History of the tandem rotor helicopter:
The image that begins that paper (another version attached below) was taken at San Carlos, at the Vertical Challenge Airshow sponsored by the Hiller Museum, in 2002. I rode in the H-21, the second one from the bottom in the photo (lucky me!), as a thank-you for giving one of the Classic Rotors guys a quick hop in my Sikorsky S-52 at the prior year's show (Classic Rotors owned/operated that Shawnee).I saw a version of the Chinook at the annual helicopter flight show in San Carlos CA do something that totally stunned me. They did a maximum vertical lift to an altitude of 800 feet. The craft literally lept off the ground and rocketed upward as if it was riding on an explosion. It was a most indescribable feat - you had to be there to truly believe it!
I thought that strange ilk had become extinct by the end of the last millennium...;-) Do the C-130s perhaps still have one?
The D model could basically lift its own weight with a tandem sling... Is that still true with the newer models? Is everything glass and computers now?Canada just got some brand new Chinooks here in the last couple of years. I am also a -47 FE. Still fly them as a civilian instructor.