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Aviation History
1952
1952 - 2392.PDF
236 FLIGHT BRITISH AIRCRAFT military Power plant Span Length Height Wing area Rolla-Royce Merlin 35 39ft 4in .. 35ft ijin 12ft 6in 250 »q ft Jfoifftotl #Vfl«# Hffilial ORIGINALLY designed as a three- seater, with an Armstrong Siddeley Mamba turboprop, the Balliol is now being quantity-produced as a two- seater with the Rolls-Royce Merlin 35 piston engine, in which form it is designated Balliol T.2. Its naval counterpart, die Sea Balliol T.21, is generally similar—i.e., it is a folding-wing machine, with the crew of two seated side by side beneath a broad canopy—but differs in having special naval equipment. This includes an arrester hook, redesigned under carriage and tailwheel units, and an airscrew of smaller diameter. It is claimed that the control characteristics of the Sea Balliol at low approach speeds render it particularly suitable for deck-landing instruction and practice, while the air brakes enable it to be used for training in a low-level bombing attack. These brakes restrict the terminal velocity to 350 m.p.h., though without them a Balliol has been dived to over 450 m.p.h. Blackburn G.A.L.OO IN the two previous S.B.A.C. Dis plays this unique military transport prototype has impressed with its vast stowage capacity and apparent docility in handling—a "gentle giant" indeed. The Mk 1 version, as now flying, is powered with Bristol Hercules engines and was designed for a gross weight of 105,000 lb. Being intended particularly for short- range operations from secondary airfields, it has the very moderate wing loading of 36 lb/sq ft, but due largely to the effectiveness of the reversible-pitch airscrews, the wing loading in the forthcoming Mk 2, Centaurus-powered version can be increased to 43$ lb/sq ft without sacrificing the desirable features of the original model. Except that the rear fuselage and ramp will be replaced by a tubular boom and new "clamshell" doors with removable ramps will be installed, the Mk 2 will be generally similar in construction to its predecessor.
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