Just realized that refueling, even in the air, is already in the game. It was added in 3.17, so very recently. All the details about the mechanics are here:
Ship to Ship Refueling
https://robertsspaceindustries.com/comm ... -Refueling
We need either a Starfarer at 6,651,500 aUEC or a Starfarer Gemini at 6,191,500 aUEC. So we won't be getting one of these any time soon. Nice to know the mechanic is in the game though. I imagine if we have a LARGE force of say 5-10 Arrows, we can bring a Starfarer along to keep them flying without having to land for fuel every five minutes. Could probably even leave the ship unattended in space, above a moon say, and keep going back for refills if you're running operations around a given location.