londonblue
Topgun Pilot
- Joined
- Feb 18, 2004
- Messages
- 19,196
I think I'm going to have to get off my lazy arse and actually ask the Airport. Certainly we are noticing flights coming in quite late now (after 11pm) and there is a regular flight out at 5 am. I posted earlier on another thread that EasyJet are far quieter than Ryan Air and Mad Cyril tells me that's down to the aircraft they use. Either way, since the arrival at the Irish the noise levels have risen considerably.
It could be a number of things. You'll never find out the answer to this, but it also depends on whether they take off VX or VY. VX is the greatest angle of climb, VY is the greatest rate of climb.
VX will get you up slower in terms of time, but will get you out of earshot of the ground quicker.
VY will get you up quicker in terms of time, but is a shallower climb rate, meaning you create noise that can be heard on the ground for longer, and over a greater distance. Since VY is a shallower climb, the nose is lower and the plane is faster, but importantly, less fuel is used. From an airline perspective fuel cost is everything, but VY is also more comfortable for passengers...
It could be that different airlines are using different techniques, although all with have to abide by the airport's noise abatement rules.
Last edited: