What a beautiful marriage of the two most dangerous aircraft ever conceived. They just needed the blades to rotate like an osprey and it would've been perfect.
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dudes just wanted to be a quadcopter together
This is the aeronautical equivalent of the floating house that capsized. And this thing was so poorly engineered, it failed before it even had a chance to tip over.

Piasecki Aircraft has built a total of 5 aircraft between 1959 and 2024. This was one of them. The company was founded after Frank Piasecki was ousted from Piasecki Helicopter. Piasecki Helicopter focused on multi rotor lift helicopters (frank wanted to pursue compound helicopters) and was acquired by Boeing in 1987, they went on to produce the famous "Chinook" helicopter.
How did anyone think this was a good idea?
Engineer A: What if... Hits bong wh-what if we like... Takes shot ww-we li-like make a DRONE out of HELICOPTERS?
Engineer B: It'd be way to heavy and wouldn't fly?
Engineer A: Finishes bag of edibles We'll attach it to a... snorts line BL-BLIMP!!!
Engineer B: Acid kicks in ...DuUUuuUuuUdeee!
I found a YouTube link in your post. Here are links to the same video on alternative frontends that protect your privacy:

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