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Aviation History
1934
1934 - 0707.PDF
JULY 12, 1934. FLIGHT. 709 to be substituted for the fixed undercarriage when desired. When this is done, the-machine becomes the "S.T.11." GENERAL AIRCRAFT " S.T.10." Two POBJOT " NIAGARA " ENGINES, 90 H.P. EACH. Span 40 ft. 2 in. (12,2 m) Aspect ratio ... ... ... ... 7.4:3 to 1 Wing area 217 sq. ft. (20,2 m') Gross weight 2,550 lb. (i 1-56,7 kg) Tare weight 1,470 lb. (666,8'*») Wing loading 11.75 lb./sq. ft. (57.J frff/«i") Power loading U.16 Ib.jh.p. (6,4 kg!hp) HENDY "HECK" AND "HOBO" Built for Mr. Whitney Straight, the "Heck" has already been given a good deal of publicity, as it is a special job for this well-known racing motorist, who wanted to have a machine which would enable him to get about between motor races, both on the Continent and in this country, in the shortest space of time. Mr. B. B. Hender- son has, therefore, taken considerable trouble to ensure a very high cruising speed together with a comparatively low landing speed when designing this machine. The "Heck" is a two-seater tandem cabin, low-wing monoplane designed with the well-known " Hendy 302" as a basis. Features which separate the "Heck" from most other machines are the use, not only of a retractable undercarriage, but also of slotted flaps and deeply filleted wing roots. The undercarriage is of the type which, by means of worm gearing operated from the pilot's cockpit, is swung outwards up into the wing, and disappears com- pletely in the retracted position. The shock-absorbing leg, which incorporates two compression units, has been de- signed by Mr. Dowty, of Aircraft Components, Ltd., and, despite the small space into which the undercarriage has to be stowed, it has been possible to allow a travel of gin., a factor which permits better use of the slotted flaps than is generally the case. The flaps run the whole length of the trailing edge of each wing, and the outer sections are used as ailerons. When the inner sections are depressed, they are followed at a lesser angle by the outer sections, which, however, retain their full efficacy as ailerons. HENDY " HECK." D.H. " GIPSY SIX," 200 H.P. ENGINE. Span 31 ft. (9,4 m) Wing area 150.2 sq. ft. (13,9 m1) Gross weight 2,400 lb. (1 088,6 kg) Tare weight 1,520 lb. (089,4 kg) Wing loading 16 lb./sq. ft. (78,1 kglm') Power loading 11.7 lb./h.p. (5,3 kgjhp) SLOTTED FLAPS : Mr. Henderson achieves a low landing speed on the Hendy "Heck" by means of slotted flaps, the outer portions of which are the ailerons. The " Hobo " was one of Mr. Henderson's earliest efforts, and when originally designed was fitted with the A.B.C. "Scorpion" engine of only 35 h.p. For the race a new Certificate of Airworthiness has been granted, allowing the use of a Pobjoy "Cascade " engine, and in this guise the performance should be quite out of the ordinary. The machine is particularly robustly constructed, with a" three- ply covered fuselage, and has a very wide undercarriage. Although only a single-seater, its performance should 1)3 sufficiently high to give it a wide appeal amongst sporting pilots who like to have an open machine solely for the pleasure of flying. Constructionally, a definite family like- ness can be traced from this machine via the " Hendy 302 " (which, incidentally, was first produced as an open two- seater machine, and only had a cabin top fitted after it was acquired by its present owner, Mr. C. S. Napier, Tech- nical Director of the Cirrus-Hermes Engineering Co.) down to the Hendy "Heck." Mr. Henderson has consistently got just a little more out of his machines than has generally been expected, so both the " Heck " and the " Hobo " may be counted upon as possible "dark horses" for the race. The "Heck" has been built under the direction of Mr. Henderson in the Westland Aircraft Works at Yeovil. MILES "HAWK" In last year's race Wing Com. Probyn started as one of the strongest favourites in a very attractive-looking Mile- "Hawk," a machine which had at that time just started in production in the works of Phillips & Powis, Ltd., at Reading, whom Mr. Miles had joined as designer. Unfor- tunately, Wing Com. Probyn, when doing extremely well, lost a push-rod from his engine and had to retire. MILES " HAWK." D.H. " GIPSY III,' 120 II.P. ENGINE. Span 33 ft. (10,1m) Aspect ratio ... ... ... ... 6.6 to 1 Wing area 169 sq. ft. (15,7 m1) Gross weight 1.S00 lb. (816,5 kg) Tare weight 1,085 lb. (492,1 kg) Wing loading 10.6 lb./sq. ft. (51,7 kglm') Power loading 15.0 lb./h.p. (6,8 fry/Ap) This year there are three versions of the " Hawk " in the race. One flown by Mrs. Patterson is a standard machine with a "Cirrus III" engine; the second is fitted with a "Gipsy III" engine, and has a full cantilever, single-strut undercarriage. For the race it is, of course, a single-seater, but with the front cockpit "opened up" it is the forerunner of the "Hawk Major," a drawing of which appears in this issue, and which is about to be launched on the market by this firm. In the race this "Gipsy III" engined model has been entered by Capt. G. R. D. Shaw, and will be flown by Mr. Tom Rose, the instructor of the Northamptonshire Aero Club, at Sywell. The third machine is a "Hawk," similar in most respects to the "Gipsy III" model, but having instead a "Gipsy Six " engine of 200 h.p. It has been built as a high-speed machine, having a particular appeal for racing. The en- trant, Sir Charles Rose, will fly it himself. The loading,j with this engine, remains just about as in the standard "Hawk" when carrying a pilot and passenger, so the landing speed should still be very low, but naturally with the increased power a high top-speed performance is expected. It is a tribute to the robustness of the " Hawk " that very few modifications in the way of strengthening have been found necessary for it to get its Certificate of Airworthiness. MILES " HAWK." D.H. " GIPSY Six," 200 H.P. ENOIXE. Span 33 ft. (10,1 m) Aspect ratio ... ... ... ... 6.6 to 1 Wing area 169 aq. ft. (15,7 m') Gross weight 1,900 lb. (861,S kg) •'••• Tare weight 1,355 lb. (614,6 kg) Wing loading 11.3 lb.Mq. ft. (55,2 kglm*) Power loading 9.2n lb./h.p. (4,2 kg /ftp)
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