J'ai testé, ça marche :
Follow instructions:
1) Enter in DCS and click Options
2) Click Special and select MIG21
3) Check > Simplifiel Engine,Prevent canopy,custom cockpit > and click OK.
4) Return on Desk DCS
5) Click Option
6) Special and select MIG21
7) Remove check>Simplifiel Engine,Prevent canopy,custom cockpit > and click OK.