Disclaimer: (This is purely feedback and I have nothing negative towards the mod and dev team. Love you guys.)
So far, I'm really enjoying the Vietnam DLC, the assets, sounds, and effects are really high quality!
One thing I'm really surprised in is the quality of the UH-1D Iroquois 3D model, especially with the forward tilt of the main rotor mast being modeled correctly.
However, while the flight model in regards to how the aircraft performs is just fine, it's the angle of the flight model in relation to the main rotor mast that I noticed was a little odd.
Images and details on flight model issue:
First image shows how the helicopter hovers in-game: (The nose of the aircraft is level, but the main rotor mast is tilted forward, which realistically should be accelerating the aircraft forward)
https://imgur.com/a/ENLAXVg
Second image shows how the helicopter should hover: (Nose is angled up, aircraft is in a tail-low position, but the rotor mast is parallel with the downward force of gravity with the blades spinning level)
https://imgur.com/a/yeeisK3
Possible fix?:
I'm not a game and/or mod developer myself, especially in ArmA; however, could it be possible to take the existing helicopter model and tilt forward the flight model center-point (located at the top of the rotor mast) till the upward/vertical point of the flight model is parallel with the rotor mast?