[specter]

which aircraft didnt have radios installed
early models i-16 (which ones)
i-15 ??
polish pz 11c some with/ some without approx 1/3 had
any other aircraft ?

[whiskey111]

In game all aircrafts have a radio. I think radio is not attached to model of airplane.

In reality: some polish older aircrafts didn't have a radio and russians too.

[Guest]

Early-war Tiger-Moths had no radios but provision for Gosport-Tubes, but later they had radios incorporated

[caldrail]

Also, in many cases the radio was not used conversationally. RAF bombers used morse code messages from a dedicated radio operator as a standard practice, though I do note that some clever individuals tuned their radios to German frequencies and gave spurious orders to enemy night fighters in their language. Apparently a German ground controller eventually threw a tantrum over the radio in frustration

[Murph]

Someone more knowledgeable may correct me on this but I thought that most of the Japanese fighter pilots tended to remove the radios from their planes in order to make them a little lighter/more maneuverable. They relied on hand signals between the flight leader and other pilots.