Topic summary
Antares 100
Extracted from the Wikipedia article Antares (rocket).
Antares 100 series
The Antares 100-series first stage was powered by two AerojetAJ26 engines. These began as KuznetsovNK-33 engines built in the Soviet Union in the late 1960s and early 1970s, 43 of which were purchased by Aerojet in the 1990s. Twenty of these were refurbished into AJ26 engines for Antares. Modifications included equipping the engines for gimballing, adding US electronics, and qualifying the engines to fire for twice as long as designed and to operate at 108% of their original thrust. Together they produced 3,265 kilonewtons (734,000 lbf) of thrust at sea level and 3,630 kN (816,100 lbf) in vacuum.