Go Taikonauts! - Engine (original) (raw)
| Designation | Application | Propellants | Thrust (KN) | Mass (kg) | Length (m) | Diameter (m) | Isp (sec) | Comments |
|---|---|---|---|---|---|---|---|---|
| YF-1 | CZ-1 stage 1 | NA27S/UDMH | 255 | 2.0 | 240 | |||
| YF-1A | CZ-1D stage 1 | NA27S/UDMH | 275 | 2.0 | 243 | |||
| YF-2 | CZ-1 stage 1 | NA27S/UDMH | 1020 | 1180 | 2.65 | 2.25 | 240 | 4xYF-1 |
| YF-2A | CZ-1D stage 1 | NA27S/UDMH | 1101 | 2.0 | 243 | 4xYF-1A | ||
| YF-3 | CZ-1 stage 2 | NA27S/UDMH | 320 | 350 | 2.45 | 1.55 | 287 | |
| YF-20 | FB-1,CZ-2C,3 stage 1 | N2O4/UDMH | 696 | 712.5 | 259 | |||
| YF-20B | CZ-2C/SD,2D,2E,3,3A,3B,3C,4A,4B stage1; CZ-2E,3B,3C strap-ons | N2O4/UDMH | 740 | 712.5 | 260 | |||
| YF-21 | FB-1,CZ-2C, 3 stage 1 | N2O4/UDMH | 2785 | 2850 | 3.3 | 3.5 | 259 | 4xYF-20 |
| YF-21B | CZ-2C/SD,2D,2E,3,3A,3B,3C,4A,4B stage1 | N2O4/UDMH | 2962 | 2850 | 3.3 | 3.5 | 260 | 4xYF-20B |
| YF-22 | FB-1,CZ-2C,2D,3,4A stage 2 | N2O4/UDMH | 720 | 289 | ||||
| YF-22B | CZ-2C/SD,2E,3,3A,3B,3C,4B stage 2 | N2O4/UDMH | 738 | 298 | ||||
| YF-23/23F | FB-1,CZ-2C,2D,3,4A stage 2 | N2O4/UDMH | 46 | 282 | Vernier engine (4 chambers) | |||
| YF-23B | CZ-2C/SD,2E,3A,3B,3C,4B stage 2 | N2O4/UDMH | 47 | 289 | Vernier engine (4 chambers) | |||
| YF-24/24F | FB-1,CZ-2C,3 stage 2; CZ-2D,4A stage 2 (YF-24F) | N2O4/UDMH | 766 | 875 | 3.46 | 3.3 | YF-22 + YF-23/23F | |
| YF-24B/24D | CZ-2C/SD,2E,3A,3B,4B stage 2; CZ-3 stage 2 later version (YF-24D) | N2O4/UDMH | 789 | 957 | 3.48 | 3.3 | YF-22B + YF-23B/23F | |
| YF-40 | CZ-1D stage 2; CZ-4A,4B stage 3 | N2O4/UDMH | 100 | 166 | 1.2 | 0.65 | 306 | |
| YF-73 | CZ-3 stage 3 | LOX/LH2 | 44.15 | 236 | 1.4 | 2.2 | 420 | |
| YF-75 | CZ-3A,3B,3C stage 3 | LOX/LH2 | 78.45 | 550 | 2.8 | 3.0 | 437 | |
| Note: 1. There were FY designations used for early launchers (FB-1) which are similar to YF series but porduced by different factories, with slightly lower performance than YF. 2. Some report mentioned DaFY5, DaFY6, DaFY20 and DaFY21 engines. In fact, they are similar to YF-20B, YF-21B, YF-24B and YF-22B (maybe with slightly higher performance). DaFYs are used on CZ-3 serious, CZ-2D and 4A. 3. Thrust and Isp for first stage engines are sea-level, while all others are vacuum. 4. Data sources: China Aerospace magazine; Dietrich Haeseler |
(Left to right: EPKM, PKM, FG-02, PKM-77, FG-23, FG-47. Photo credit: China Aerospace)