Thank you, Andreas! I was fortunate enough to see a Le Rhone powered Sopwith Camel in flight at Javier Arango's facility in Paso Robles during the League of WWI Aviation Historians convention in Monterey, CA, in 2011. When the Camel landed, oil was all over the cowling and undercarriage. I took photos and have been using those as a guide ever since.
Cheers,
Bud