Astronatix's SPT-100 lists the following:
Stechkin electric rocket engine. Used on Meteor and Gals satellites.
- In Production. 1.35 kW Hall thruster.
- Thrust variable 2 to 20 kgf.
- Marketed in USA by Space Systems/Loral and Fakel.
- Status: In Production. Date: -1984.
- Thrust: 196 N (44 lbf).
- Specific impulse: 2,500 s. Specific impulse sea level: 800 s.
- Electrical Input Power: 1.35 kW.
Question: How does a conventional (looking) Hall effect ion thruster have a sea-level Isp of 800? Can it really operate at atmospheric pressure?
Also: Isn't 196 Newtons about 1000x larger than what you might expect?