Hi KitS were these PR9's conversions from the Bi 8's? (BI = bomber interception) I say that as many Canberras including the early PR's had the tandem wide canopy. I used to work on the Bi 8s on 59 squadron and I will always have a soft spot for them. They had the off-set canopy, I sat in many a one as I did the air radar equipment servicing. In any kind of sunshine the heat inside was oppressive. My own little pleasure was marshalling them in onto their spot on the apron after night flying.
Some early ones were built by CIA with greatly extended wings and used prior to the U2 spy plane. I did like the B57 American version.
regards Roy
No Roy, the PR9s were purpose built high altitude versions, and all were built by Shorts at Belfast. They had extended chord wings inboard of the engines and much more powerful Avons as well as powered ailerons and rudder, thus the need for my sampling valve on the hydraulics.
While the B(I)8s had an offset canopy it wasn't the same as the PR9s. On the B(I)8s the canopy didn't open and access was via the normal Canberra starboard side door, whereas the PR9 canopy opened up as you can see in the pic I attached.
The poor old Nav in the PR9s sat right in the nose behind a sideways opening door, a place usually called the 'Coal Hole' as it only had two tiny windows at shoulder height and suffered greatly from too much or too little heat as the heating controls were up in the pilot's cockpit!
Those US high altitude Canberras looked awesome with the huge wings. The early ones were RB-57Ds with either a tandem two seat canopy or a single seat one, but suffered from weak wing spars and many failed just outboard of the engines. They were flown by both CIA and USAF crews.
The latter ones were RB-57Fs with even LONGER wings, and massive TF-33 engines. After service with the USAF some went to NASA and three of them are still flying! One was over here, based at Mildenhall for a bit, only last year.