Model Variants (Including Prototypes)
Tornado - Base Series Designation
P5219 - First Prototype; Vulture V engine
P5224 - Second Prototype; Vulture II engine
R7936 - Production-quality model; extended life as developmental contra-rotating design ith Vulture engine.
R7937 - Production-quality model
R7938 - Production-quality model
HG641 "Centaurus-Typhoon" - Experimental model based on the P5224 prototype; fitted with Bristol Centarus engine.