The LM-3B launch vehicle is developed by China Academy of Launch Vehicle Technology (CALT), a
subsidiary of China Aerospace Science and Technology Corporation (CASC), upon the extensive heritage
of the mature and flight-proven technology of the Long March family. LM-3B launch vehicle, the most
powerful launch vehicle for GTO mission in Long March fleet at present, takes the LM-3A as the core
stage with four liquid boosters strapped on the first stage. LM-3B enhanced version is capable of
launching a payload up to 5,500 kg into standard GTO.
This mission is the 35th flight of LM-3B, and the 71th flight of LM-3A series launch vehicle.
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LM-3B CONFIGURATION
1.
Fairing
2.
SC
3.
Payload Adapter
4.
Vehicle Equipment Bay
5.
LH2 Tank
6.
LOX Tank
7.
Inter-stage Section
8.
Third Stage Engine
9.
Second Stage Oxidizer Tank
10.
Inter-tank Section
11.
Second Stage Fuel Tank
12.
Second Stage Vernier Engine |
13.
Second Stage Main Engine
14.
Inter-stage Section
15.
First Stage Oxidizer Tank
16.
Inter-tank Section
17.
First Stage Fuel Tank
18.
First Stage Engine
19.
Booster's Nose
20.
Booster's Oxidizer Tank
21.
Booster's Fuel Tank
22.
Stabilizer
23.
Booster's Engine
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LM-3B LAUNCH VEHICLE FLIGHT SEQUENCE
| No. |
Flight Events |
Time(s) |
| 1 |
Lift-off |
0.0000 |
| 2 |
Pitch-over |
11.0000 |
| 3 |
Boosters Separation |
141.0363 |
| 4 |
Stage-1/Stage-2 Separation |
159.3670 |
| 5 |
Fairing Jettison |
234.9670 |
| 6 |
Stage-2/Stage-3 Separation |
344.1670 |
| 7 |
First Shut-off of Stage-3 |
616.5848 |
| 8 |
Restart of Stage-3 |
1,260.0848 |
| 9 |
Second Shut-off of Stage-3 |
1,442.8991 |
| 10 |
Attitude Adjustment |
1,462. 8991 |
| 11 |
SC/LV Separation |
1,542. 8991 |
LAUNCH COUNTDOWN PROCEDURE
| No. |
Time |
Events |
| 1 |
L-7hrs |
LV Stage-3 LOX/ LH2 Fueling |
| 2 |
L-80min |
LV Control System Power on & Functional Checkout;
Gas Pipe Connectors for Stage-1, Stage-2 & Boosters
Drop-off |
| 3 |
L-60min |
LV Telemetry System Power on & Functional Checkout |
| 4 |
L-40min |
Stopping & Disconnecting of Fairing Air-conditioning
Accurate Aiming; Flight Data Presetting & Checking |
| 5 |
L-22min |
Stage-3 Engines Pre-cooling |
| 6 |
L-15min |
LV Third Stage Propellants Topping |
| 7 |
L-15～10min |
SC Umbilical Disconnection |
| 8 |
L-4min |
Telemetry & Tracking Systems Power Switch-over
Fueling Pipes Disconnection of LV Stage-3 |
| 9 |
L-2min |
Gas Pipes Disconnection of LV Stage-3 |
| 10 |
L-100sec |
Control System Power Switch-over |
| 11 |
L-60sec |
Umbilical Disconnections of Control System & TT&C
Swing off of Supporting Arms of Umbilical Tower |
| 12 |
L-30sec |
TT&C Systems Starting |
| 13 |
L-5sec |
Camera on |
| 14 |
0 sec |
Ignition |
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