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Aviation History
1943
1943 - 2785.PDF
NOVEMBER 251H, 1943 5S7 heir Characteristics DH 89 A and 89 B (DOMINIE) FIXED UNOERCARRIACf ' FAIRED INTO ENCINE NACELLES SLAB-SIDED FUSELACE WIRE BRACED TAILPLANE TWO BAY WINCS EQUAL " SPAN INVERTED IN-LINE ENGINES FLAT LOWER CENTRE SECTION DIMENSIONS Span Length Height Wing area 48ft. 34ft. 10ft. 336 sq 6in. 3in. /ft. VERY HICH ASPECT-RATIO •"WINGS DESIGNED primarily for the internal airline operator,the twin-engined DH89A and 89B, which are iden-tical except for equipment, are in service in con-siderable numbers with the -R.A.F. The former is really the civil Dragon-Rapide, which was virtually the standard equipment of Railway Air Services, and is used both by the R.A.F. and the A.T.A. for communications and hSht transport work, while the 89B, or Dominie, is equipped as a wireless and navigational trainer with accommodation lor four or five pupils and an instructor.The " Rapide " was a development of the DH 84 Dragon and was first introduced in i934- " proved an "°mf°*gsuccessful aircraft, for it carried eight to ten Passengers at a useful speed for very low operating cost, and hundredswere built for almost every country in the world P™ereQ by two inverted, air-cooled Gipsy Six Series I engineseach of 200 h.p., it has a' top speed of 157 mf-*\' *"o cruises at 132 m.p.h. on a fuel consumption of only 18 g.p.h. Like its bigger brother, the DH86, the DH89 did not boast flaps when first introduced in the days of peace, but both the 89A and 89B are now equipped with these aids to steeper and slower final approaches and land- ings. An equal-span biplane, its two-bay wings are of veryhigh aspect-ratio and, as on the " eighty-sixes," the outer inter-plane struts are single. But it differs in wing planfrom the four-engined machine in that its wings are not backswept. The tail units of the two types are to allintents and purposes identical in form except for .the auxiliary endplate fins on the 86B.Another feature characteristic of both types is the fixed undercarriage, the fairing of which may be described as ;>downward exteusidn of the engine nacelles. The much slimmer and shorter nose of the DH 89 type accommodatesonly one pilot, but the general lines of the two types ar» so similar that they are obviously " stablemates."
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