Air routes around a "hurricane eye" on a tidally locked planet

On a tidally locked Earth-like planet a big part of long distance air routes would have to approach the hurricane eye and some may even benefit from it.

On Earth aircraft are able to save time and fuel by going along a jetstream. Realistically that mechanism should also work there. The question is what would be the limiting factor in using such routes? (Or maybe it's not worthy and going directly would be the best idea?)

How much speed should I realistically add to an aircraft because of flying along such jetstreams around "eye" on tidally locked planet and what would be the main limiting factor?

• speed of the wind?
• endurance of aircraft?
• endurance of passengers? (sickness bags)
• very hard to use reserve airports? (after all they are all built in area with permanently bad weather...)
• other?

EDIT: The planet circulates a dim red dwarf, one year is 9 days long.

posted over 7 years ago

Shadow1024‭

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