@BinarySunset made a simple flight control on main wing for it.And he meet a problem with the flight control of the horizontal tail.(PID control)

Repaired version with antenna

Blue version without flight control here

Blue body and green nose with flight control here

Control

AG-1 for air brake
AG-2 for parachute
AG-8 for light
VTOL for flaps(the blue one has)
Trim for trim

Introduction

The Su-27 (NATO name: Flanker) is a third-generation, single-seat, twin-engine all-weather air superiority heavy fighter developed by the Sukhoi Design Bureau of the Soviet Union. The main tasks are territorial air defense, escort and maritime patrol
The Su-27 fighter jet adopts wing body fusion technology. It has a single cantilever wing in the middle, a smooth curved strip wing outside the wing root, and a double vertical tail in normal layout. Wedge inlet is located in front and below the wing body fusion body, which has good aerodynamic performance. Full metal semi-hard shell fuselage, nose slightly down, a large number of titanium alloy, traditional three beam wing, four redundant telex control system, no mechanical backup, static instability design.

Glad to receive suggestions about building a better body.

Enjoy your flight.

Thank you for your upvote and spotlight.