[Sutts]

I don't see this as a squabble at all. It's been a useful and interesting discussion with opportunities to learn new things. Oleg asked whether the flames were too yellow on the running engine. From all the evidence and experience posted here it is clear that yellow flames are generally only expelled on initial start up or when the engine is damaged in some way.

Correct me if I'm wrong but I haven't seen one video here showing regular yellow flames coming from a running engine. All are either blue or red once the initial startup is complete. Also no night shots show the side panels being lit up by the exhaust flames. That backs up my personal experience from 2 night runs on a Lanc and a Merlin Spitfire.

I think the thread has done its job well.