ABC tank in McEvoy shed at Brooklands- off what?

A pre-Christmas quiz - find some photos of the ABC tank propping up the wall in the McEvoy shed at Brooklands - however what is it off? regards Ian

Ian,

It has a donation number, why don't you ask Andrew about its origina?
It looks like a tank that would fit the post Great War machine but I can't find any pictures of prototypes that have tanks that look like that.

Regards,
Roger

Hallo All,
The tank in the photos bears a strong resemblance to the standard ABC-Sopwith tanks of 1920 onwards. So maybe it's from a 1919 prototype, some of which had wet sump (circulatory) engine lubrication systems. Certainly, the specimen tank has no register for an oil pump, but equally clearly, it has an oil reservoir, with connecting union. Some drawings of early (prototype) frames show no suspension points for a fuel tank, and sure enough, the specimen tank relies its own suspension-brackets, from a frame top-tube.
I rest my case! Paul.