The Focke-Wulf Ta 152S was a planned two-man tandem trainer version of the Ta 152, which was ordered into production but never delivered.
The Ta 152S-1 was to have been a two-seat trainer similar to the Fw 190A-8/U1 or Fw 190S-8. It was to be converted from standard Ta 152C-1 airframes, with the DB 603 engine. A fully equipped second cockpit was to have been installed behind the normal cockpit, but no guns were to have been carried. In the circumsantances of 1945, when this aircraft was to have been delivered, this is an odd decision, as Allied aircraft were already ranging all across Germany. However the entire plan was impractical – production was to have begun at Blohm & Voss in April 1945, by which time their factory at Hamburg was about to fall to the British, and at Lufthansa in Prague in August 1945, three months after the city was liberated! A total of 565 aircraft were to have been delivered by March 1946, of which none were completed.
The Ta 152S-2 would have been similar to the S-1, but based on the high altitude Ta 152H, with the same long wings. It isn’t clear if it would have had a pressurised cockpit – the single man canopy on the standard H-1 was unreliable and poorly sealed, so a longer version would have been very difficult to produce. It never got beyond the design stage.