Upgrades

Upgrades are consumable items that each boost a specific stat on your plane. All upgrades applied are unique to that plane, and are reduced by half if that plane crashes. Upgrades are obtained from particular higher-level bosses and enemies.

There is a cap to how many upgrades you can use on a given stat - (see Elements for elemental upgrade caps and the various Classes for non-elemental upgrade caps).

Base Stats

Upgrade	Effect	Description	Possible Sources
Armor Stiffener	+1 Armor	Rare Plane Upgrade. Like a stiff upper lip. But for a plane.	White Spider, Iron Lair, Temple of Bast, Super Secret Base, The Great Leader's Command Center, The Great Leader’s Inner Sanctum, Grand Lion, Retaliator
Barrel Dopant	+1% Damage	Rare Plane Upgrade. Increase exit velocity of charged shells.	Jinn, Rei, Venom Compound, Frozen Owl Monastery, The Elder Arena, The Vaults, The Dig, The Great Leader's Command Center, The Great Leader’s Inner Sanctum, Sentinel
Cowl Lube	+1% Super Speed	Very rare plane upgrade. Reduces drag, increasing terminal velocity.	The Vaults, Home for Special Children, Noble Estates Enemies
Fusion Capacitor	+1 Max Steam	Very rare plane upgrade. Increases total superheated steam capacity.	The Great Leader's Command Center, The Great Leader’s Inner Sanctum, Apex Military Academy
Self-Repair Juice	+2% Armor Self-Repair	Rare plane upgrade. Improves speed of self-repair systems.	Kai, Reeducation Camp, Crypt of Cathulhu, The Great Leader's Command Center, The Great Leader’s Inner Sanctum, Moneyed Duelist, Highborn Marksman
Steam Turbocharger	+1% Steam Recharge	Rare Plane Upgrade. Improves generation of superheated steam by a plane's fusion hotbox.	The Vaults, Imperial City Enemies

Elemental

Upgrade	Effect	Description	Guaranteed Sources	Possible Sources
Antidote Powder	+3% Poison Filter	Packed into small capsules, the powder neutralizes many poisons.	Ra Generator, The Dig	The Vaults, Venom Compound
Diatomaceous Solution	+4% Poison Damage	Tiny sea creatures gave up their lives to gum up the machines of our enemies.	White Spider, Venom Compound	The Vaults
Heat Reflector	+3% Fire Armor	A rare alloy that becomes stronger when hot.	Noble Politician, Crypt of Cathulhu	The Dig, Reeducation Camp
Heavy Caulk	+3% Water Sealant	This caulk is super thick and solid. Does a great job keeping water out.	Lobbyist, Great Trawler	Crypt of Cathulhu, Temple of Bast
Nucleation-Active Protein	+4% Ice Damage	Facilitates the formation of ice crystals.	Iron Lair, Frozen Owl Monastery, Apex Military Academy	Super Secret Base
Research Dept Formula	+4% Fire Damage	Flammable particles that make the flame burn hotter than normal.	Jinn, Reeducation Camp	The Dig
Rubber Sealant	+3% Shockproofing	Prepares for most shocking circumstances.	Ambassador, Super Secret Base	Home for Special Children
Transformer Coil	+4% Shock Damage	Step up the voltage!	Rei, The Elder Arena, Home for Special Children	Chariot Judge
Wetting Agent	+4% Water Damage	Is there anything wetter than water? Our research suggests ... yes.	Kai, Temple of Bast	Crypt of Cathulhu
Whale Oil	+3% Ice Armor	Just as good as regular oil, but works in ultra-cold conditions.	Doctor Notra, The Vaults	Super Secret Base, Frozen Owl Monastery