…..
I think the problem with the blade synchronisation still exists, today, with the RAF Chinooks.

Nope.

UUoret love the photos….this aircraft floated for a good time and IIRC only sunk after it was towed back towards Aberdeen….

The Chinook can be used to land on water etc. I found it amusing that our trials film was given out free with a Magazine as part of a Boeing disk! It is wrongly attributed to US forces on Youtube when I looked some time ago!