Stalker
SR Space
Two-stage, small-lift launch vehicle burning liquid oxygen and methane, designed for commercial small-satellite launches.
Technical specifications
- Launch mass
- 60.5 t
- Length
- 32.8 m
- Diameter
- 2.2 m
- Propellants
- Liquid oxygen and methane
- Payload capacity
- 1,700 kg to 200 km LEO; 1,300 kg to 400 km SSO; 700 kg to 700 km SSO
- First stage length
- 18.5 m
- First stage engines
- 9x RD-1 (open cycle)
- First stage thrust (sea level)
- 76.5 tf
- First stage thrust (vacuum)
- 86.4 tf
- First stage specific impulse (sea level)
- 300.0 s
- First stage specific impulse (vacuum)
- 339.2 s
- Second stage length
- 6.25 m
- Second stage engine
- 1x RD-3.5
- Second stage thrust (sea level)
- 11.0 tf
- Second stage specific impulse (vacuum)
- 360.0 s
- Payload fairing (standard)
- 2.2 m diameter x 5.2 m length
- Payload fairing (extended)
- 3.2 m diameter x 8 m length
About
Stalker is a two-stage, small-lift orbital launch vehicle developed by SR Space (SR Rockets) for commercial launches, designed according to market demand for dedicated small-satellite launch capacity. The vehicle uses liquid oxygen and methane propellants across both stages and is designed with reusability in mind for its RD-1 first-stage engines.
The first stage is propelled by 9 RD-1 engines built in an open-cycle layout, while the second stage uses a single RD-3.5 engine. Stalker can be equipped with either a standard or an extended payload fairing, both manufactured from composite materials developed in-house by SR Space. Depending on the target orbit, Stalker can deliver between 700 kg (700 km SSO) and 1,700 kg (200 km LEO) of payload.
Documentation
No public datasheet yet — request the datasheet / ICD from the supplier.
