FAI的固定翼分类的小分类

jiaduobao28

FAIFéderation Aeronautique Internationale (french): International Aeronautics Society F1FAI class prefix for uncontrolled models (free flight):

F1A	FAI class for outdoor, free flight glider models.
F1B	FAI class for outdoor, free flight rubber powered glider models.
F1C	FAI class for outdoor, free flight combustion engine powered glider models.
F1D	FAI class for indoor, free flight rubber powered glider models.

F2FAI class prefix for control line models:

F2A	FAI class for control line speed models.
F2B	FAI class for control line aerobatic models.
F2C	FAI class for control line team racing models.
F2D	FAI class for control line fox hunt models.

F3FAI class prefix for radio controlled models:

F3A	FAI class for acrobatic models with combustion engines.
F3B	FAI class for allround sailplanes.
F3C	FAI class for helicopter models.
F3D	FAI class for piston engine pylon racing models.

F4FAI class prefix for scale models:

F4B	FAI class for control line scale models with combustion engines.
F4C	FAI class for radio controlled scale models with combustion engines.

F5FAI class prefix for models powered by electric motors.

F5A	FAI class for electric powered acrobatic models.
F5B	FAI class for electric powered sailplanes.
F5D	FAI class for electric powered pylon racing models.

biomac

好奇F5A这个项目，F3A描述上是内燃机特技模型，然而现在很多3A都用电机了。那么F5A是为了什么呢？

礻申1礻山

没什么具体指导意义啊，比如说函道是什么类。