Design Guidelines of M-V
The design guidelines for the M-V rocket are listed below:
- To provide launch capability for space science programs in late 1990s and early 21st century,
- To take advantage of simplicity and low cost of solid propellant rockets for medium size payloads,
- To refine and upgrade the technology for solid propellant satellite launcher,
- To use Kagoshima Space Center (KSC) with its range of safety regulations as the launch site,
- To make use of existing ground support facilities at KSC,
- To keep costs at a level which enables annual launches.
The main aims of new technology in the M-V are listed below:
- HT-230M high-strength steel for the first and second stage motor cases,
- Interstage structure between 1st and 2nd stages corresponds to FIH (fire in the hole) separation system,
- CFRP motor cases for the third and kick stages to realize lighter weight,
- extendable nozzles for the third and kick stages,
- nose fairing opening mechanism, and FOG (fiber optical gyro) to sense vehicle attitude.