Vickers Type 212
Vellox

A transport aircraft prototype, developed from the Vickers Vellore III.
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 Vellore (described separately) that was already under construction.
 
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 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 Martlesham Heath to conduct civil type tests.
 
The 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 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 company 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 & Numbers

One aircraft only.
 

Specification 

Powerplant
Two 600 hp Bristol Pegasus IM3 engines
Span
76 ft 0 in
Maximum Weight
13,500 lb
Capacity
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
Range
690 miles
 

Survivors

None; aircraft destroyed in an accident during August 1936.

Other information

www.brooklandsmuseum.com