Vickers Vellox G-ABKY side view
A side view of the Vickers Type 212 Vellox derived from the Vickers Vellore III.
The sole Vickers Type 212 Vellox was modified from a twin-engine Vickers Vellore that was already under construction at Vickers-Armstrong.
The main change was to enlarge the fuselage to carry passengers, rather than be restricted solely to the carriage of freight. The wings and tail unit of the Vickers Vellore were retained, but the engines were changed to a pair of supercharged Bristol Pegasus IM3 engines.
The cabin was sized to suit the carriage of ten passengers (or 3,000 lb of freight) with two flight crew and a cabin steward. The prototype (G-ABKY) was first flown on 23rd January 1934, at Brooklands, flying again later the same day, at its maximum design load. Just two days later, it was flown to The Aeroplane and Armament Experimental Establishment (A&AEE) at Martlesham Heath, to conduct civil type tests.
The Vickers Vellox had a comfortably equipped cabin with soundproofing, ventilation, galley and toilet, while the airframe itself was provided with inertial engine starters, brakes, electrical instrumentation and an experimental de-icing system on wing and tail surfaces.
Vickers Vellox G-ABKY rear
The Vellox prior to delivery to Imperial Airways, who used it briefly as a night freighter.
The only change incorporated after the type trials was to fit four-bladed propellers to reduce vibration when in the cruise. The aircraft was sold to Imperial Airways in May 1936, but it was somewhat ironically, only used by the airline to carry night freight.
This restriction was reportedly due to the type’s low cruising speed. Vickers-Armstrongs view however, was that the reduction in performance compared with the results of its Martlesham Trials, was due to the weight and drag of additional equipment fitted by the airline.
Two Bristol Pegasus IIL engines were fitted with a view to improving performance but the aircraft was destroyed following a night take-off crash at Croydon on 10th August 1936.

Variants & Number Built

One aircraft only.


Two 600 hp Bristol Pegasus IM3 engines
76 ft 0 in
Maximum Weight
13,500 lb
Two flight crew, cabin steward and 10 passengers or 3,000 lb cargo
Maximum Speed
157 mph at 6,500 ft
Cruise Speed
130 mph
690 miles




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