The terminology suggests a specific set of competition regulations (rules) rather than a scientific research paper. In aeromodelling, "Class A" traditionally refers to specific categories of models, most notably Free Flight power models or specific RC Aerobatics categories, depending on the era and organization.
If "Class A ver.00" refers to a specific model plan called "Class A" (common in the 1940s-60s for free flight), you may be looking for a plan by a designer like or Walt Mooney . MODEL CLUB CLASS A ver.00
"Class A" and "Club Class" are frequently used to describe luxury tiers in transportation: The terminology suggests a specific set of competition