Comment by cjrp
3 hours ago
Virgin Atlantic trialled this at Heathrow in 2006[0]. It looks like it didn't gain traction because the airport would need to be resigned to support it, and the landing gear might have been damaged by so much towing.
[0] https://simpleflying.com/throwback-virgin-atlantics-fuel-sav...
At least in Europe, except for the largest airports, the start slots are well organized enough that the taxi+wait time is just enough to warm up the engines, eliminating the saving.