2012-027A
A test version of SpaceX's Dragon cargo delivery vehicle: it consists of a cylindrical service module with two solar arrays, and a conical reentry vehicle. Falcon 9 has 4.0 and 5.2m diameter fairings. SM has 18 Draco MMH/N2O4 thrusters with 400N thrust. The Draco thruster can fire for up to 10 min.
Dragon will carry 7 crew or 2500 kg of cargo. It comprises a Pressure Section, a Service Section and a Trunk Section for unpressurized cargo; a nosecone during ascent. Solar panels are on the trunk.
Carries 18 MMH/NTO thrusters with 1230 kg of prop. Size is 3.7m dia 4.6m high at launch; 3.0m high after nosecone ejected.
Falcon 9 has nine Merlin 1C engines for a total of 3680 kN thust; second stage has Merlin 1C Vac with 427 kN.
The C1 mission will fly 4.5 orbits. C2 will flyby ISS, C3 will berth with ISS. The C2 and C3 flights were combined to "C2+" or "C2/C3".
Dragon is 3.0m tall 3.66m dia, trunk is 2.3m tall 3.66m dia; 16.5m span.
Nominal mass is 6130 wet, 4900 kg dry; up to 6000 kg of cargo. On this flight cargo is 520 kg up, 660 kg down. So launch mass is 6650 kg.
Stage 1 dry is 17726 kg; Stage 2 is 2957 kg. Density of LOX and Kero are 1.41 kg/l and 0.81 kg/l, volume 39k 25k and 7.3k 4.6k 3.7854 liter = 1 gal so 1 gal LOX = 5.34 kg, 1 gal Kero = 3.07 kg so mass is 208t 77t, 39.0t 14.1t
| Dragon COTS 2 | |||
| Date | Time | Event | Orbit |
|---|---|---|---|
| 2012 May 22 | 0744:38 | Launch by Falcon 9 | CC SLC40 |
| T+3:00 MECO | |||
| T+3:05 St 1 sep | |||
| T+3:12 St 2 burn | |||
| T+3:52 Nose cone sep | |||
| 0753:52 | T+9:14 SECO | ||
| 0754:27 | T+9:49 Stage 2 sep | ||
| 297 x 346 x 51.6 (SpX) | |||
| 0755 | T+11:18? Jettison solar array covers | ||
| 0755 | T+11:53 Solar panel deploy | ||
| T+54:49 AGPS demo | |||
| 1030? | T+2:26:48 GNC bay door open | ||
| T+2:40:49 Rel nav checkout | |||
| 0933? | Orbit adjust | ||
| T+4:11:20 Coelliptic | |||
| T+8:46:52 PHA1 Abort backoff demo, single burn | |||
| T+9:31:25 PCE1 burn | |||
| T+9:57:58 Pulsed abort demo | |||
| T+10:37:58 Free drift demo | |||
| 2012 May 23 | 1022:03s | HA1 burn | |
| 1108:06s | CE1 Coelliptic burn | ||
| 2012 May 24 | 0757 | HA2 Height adj burn, flyby | |
| 0843 | CE2 burn coelliptic | ||
| 0930 | RGPS demo | ||
| 2012 May 24 | 0954 | Range 23 km | |
| 0957 | Pettit tallyho Dragon | ||
| 1125 | R-bar nadir crossing at 2.5 km | ||
| UHF comm demo | |||
| Crew command panel (CCP) demo on ISS | |||
| back off to range 7 to 10 km | |||
| 1133 | End pass, strobe off | ||
| 1209 | DHA burn | ||
| 1253:10 | DCE burn | ||
| 2012 May 25 | 0235s | Rear HA | |
| 0321s | Rear CE | ||
| 0454:58 | HA2 Height adjust | ||
| 0532s | CE2 | ||
| 0703:40 | HA3 | ||
| 0717s | HA3-MC1 | ||
| 0737? | HA3-MC2 | ||
| 0748? | CE3 | ||
| 0818:52 | HA4/AI (Approach initiation) burn | ||
| 0828s | HA4-MC1 | ||
| 0852 | HA4-MC2 | ||
| ISS approach to 2.5 km | |||
| 0844 | ISS app to 1.4 km, approach ellipsoid | ||
| 0912? | Hold at 350m nadir | ||
| Yaw mvr | |||
| 0920 | Approach to 250 m | ||
| 0929 | Hold at 250m | ||
| LIDAR test | |||
| 0956 | Resume approach | ||
| 1000 | Approach at 235m nadir | ||
| 1000 | Retreat to 250m hold point | ||
| 1006 | Hold at 250m | ||
| 1019 | Approach | ||
| 1022 | Hold at 240m? | ||
| 1103 | Approach to 200 m | ||
| 1114 | Hold at 200m | ||
| 1121 | Enter Keep Out Sphere (KOS) at 200m | ||
| 1133 | Hold at 150m | ||
| 1144? | Resume approach towards 30m | ||
| 1201 | Hold at 78m for LIDAR reconfig | ||
| 1221 | resume approach | ||
| 1225 | At 59m, command retreat | ||
| 1228 | Hold at 78m | ||
| Reflections off JEM EF require LIDAR reconfig | |||
| 1303 | resume approach | ||
| 1313 | hold at 30m | ||
| 1329 | resume | ||
| 1347 | hold at 10m | ||
| 1350 | Go for capture | ||
| 1356:01 | SSRMS capture Dragon (Pettit) | ||
| 1552 | SSRMS berth Dragon, stage 1 | ||
| 1602 | Berth complete on Harmony nadir CBM | ||
| 2012 May 26 | |||
| 0953 | Dragon hatch open | ||
| 2012 May 27 | |||
| SSRMS ungrapple Dragon | |||
| SSRMS grapple Dextre | |||
| 2012 May 29? | |||
| 1930? | SSRMS/SPDM inspect Dragon trunk | ||
| SSRMS berth SPDM on MBS PDGF-2 | |||
| SSRMS ungrapple SPDM | |||
| SSRMS grapple Dragon | |||
| 2012 May 30 | Dragon hatch close | ||
| 2012 May 31 | |||
| 0807 | Unberth | ||
| 0949 | SSRMS deploy at 10m point, ungrapple | ||
| 0950 | Sep burn 1, retreat on R-bar | ||
| 0951 | Sep burn 2 | ||
| 1001 | sep-3, leave approach ellipsoid | ||
| GNC bay door close | |||
| 1451 | Deorbit burn (ungrap+4h) 9:50 100m/s | ||
| 1509 | Jettison trunk | ||
| 1525 | Entry | ||
| 1536s | Parachute deploy | ||
| 1542 | Land in Pacific, 450 km off California | ||
| 120N 27W | |||
Payload:
- ISS cargo, 520 kg (660 kg return): food, water, clothing
- 306 kg food and provisions
- 21 kg NanoRack Module 9, ice bricks
- 123 kg cargo bags
- 10 kg computers
- 60 kg packaging
- Return cargo, 660 kg
- 143 kg crew pref items
- 93 kg payloads: Plant Signalling hardware, SHERE polymer experiment, MSRR cartridges, other experiment components and tapes
- 345 kg: Multifiltration bed, FPCA (fluids control and pump assy) Iodine water containers, JAXA Multiplexer
- 39 kg, EMU hardware and gloves
No comments:
Post a Comment