It would've been powered by a pair of Merlin engines in pusher configuration located in the wings, in order to allow the gunner a good field of fire, as his turret couldn't turn 360º and the guns couldn't be lowered into horizontal.
This was Armstrong Whitworth's first project which hadn't fabric-covered surfaces, using stressed skin light alloy construction being used throughout and was also the first one to have a tricycle undercarriage complete with a steerable nosewheel.
The two petrol tanks were going to be located just behind the turret, in the upper part of the airplane. A bomb container and a rack were also going to be placed in a lower fuselage bay behind the turret with a capacity for 250lb of bombs (113Kg)
Sources:
1. Midland Publishing - British Secret Projects 1935-1950 - Fighters and Bombers
2. http://www.secretprojects.co.uk/forum/index.php/topic,10408.0.html
