Table 2 Ambient conditions and engine settings during contrail measurement sequences.
From: Cleaner burning aviation fuels can reduce contrail cloudiness
Contrail measurement conditions | Ref 2 | SSF1 | SAF1 | SAF2 |
|---|---|---|---|---|
Contrail age (s) | 39–132 | 48–134 | 53–140 | 41–116 |
Sampling time (s) | 482 | 280 | 284 | 119 |
Ambient RHI (%) | 115-25 (±7) | 108–15 (±10) | 120 (±4) | 110 (±5) |
Ambient T (K) | 215 (±0.5) | 220 (±0.5) | 218 (±0.5) | 216 (±0.5) |
T difference to SAC (K) | −9.0 (±0.5) | −4.9 (±0.5) | −5.9 (±0.5) | −8.0 (±0.5) |
Altitude of source aircraft (m) | 10670 (±5) | 10364 (±3) | 9726 (±3) | 9656 (±2) |
Fuel flow (kg/h) per engine | 1180 (±30) | 820 (±44) | 1132 (±25) | 1091 (±20) |
N1 (%) thrust setting | 81 (±1) | 71 (±1) | 77 (±0.6) | 77 (±0.6) |
Speed of source aircraft (Mach) | 0.65 (±0.02) | 0.58 (±0.01) | 0.76 (±0.01) | 0.76 (±0.01) |
