The technology of ship launching with air bags developed from small flat bottom ship of several ten tons to good-sized,complicated,high value added ships. The successful cases proved that ship DWT exceed 50,000 tons launched by air bags is feasible as the advancing of manufacture technology of intensive air bags and the design of slipways.
To launch ships DWT more than 5000 tons you must consider the following factors: Take more care of the design of air bag ship launching slipway which has the higher demand of the degree and degree variety. Basing on the ship's self-weight,center of gravity,the form of ship bottom,degree of slipways,water level,people should calculate every motion of the ship during the launch process to testify the rationality of air bags positions. People should pay more attention to calculate the ship stress and inner pressure when the stern drops and cock-up.
| D(m) | (4-5) | (6-8) | ||
| TP(Mpa) | WP(Mpa) | TP(Mpa) | WP(Mpa) | |
| 1 | 0.14-0.16 | 0.12-0.14 | 0.22-0.26 | 0.20-0.24 |
| 1.2 | 0.12-0.14 | 0.10-0.12 | 0.20-0.24 | 0.17-0.22 |
| 1.5 | 0.10-0.12 | 0.08-0.10 | 0.15-0.20 | 0.13-0.18 |
| 1.8 | 0.08-0.10 | 0.07-0.09 | 0.13-0.16 | 0.11-0.14 |
| 2 | 0.07-0.09 | 0.06-0.08 | 0.12-0.15 | 0.10-0.13 |
