Are you talking about the ACH-47A Chinook? Because I also made that, in fact it's going to be apart of my Vietnam Pack. I;m also still working on the AH-54 Cheyenne still, you may like that helicopter too.
Yes I was in fact and the Chinook is called the mighty wokka because the noise it makes in flight is so loud that it actually makes it an easy target for enemys to find. Not to mention that the wind from the main rotor can blow a Cessna 172 right onto it's back.