Types of aircraft | Period | Probability distribution | |||||||
Mean value | Exponential | Lognormal | Beta | Gamma | |||||
(Actual measurement) | Beta (1/λ) | Mu (μ) | Sigma (σ) | p | q | Alpha | Beta | ||
Airplane (large/small) | Entire period | 29.0 | 29.0 | 2.8 | 1.2 | 0.8 | 27.6 | 1.1 | 26.4 |
I | 21.4 | 21.4 | 2.6 | 1.1 | 1.0 | 7.6 | 1.3 | 17.1 | |
II | 30.2 | 30.2 | 2.9 | 1.2 | 0.8 | 3.9 | 1.1 | 27.5 | |
III | 40.6 | 40.6 | 3.2 | 1.2 | 1.0 | 9.3 | 1.1 | 37.2 | |
Small airplane | Entire period | 38.6 | 38.6 | 3.1 | 1.2 | 0.9 | 10.7 | 1.0 | 36.8 |
I | 27.8 | 27.8 | 2.9 | 1.1 | 1.1 | 9.0 | 1.2 | 23.2 | |
II | 40.6 | 40.6 | 3.2 | 1.2 | 0.9 | 10.7 | 1.1 | 37.2 | |
III | 55.9 | 55.9 | 3.5 | 1.2 | 0.8 | 3.6 | 1.0 | 53.8 | |
Large airplane | Entire period | 113.0 | 113.0 | 4.2 | 1.2 | 0.8 | 2.3 | 1.1 | 100.8 |
I | 91.2 | 91.2 | 4.1 | 1.2 | 0.8 | 1.4 | 1.2 | 72.9 | |
II | 118.1 | 117.1 | 4.3 | 1.1 | 0.8 | 1.7 | 1.2 | 98.2 | |
III | 138.6 | 134.6 | 4.5 | 1.2 | 0.8 | 1.3 | 1.3 | 104.1 | |
Helicopter | Entire period | 32.5 | 32.5 | 2.8 | 1.3 | 0.8 | 8.9 | 0.8 | 38.7 |
I | 22.8 | 22.8 | 2.5 | 1.2 | 0.8 | 4.6 | 1.0 | 23.4 | |
II | 32.2 | 32.2 | 2.8 | 1.3 | 0.8 | 17.5 | 0.9 | 37.0 | |
III | 55.4 | 55.4 | 3.3 | 1.3 | 0.8 | 10.2 | 0.8 | 65.8 |