5 ms·

The difference between heavy and super heavy spacing is only 30-60 seconds (depending on airport), which is a lot less than an additional arrival/departure slot

The difference between heavy and super heavy spacing is only 30-60 seconds (depending on airport), which is a lot less than an additional arrival/departure slot (which come in pairs for obvious reasons).

martinald 9y ago
But LHR does 30-50 flights per hour. 60 seconds is a lot of time...
- SeoxyS 9y ago
  LHR has more than one runway.
  - bb101 9y ago
    At any time, one runway is used for take offs and the other for landings. It is a really busy airport operating at near capacity.