It could have worked. Anyone remember the Biafran Airforce?
The following is from a comment on the recent air raids in Sri Lanka by the Tamil Tigers:
"Swedish aviator and adventurer Carl Gustaf von Rosen entered the war on the Biafran side, but the only aircraft they could afford to counter the Nigerian Air Force, equipped with the latest Soviet bombers, were MFI-9s - tiny Swedish trainers. Equipped with light rockets, the MFI-9s did not cause major damage, but flying from tiny jungle airstrips, they destroyed several Nigerian jets on the ground. With better weapons and tactics, they could have been more successful, though.
The Biafran “air force” proved almost impossible to destroy, however. Flying from improvised airstrips, and moved by trucks through jungle tracks, they could not be found from the air. They flew too low to be hit by anti-aircraft weapons, and small-arms fire tended to go straight through the aircraft without causing major damage."