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11D428 
Summary
The 11D428A-16 (manufacturer's name RDMT-135M) is a liquid pressure-fed rocket engine burning N2O4/UDMH with an O/F of 1.85. It is used for crew-rated spacecraft propulsion applications. It is currently used in the KTDU-80 spacecraft propulsion module. The previous version, the 11D428A (manufacturer's name RDMT-135) is still used as the reaction control system thrusters of the Zvezda ISS module. The 11D428A-16 generates 129.16 N (29.04 lbf) of thrust with a chamber pressure of 0.88 MPa (128 psi) and achieves a specific impulse of 291 s (2.85 km/s). It is rated for 500,000 starts with a certified ignition time of 0.03 seconds to 2000 seconds. Each unit weights 1.5 kg (3.3 lb).
| Country of origin | Russia |
|---|---|
| Date | 1993–1997 |
| First flight | 1997-10-05 (Progress M-36) |
| Designer | NIIMash |
| Application | RCS thruster |
| Predecessor | 11D428A |
| Successor | 11D428AF-16 |
| Status | In Production |
| Liquid-fuel engine | |
| Propellant | N2O4 / UDMH |
| Mixture ratio | 1.85±0.15 |
| Cycle | pressure fed |
| Configuration | |
| Chamber | 1 |
| Performance | |
| Thrust, vacuum | 129.16 N (29.04 lbf) |
| Chamber pressure | 0.88 MPa (128 psi) |
| Specific impulse, vacuum | 291 s (2.85 km/s) |
| Restarts | 500,000 |
| Dimensions | |
| Dry weight | 1.5 kg (3.3 lb) |
| Used in | |
| Soyuz since Soyuz TM-28 and Progress since Progress M-36 | |
| References | |
| References | [1][2][3] |
Versions edit
This engine has been used with certain variations in the crewed Russian space program since the Salyut 6 in Soviet times. The three main versions are:[4]
- 11D428: Delivered in 1970 for use in Salyut 1.
- 11D428M: Version developed for the Yantar-2K platform. It reached space on the first launch, Kosmos 697 on August 6, 1974.
- 11D428A (AKA RDMT-135): Version developed for the Soyuz 7K-S, it flew on Kosmos 670, Kosmos 772 and Kosmos 869. Later used on the KTDU-426.[5]
- 11D428A-10: Thruster used on the Zvezda ISS Module. Originally developed for the Mir Core Module.
- 11D428A-14: Thruster used on the Zvezda ISS module.
- 11D428A-16 (AKA RDMT-135M): Improved specific impulse version. Used on the KTDU-80 since Soyuz TM-28.[6]
- 11D428AF-16:Thruster version developed for the Fobos-Grunt planetary sample mission.
| Engine | 11D428A | 11D428A-16 | 11D428AF-16 |
|---|---|---|---|
| Development | 1968–1974 | 1968–1977 | 1993–1997 |
| Engine Type | Liquid pressure-fed rocket engine | ||
| Propellant | N2O4/UDMH with 1.85 O/F ratio | ||
| Thrust | 130.5 N (29.3 lbf) | 129.16 N (29.04 lbf) | 123.5 N (27.8 lbf) |
| isp | 1:56 Exp. Nozzle:290 s (2.8 km/s) 1:150 Exp. Nozzle:302 s (2.96 km/s) |
291 s (2.85 km/s) | 306.2 s (3.003 km/s) |
| Nominal Inlet Pressure | 1.77 MPa (257 psi) | 1.76 MPa (255 psi) | 1.47 MPa (213 psi) |
| Nozzle | 1 | 1 | 1 |
| Burn time | 570s | 2700s | 50,000s |
| Ignitions | 500,000 | ||
| Ignition time | 0.03 to 2000s | ||
| Mass | 1.2 kg (2.6 lb) | 1.5 kg (3.3 lb) | 1.9 kg (4.2 lb) |
| Length | 274 mm (10.8 in) | 289.5 mm (11.40 in) | 372 mm (14.6 in) |
| Diameter | 98 mm (3.9 in) | 157.4 mm (6.20 in) | |
| Uses | Soyuz 7K-S, Soyuz-T and Soyuz-TM | Soyuz-TMA, Salyut-6, Salyut-7, Mir Core Module, Zvezda | Fobos-Grunt |
| References | [1][3][7][8][9] | ||
See also edit
References edit
- ^ a b "Двигатели 1944-2000: Аавиационные, Ракетные, Морские, Промышленные" [Aviadvigatel 19442-2000: Aviation, rocketry, naval and industry] (PDF) (in Russian). pp. 75–81. Retrieved 2015-07-25.
- ^ Pillet, Nicolas. "Le système de propulsion du vaisseau Soyouz" [The propulsion system of the Soyuz spacecraft] (in French). Kosmonavtika.com. Retrieved 2015-07-14.
- ^ a b "Двухкомпонентный ракетный двигатель малой тяги 11Д428А-16" [Bipropellant thruster 11D428A-16] (in Russian). NIIMash. Archived from the original on 2015-11-26. Retrieved 2015-07-30.
- ^ "История" [History] (in Russian). NIIMash. Retrieved 2015-07-30.
- ^ "RDMT-135". Encyclopedia Astronautica. Archived from the original on 2015-08-24. Retrieved 2015-07-30.
- ^ Malikov, A.; Zhuk, E. (June 1999). "3.17. Комбинированная Двигательная Установка (КДУ) (Combined Propulsion System)". Soyuz Crew Operations Manual (SoyCOM) (ROP-19) (Final) (PDF). Yu.A. Gagarin Cosmonautís Training Center. pp. 122–129. Archived (PDF) from the original on 16 August 2023.
- ^ "Двухкомпонентный ракетный двигатель малой тяги 11Д428АФ-16" [Bipropellant thruster 11D428AF-16] (in Russian). NIIMash. Archived from the original on 2015-11-26. Retrieved 2015-07-30.
- ^ "Серийный двухкомпонентный ракетный двигатель малой тяги 11Д428А" [Bipropellant thruster 11D428A] (PDF) (in Russian). NIIMash. Retrieved 2015-07-25.
- ^ "RDMT-100". Encyclopedia Astronautica. Archived from the original on 2015-08-24. Retrieved 2015-07-30.
External links edit
- KB KhIMMASH Official Page (in Russian) Archived 2016-03-20 at the Wayback Machine