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How many Canadian Sabres did the RAF receive around 1950?
Short answer
The RAF received 428 Canadair Sabre Mk 4s, designated Sabre F.4, plus three more from a batch built mainly for the RCAF. Of the 438 Mk 4s, around 70 were temporarily used by the RCAF before all survivors passed to the RAF. They arrived under a mutual aid programme and equipped eleven British squadrons.

An order for 438 aircraft
Of the 438 Mk 4s built, around 70 were temporarily operated by the RCAF, and all surviving examples were transferred to the RAF. The remaining Sabre 4s went directly to the RAF under a mutual aid programme and equipped eleven British squadrons. In British nomenclature, 428 aircraft went to the RAF as the Sabre F.4, against ten built for the RCAF. A separate batch, with 287 aircraft for the RCAF and 60 for the USAF as the F-86E-6, also contributed three units to the RAF.
Return and new destination
Between 1956 and 1958, 302 RAF Sabres were overhauled and modified in the United Kingdom and returned to the United States government, which together with the Canadians had funded the aircraft under the Mutual Defense Aid Program. They came back in camouflage colours and with Canadian serial numbers, redesignated F-86E(M). Of that total, 121 were sent to Yugoslavia and 179 to Italy.
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