Allied Air Vehicles

Rotary Wing

UH-1D Huey Slick - Utility Helicopter. Carries 8-10 troops and 2 door gunners, as well as 2 pilots (for when the first one gets shot)

OH-6 Cayuse, aka LOACH for Light Observation Helicopter - delightful. Fast, agile, loyal door gunner, maybe a minigun. Honestly, pilot's choice.
OH-13 Sioux, aka The Spunk Bubble - a travesty of an aircraft, arguably just a means to transport a rotor torque alarm through the sky. There's a CASEVAC version which I'm pretty sure is a warcrime.

UH-34 Seahorse / Choctaw - Medium Lift helicopter. Carries 12 troops and 1 door gunner, plus 2 pilots.
H-21 Workhorse/Shawnee/Flying Banana - the world's worst medium lift helicopter. Carries 22 troops who are all wishing it wasn't.

UH-1C Huey Gunship, aka Hog - Huey with a variety of guns or rockets strapped to the side, and chonically underpowered engines (because they used the uprated Delta airframes as slicks and left the crappy Charlies for gunships)
AH-1 Cobra - the murder hornet of Army Aviation. Always a delight to see them appear over the LZ.

OV-10 Bronco - the beloved Mighty Steed of the AFAC. Slow, with excellent vision and a rocket-heavy armament. If the Bronco can see it, it's going to have a bad day.
O-1 Bird Dog - a Cessna that got lost and sprayed grey. Powered by a lawnmower engine and unarmed bar a radio. Scatter is weirdly fond of it despite everything.
O-2 Skymaster - a travesty of an aircraft; two Cessnas got cut-and-shut. Powered by two lawnmower engines and spite. Best employed by cutting up and turning into a desk.

A-1 Skyraider, aka Spad. Massive and overpowered pistol engine aircraft with a million pylons and a vast lift capacity Can stay on station all day, come in at treetop height and walking pace to spaff napalm over the broad area.
A-4 Skyhawk, aka Scooter - baby strike jets catapulted off Navy carriers.
A-6 Intruder - medium bombers catapulted off Navy carriers. Bombs for days, and tiny engines that give a weird whisting noise as they overfly you.
A-7 Corsair-II - Air Force medium bomber. Fast and angry, bombs for days.
A-37 Dragonfly, aka Super Tweet - the tiniest little fighter bomber that could. Adorable. No notes. Will not hear a bad word spoken against.

F-4 Phantom - Air Force heavy fighter. Missile armed, your best defence against MiGs.
F-8 Crusader - Air Force fighter. Gun armed, sometimes beats up ground targets for us.
F-100 Super Saber, aka Hun (for Hundred) - light fighter/bomber.
F-105 Thunderchief, aka Thud - verrrrry fast fighter bomber with tiny windows and crap visibility. Cross your fingers.

B-52 Stratofortress. Any air callsign with the prefix Heavy is probably one of these. Bombs for weeks; they're flying so high they can't see anything. Read your map grids verrrry carefully.