A Rolls Royce engine which was unlabelled but I think it is a 2,800 hp 'R' racing engine for the Schneider Trophy; in the new Hanger 1 at the RAF Museum, Hendon, 4 December 2018.
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/58433307@N08">Hugh Llewelyn</a> from Keynsham, UK
CC BY-SA 2.0
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/camperdown/32400168298/">Rolls Royce R</a>