"MiG-33" and Yak-43

Does anyone have more information about these (unrelated) Russian fighter projects of the 1980s? This is all I’ve found so far:

Mikoyan Product 33

Crew: One
Engine: One RD-33 turbofan of 81 kN
1980-1986. Planned as a MiG-29 class fighter mainly for the export market to replace MiG-21.

Yakovlev Yak-43

Crew: One
Empty weight: 18,000 kg
Engine: One Kuznetsov NK-32 turbofan of 245 kN
Planned as a next-generation STOVL fighter to succeed Yak-41. Improved aerodynamic configuration with LO features and RAM. The engine would have combined the functions of lift and cruise. Front- and rear-looking radars. Weapons were to be carried in an internal bay.

The following is said to be a three-view of the Yak-43. However, the Yak-43 is sometimes said to be quite stealthy, but in the drawing it doesn’t look like that. :confused: