Kalran: Tales of the four nations/Helipad

Due to all of the Dwarves steel planes being too maintenance intensive that it requires a specialized airfield, either from their mountains or a large airfield built nearby, far from the front lines. Limiting the Dwarves main on field airforce to helicopters and airships, and in the case Anwen VTOL aircraft. And unlike other factions helicopters they need to return to the helipad to reload