First designed by Chase Aircraft, and built by Fairchild, the C-123K was a Prop. military transport airplane boosted by J85 engines.
Extensive use in SEA in many differents missions.
The great FS9 C-123 airplane from Vladimir Zhyhulskiy FS9, FSX compatible
Freeware, available at Flightsim.com
SEA textures (USAF, Laos, Cambodia...) by SteeveB available here
Grumman HU-16 Albatross
Designed and built by Grumman as an amphibious airplane. Used in Vietnam to rescue pilots along the coast.
In many rescue missions, crew use M-16 rifle (their only weapons) to protect the downed pilots at sea.
Two Albatross for FSX are available.
The HU-16 Albatross from Greg Pepper (RIP) and Michael Verlin, updated by David Poulin
Freeware, available at Flightsim.com Original textures (US Navy, USAF... can be found here
Designed and produced, during 45 years, by Antonov as a light utility transport airplane. It is a very strong airplane, used by many civil and military companies and air forces in dozen of versions.
During Vietnam war, 4 North-Vietnamese Antonov AN-2 have tried to bomb the Lima Site 85, a USAF radar station. 2 of them were attacked by a Air America Huey, and were downed by the Huey crew using sub-machine guns.
Two AN-2 for FSX are available.
Antonov AN-2 from Vladimir Zhyhulskiy FS9, FSX compatible
Freeware, available at Flightsim.com
A North-vietnamese repaint by Xavier Carré is avalable here