HELOFAN, check these documentaries, I have them all and they're fascinating.
Helicopters: The Ultimate Profile. It is 238 minutes long and I got it years ago from a specialist shop on VHS. It discusses so many models and has a lot of original and archive footage. It also has a very memorable long sequence of Hinds operating with some odd electronic orchestrial music as well as some long sequences of BO-105 low-level training flights in and around dense woods at high speed.
Helicopters: The Ultimate Profile
DD Video
5 Churchill Court
58 Station Road
North Harrow
Middx HA2 7SA
www.ddvideo.co.uk
Another great documentary is
Chopper: What Goes Up. I was only able to ever find volume 3 that consisted of these episodes: The Turbulent Fifties, Full Metal Gunship and Riders in the Sky. The Turbulent Fifties episode is really interesting, full of old archive footage of the first turbine choppers and those big MD, compound and Hughes experimental machines.
Chopper (What Goes Up)
60 minutes
Silver Trak Audio & Video
The Extreme Machines / Discovery docu called
Choppers is also a good one to have.
There's also another good docu called
The West's Combat Helicopters: Bell UH-1 Huey, Agusta A109, MD Defender, Gazelle, BO-105P, Lynx and Lynx 3, Dauphin / Panther, A129 Mangusta, Blackhawk, H-76 Eagle, HueyCobra, Apacha and the LHX. This features a lot of original, demo and test footage of these choppers.
The West's Combat Helocopters
60 minutes
Command Vision
28 LancasterMews
London, W2 3QE
Part of the Modern Combat Aircraft 2 series
Don't bother with the Straight Up! Helicopters in Action documentary made for IMAX. I found it quite disappointing, more for general audiences.