Originally Posted by
bobward
I think the larger 'hole' is for the gun camera. The smaller hole, between the guns, is where the arrowhead antenna for the early versions of AI radar was fitted om night fighter variants.
Maybe this was a common fitting/access point on all the fighter Mosquitoes?
The first generation Mosquito night fighters had AI Mk IV/V Longwave Radar, the forked aerial for that was fitted between the barrels of the four machine guns and more aerials on the wings. Cannons were in the belly.
The second generation NF Mosquito's had AI XII/XIII Centimetric Radar and the machine guns were deleted and the nose now housed the radar dish scanner. Only the four cannons installed.
The third version had AI X which was the american produced AI Radar and this used a larger scanner and the nose shape changed to a more bulbous style, again just the four cannons.