The S-1 had a top speed of 379 mph at 26k, powered by 2 BMW 801G-2 engines both with GM-1 boost they produced 1,430 hp at 24k with GM-1 it could also carry up to 4,406 lb of bombs.
However, its good performance sacraficed defensive armament, it only had 1 13mm MG 151 facing rearward with only 250 rounds.
The first S-1 initial production models were delivered in early 1944 albeit in small numbers, I don't have a number on how many were produced.
The S-2 was actually very impressive, it was powered by 2 supercharged BMW 801TG and produced 1,500 hp at 40,000 ft. S-2 also upgraded to a pair of 7.92mm MG 81 instead of the S-1s single MG 151, bomb load was upgraded to 6,614 lb by the addition of a wooden pannier 'tray' which was originally from the JU-88 A-15. A very small number of S-2s were delivered during the spring and summer of 44.
The S-3 was an upgraded version with two Junker Jumo 213A but with the bulky GM-1. Only a few of these aircraft were delivered before the cancellation of the S program in the late summer of 44.
[This message has been edited by Nath-BDP (edited 06-19-2000).]
