I've had a quick trawl through all the single seat biplanes without success; I may have missed it of course, but I suspect that it has been cunningly chosen from one of the many biplanes that don't carry the helpful code
!!
So until details of the (radial) engine, or the revelation that there are other hidden seats emerge, I shall have to withdraw and attend to the waiting chores
. Back later!
Edited to say same here on temperature. The birds seem convinced it's spring, but they don't know what's happened on the Eastern seaboard of the USA, we usually cop it a couple of weeks later!!