Nice suggestions. Most of the eventual aircraft will be military based but I do like Sorontair. The mounted cavalry  are going to be the Valkyrie Force or something, with all the horses named after animals/characters from Norse mythology. For that reason, I am looking after a place name other than Valhalla for the Pilots' Lounge. Something associated with the Valkyrie or whichever Norse god was regarded as their "boss" in preference.
 Perhaps I should find a tropical island and put flight 815 crashed on there. Ideally there would be a snowy biome there as well so polar bears could occasionally appear.
 Not in existence yet, even though there are plenty of horses in the area to tame and breed from.
 Yes, we have (I think) had a week or weekend where we ran a Lost remake world instead of one of our worlds.