Minor tweaks to Gareth's Mig 21s.
Details.
Mig 21F-13/ early J7:
No brake chute, one piece canopy, tapering intake, small radar & no external pylons
Mig 21 PF, FL, PL
Halfway spine tank, one piece canopy, & no external pylons
Mig 21 PFM, PFL
Halfway spine tank, two piece canopy, & no external pylons
Mig 21 SMT
Bulged spine tank
Late J7, J7I, J7II
Brake chute, two piece canopy, tapering intake, small radar & no external pylons
J7M, J7E, J7P, J7M
Brake chute, two piece canopy, tapering intake, small radar, top position pitot tube & external pylons (not for missles)
J7MP
Brake chute, two piece canopy, tapering intake, small radar, top position pitot tube & external pylons for missles
J7EB, J7G, J7PG
Double delta wing, brake chute, two piece canopy, tapering intake, small radar, top position pitot tube & external pylons for missles
J7III is a copy of the Soviet Mig21 MF