Originally Posted by
Mr Mac
I occasionally test building facades with the help of a Rolls Royce Griffon at Vinci testing facility in Leighton Buzzard. Great sound, it used to be at Taywood Engineering. Another test facility in Telford called UL Solutions formally Wintech has a DC6 Double Wasp for same purpose a different sound but equally pleasant. Both are very smoky when starting and shed quite a bit of oil.
These wouldn't by chance be the two engines, in wheeled stands and with simple props, which were displayed running, side-by-side, at Flying Legends at Duxford some years ago ? They were certainly a big Rolls-Royce in-line and a big Pratt radial.