I'm going on the basis of most of history happening as was.
Country D's greatest impact is in its region.
The 'liberation' of Madagascar from the Viche regime and returning the Merina Kingdom. Though France engineers a South Madagascar state that quickly falls to a Communist revolution. Later followed by the Kilwa Sultanate (Maputo in southern Mozambique).
Furthermore the independence of Natal and with it Zululand.
Also the support of Ethiopia against European powers.
Good points on state of aircraft designs at the time. I'm working on the pressure to develop this aircraft is the mid 50's as that's when Canberras are being released and the Valient is operational.
Uk backing of Country T (the southern part of the island continent) as colony and then ex-colony is as much of a threat as Communists or the French. Even they ended up as allies during WWII.
I'm working on the idea they have licence built centrifugal jets.
So while some Germans might be involved, but this country has the educated population to resource personel for the task.
Certainly would be interesting if say the 35' diameter proved a successful engine. If say this was exported and licensed to India for example especially if this is used in the Marut.
