Sobre os Su-27 angolanos só descobri isto:
"Military developments
Government military preparations
The government announced many times the imminence of what was then called the dry season offensive. However, difficulties with the recruitment, delays in the delivery of new equipment and low morale of the troops, forced constant postponements.
During the special Central Committee meeting - Aug 25-28, a definitive decision was taken by the political leadership to launch the attack regardless of the season. What is new?
A total of eight Russian made jet fighters, SU-27, were delivered and transferred to Catumbela, the main airbase in the central region. Another seven are believed to be in the pipeline.
Angolan pilots have just come back from conversion courses in Belarus. Some Ukranians are also reported to be providing back up support to the pilots.
Night vision flying equipment was purchased with the aircraft and training conducted in Luanda.
About 70 new tanks - T72 and T54 - were purchased. Two thirds of them, mainly the T72, are already in the country. The other third is to be delivered "soon".
Radar systems were deployed in seven key locations - Catumbela, Huambo, Cuito, Saurimo, Malange, Luena and Menongue - throughout the country. This was done to obtain maximum coverage of the country to intercept adverse aircraft and provide support to the newly acquired SU-27."
Pedro Figueiredo