Diameter mm | Mass g | Test velocity m.s-1 | Diameter mm | Mass g | Test velocity m.s-1 |
12.5 15.0 25.0 35.0 | 0.94 1.63 7.53 20.7 | 16.0 17.8 23.0 27.2 | 45.0 55.0 65.0 75.0 | 43.9 80.2 132.0 203.0 | 30.7 33.9 36.7 39.5 |
From the table, we calculated the square of hail speed by 0.047~0.049 equals hail diameter. Thus we calculate the hail air resistance coefficient. When the hail free fallers accelerated to a certain stag, hail gravity and hail resistance balance final constant speed landing. Based on the above principles, our hail tester is for hail and shells by the pneumatic acceleration. When cartridge from gun, hail with constant speed bumps after components. |
Standard hail diameter: 25mm±2% Standard hail mass: 7.53g±2% Send speed setting: 23.0m/s (Continuously adjustable) Speed measure accurately: ±2% Speed windage range: ±5% NOTE: Hail manufacturing temperature -10°C, storage temperature -4°C, This to for hail more easily out from mould. |