Kalran: Tales of the four nations/Pelican Mk1

"Lets get to those supplies!"

-A Tangris leaving the Refinery

Tactical analysis

 * Supplies delivered guaranteed: A single Tangris is always included with the construction of a Refinery, and can be built from said Refinery of the Airfield, and will immediately fly to the nearest supply pad to gather, and is invisible on radar, until it gathers supplies, and doubles as a transport capable of carrying two squads. And in the event they are attacked they have a all purpose grenade launcher to ward off attackers
 * Outpost on demand: Each Tangris is also outfitted to convert into a UCA outpost on command (but its irrevocably complex to reverse). These outpost allows the commander to built new bases without the need of building an expensive MCV, but the commander has to, depending of the Tangris veterancy, reactivate the combat level for each outpost so building a forward base for Barracks and such will take time
 * Convoys attacked: But the Tangris is a harvester first and foremost. While being immune to ground assaults have particularly thin armor, so they must avoid anti-air at all cost, and while its grenades can ward of small attacks it can't target aircrafts and it's weak caliber means a mass of anti-air infantry or vehicles pose a huge threat
 * Tis but a scratch: Veteran pilots tend to know the inside and out of their helicopter, allowing them to patch a hole the moment its made, weld on improvised armor without losing speed, and using a special fuel mix for their engine

Ace upgrade
Tangris gains increased speed, armor, and regeneration