H-IIB Launch Vehicle
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| H-IIB Launch Vehicle Liftoff Image CG (Courtesy of JAXA) |
H-IIB launch vehicle is upgraded version of the current H-IIA launch vehicle. H-IIB launch vehicle has two major purposes, one is to launch the H-II transfer Vehicle(HTV) to the International Space Station(ISS), and the other is to respond to broader launch needs by making combined use of both H-IIA and H-IIB launch vehicles. MHI and JAXA is co-operationg in developing H-IIB launch vehicle.
| Item | H-IIB Launch Vehicle | H-IIA Launch Vehicle 204(Reference) |
|---|---|---|
| Length | 56m | 53m |
| Mass | 531metric tons | 445metric tons |
| First Stage Outside Diameter | 5.2m | 4m |
| First Stage Engine | LE-7A × 2units | LE-7A × 1unit |
| Second Stage Outside Diameter | 4m | 4m |
| Second Stage Engine | LE-5B | LE-5B |
| Rocket Booster | SRB-A | SRB-A |
| Launch Capability (GTO) | 8metric tons | 6metric tons |
| Launch Capability (Orbit for HTV) | 16.5metric tons |
Business contact: Aerospace Systems -
