. is in fact the master,pilot's finarkable recovery. It thus appears that enger to begin. To decide priority a Remarkable experimental pictures safeguard. It is his insuranes against cement damaged by storage is slower ballot was taken, Sir Philip Sassoon which were taken by the machine threw disaster. It gives him latitude for errors in hardening Qan a fresh rement. drawing the names out of a hat, the first an interesting light on physical pro which, being huntar, he must make again These results are of considerable in. drawn being that of Mr. E. D. Kittel, bless. The actual phenome of an ex- and again before he has added some new terast. They affect the purchaser who who, with the other club instructor, Mr. plosion were observed for the first time.
trick to his repertoire.
may find it necessary to buy a large The explosion was "ataged" inside an G, T. Whitcomb, went up for half-an incandescent lamp, vnptied of air. There is danger in flying low, safety amount of cement for reasons of economy, hour's tuition, being followed by the other pupils in the order of the draw. After it had been ignited by an electric flying high. Such the law of the and to use much of it only after a period
spark the explosive material was soon | air.
of storage. They also have a bearing on visibly to swell and then burat its bonds. And so the flying acrobat goes zooming the purchase of cement for everseas use. Another picture was taken of the break and soaring upward, gaining the remote. It is, however, of interest to learn that | ing of a glass vacuum globe by a swing. ness of some lofty, lonely sky-space before,storage is accompanied by a smaller dei, jug hammer. This illustrated the burst painstakingly, he sets himself to studygree of deterioration if the temperature ing of that part of the globe opposite
of the cement is somewhat raised during that hit by
a new piece of aerial magic. the hammer, the
the period which clapses hetween produe- first perforation of that part of ** JUST-FELL, OUT OF IT." tion and use, ansl further, that when stor In his inaugural speech Sir Philip said the globe being brought about by
Pilots themselves have coined an ex.ed in mass in bins cement shows Ettle or that there had been doleful forecasts on pieces of broken glass caught up hypressive phrase in describing their early deterioration. after a period of even the subject of light aeroplane clubs. the inrush cf air through the hole failures to accomplish seras fresh and one and a half years, Certainly there have been many difficul-made by the hammer, and hurled across difficult font ties that at one time seemed insurmount the globe. It is thus evident that when
air beneath him. the pilot is unperturb able, but they had been surmounted. 4 swinging hämnier înlla ngaiost - the All concerned are to be congratulated," glass globe it does not at" once crash
ed He allows that machine to fall. Ha permits it gain momentum. he said, for having won for London into it, but as it falls against the glass
And then, just at the precise moment which the arst Light Aeroplane Club in, this sisting Fracture until the push overcomes
experience dictates, he works deftly at it first pushes it inwards, the glass, re- country, the precursor, I am sure, of many the resistance. In another picture it was, is obviated by his being strapped Bently his levers, and, by movements which are aeroplane clubs all over the country and demonstrated by firing a ball against in his driving-ait. What he does can quick but never abrupt, converts that un which are..destined to establish lying target that a solid rubber ball under is that, at some point during a compli controlled fall into 'n steep but controlled- as a popular and legitimate sport. You the influence of a vinlent biow appears cated manoeuvre, his machine lost speed dive, and then checks this dive until can rely upon the Air Ministry for sym--to behave in a similar way to a child and, after almost standing still in the he is moving horizontally. After which, pathy,, and also for practical assistance lightiy-struck balloon or to NOMES- within limits. We have never pretended bubble in a draught of air. It would, simply toppled over to a pell-mell with a conelt upon his engine throttle, no nor hoped to carry these clubs on our seem that the use of super-rapid photo-
regains his lost height and begins lent graphy in physical research is only in height. Were that craft, its wings no ale: the earth.
And here comes the saving grace ofing that trick again, thousands of feet its infancy.
longer lifting, near the earth when it began its fall, it is probable that it woul! crash disastrous before its cupant could regain control. But knowing he has plenty
ing.
The club is open to both sexes," and there are already five women members we are to be taught to By, and six a
Rociate women, members,
backs."
A NATION OF AIRMEN,
The clubs, Sir Philip continued, would help to build up a big reserve of pilots. by popularising flying by developing that
air sense they were looking forward to
would come into its definition of light aeroplane." Experts are agreed. how. achieving so that we could become a ever, that consistent with safety a two nation of airmico. The light aeroplane senter machine must not have in engine clubs would help them to realise that of much less power than the "Cirrus." Lideal. He congratulated all concerned
with this amovement on trying to win away the aeroplane frate its associations with war and to make it a powerful agent for civilisation and peace.
Lieut. Colonel F. McClean, Vich-Chair man of the Royal Aero Club responded in the absence of the Duke of Suther land who had intended to be present but was abroad, and who sent a telegram of congratulation and good wishes. Colonel McClean remarked that the help the clubs were at present receiving from the Air Ministry was barely sufficient, but that in London, with good luck they might scrape through.:
Among those present were the com- mittee of the new club, namely, Lieut.- Colonel F. McClean, Colonel the Master of Sempill, Captain C. B. Wilson, Wing- Commander T. O'B. Hubbard, Major I. H. Mayo, and Mr. II. E. Perria. Air- Comnfodore Sir W. S. Brancker and many Service and civilian pilots were in the aerodrome. Several machines were in the air, among them a "Moth," on which Captain H. S. Erond performed a series of stunts to demonstrate its manage nbility..
CLUB COLOURS.
The two London Club Moths are painted light grey: Also on the ground were a Miḍand club's machine, its use lage painted olive green, and a Lanca shire Club's machine, its fuselage paint- ed dark bite. A machine for the Leeds Club with a light blue fuselage was down to Leeds on Tuesday. The colour chosen for the Newcastle Club'is red. A private owner is having the fuselage of his machine painted maroon. An American millionaire has bought a Moth acro- pinne this week, and several are an order for Australia, these all being silver hued, but with red discs, to their landing wheels. Incidentally one saw. d. new DH61, with an Airdisco engine, being finished off for Mr Carbery, „a well- } known pre-war owacf-pilot..
In addition to the club subscription, inembers of the London Aeroplane Club. who take lessons in flying pay at the rate of £1 10s. per hour in the air. It is extimated that ten hours should be ample for complete instruction qualifying the pupil for his certificate, and for each certificate gained by members of a club the Air Ministry pays a grant of £10, The Air, Ministry further helps, the ap poved clubs with equipment and financial assistance provided ccrtain standards are maintained. The club members, who are thus enabled to learn to fir at an- un- precedentedly small cost, require an art not only of value for its own sake but of national, importance, and of possible commercial value to themselves.. The De Havilland Moth type of machine," with its 80 hp, "Cirrus engine, manu factured by the Aircraft Disposal Co., is at the moment the most suitable craft for club purposes; but, it is well known that the Air Ministry desires to encour age the development of a type which (Continued on next Column).
|
i
I just fell out of it one of thein will say.
41
By this he does not mean, of course, that he actually parted company with his craft in mid-air. Any risk of that
̋ ነ! J
There is no thrill subtler than to watch
one of these aerial wizards at work higla aloft in wind-swept sky. The spectacle delights, the eye. It challenges and stimu of empty lates the mind. It is man's conquest of
the air epitomised.
(Cantinued on next Column),
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