Timeline for Why do pilots slowly give the plane more thrust during takeoff?
Current License: CC BY-SA 4.0
5 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 14, 2021 at 6:38 | comment | added | reirab | (Also, as a side note, I think you've mixed up your units in the last paragraph. Passenger jets average 450-550 miles per hour ground speed when cruising, not kilometers per hour. Large passenger planes haven't been in the 450-550 km/h range since the before the beginning of the jet age. The Connie was at the upper end of that range, for example.) | |
| Nov 14, 2021 at 6:32 | comment | added | reirab | Even on light aircraft, though, we don't just suddenly jam in full throttle. We can add power much faster than huge jet engines can, but we do smoothly increase the throttle to full, not just suddenly jam it full open from idle. Doing that would decrease the life of the engine and aircraft engines are expensive. Also, it would lead to sudden changes in forces (e.g. p-factor) that the pilot would have to counter with other control inputs. | |
| Nov 14, 2021 at 6:30 | comment | added | reirab | What you feel is indeed a slow increase in thrust, not a slow increase in speed. What you feel is force. You cannot feel speed. It takes a relatively long time (several seconds) for commercial jet engines to spool up, so you do indeed feel the change in force (and, thus, the change in acceleration) as the engine power is increased. You feel it even more in larger aircraft like the 747 you mentioned than in smaller ones, since larger engines tend to take more time to spool up (due to more rotating mass in the engine that has to be accelerated.) | |
| S Nov 14, 2021 at 2:29 | review | First answers | |||
| Nov 14, 2021 at 10:02 | |||||
| S Nov 14, 2021 at 2:29 | history | answered | user61033 | CC BY-SA 4.0 |