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Aviation History
1929
1929 - 0322.PDF
FEBRUARY 14, 1929 A REALISTIC MODEL Some Further Notes and a New Type IN our issue for December 13 last we described and illustrated a model monoplane produced by A. E. Jones, Ltd., of 97, New Oxford Street, W.C.I, and referred to a parasol type that was under way. This week we are able to give an illustration of this new model, " Zephyr," together with a few notes as to its qualities. Constructionally, it is identical to the model previously described, except for the wings and one or two refinements, resulting from the tests we had the pleasure of carrying out with the first model. The wings are in one piece, 24 in. span, with a dihedral angle, and are mounted above the fuselage on a wire cabane of four inverted Vs. The latter receive fore and aft wire projections on the wing, which slide within them so that the position of the wing as regards distance from the nose of the fuselage may be varied through half an inch. Two locking screws on the forward wing supports secure the wings in the desired position once this has been ascertained. Another modification consists of a positive adjustment for the tail plane. This, together with the rudder, is rigidly bolted on the fuselage at the forward end, but projecting below the centre of, and attached to, the tail plane is a short length of wire, which slides within a lug attached to the stern post of the fuselage as the tail plane is raised or lowered. A small locking screw on this lug locks the wire in the lug at any desired adjustment of the tail plane. Both these adjustments of wings and tail plane are important features, for we have found from our flying tests with both types that they are very' " sensitive on the controls "—but once the correct adjustment has been found they fly remarkably well. They are, in fact, " realistic " not only in appearance, but in performance also. In this respect, therefore, these models, while not giving the performance as regards duration and distance of some models—which by no means resemble a full-sized machine in appearance—provide much interesting study during flight. As regards the parasol model, we have found that this is perhaps more easy to fly than the other, and is less particular in the matter of wind gusts. This, of course, is due to the fact that it is of larger span and is not so heavily loaded. The performance of the first model, however, has been improved considerably since our last report, and this has been achieved by the fitting of different wings. These are now of slightly larger span with reduced chord, so that while the model is still—in comparison with the " parasol "— a fairly speedy and sensitive flyer, it appears to be more stable than before. This question of wings brings us to a feature of these " A. E. J." models worth bearing in mind. Having, to start with, an exceptionally strong but light fuselage, efficient motor, sturdy undercarriage, and tail surfaces of ample proportions, it is a very easy matter to experiment with different types of wings, which can be constructed to one's own ideas around the very simple mounting arrange- ment provided on the fuselage, while the substitution of different airscrews and motors is also an easy matter, especially if one is provided with a supply of spare spindles and " engine mounts." Thus, we look at these models in the light of something more than mere toys—although even as such they constitute strong, well-made ones capable of providing plenty of fun— A REALISTIC MODEL : Some constructional details. (1) and (2) The adjustable wing attachment ; the wing can slide fore or aft in the " cabane " and then be locked in position by two screws. (3) The detachable aluminium *• engine mounting " (carrying the air- screw) is locked in situ by a wire clip, A. (4) The angle of incidence of the tail plane can be adjusted by the locking screw mounted on the fuselage. but think they have some real scientific value. Anyway, we congratulate Mr. A. E. Jones on his efforts. In conclusion, we would very much like to receive " Flying Reports " on these models from any of our readers who may happen to possess one, and would also like to give a little bit of advice to " Zephyr " owners—and that is, if they do not get good results at first, not to be disappointed, but experiment carefully and slowly so as to get the " knack " of launching and adjusting, for, as with nearly all model aeroplanes, this is very important. A REALISTIC MODEL : On the left is the new parasol-type model produced by A. E. Jones, Ltd., which has remarkable flying qualities. The other illustration shows the improved two-piece wings (incidentally, mounted on the " parasol " fuselage) now fitted in the first " sporting " model previously- described in " Flight." %:~'-l ••• 126 . ' :
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