Thankyou AA. That is about as definitive as information gets!

My systems at model scale will be hugely simplified, but there is a wealth of information in there that will be most valuable – even the actual section of the tailplane which I can now lift off and incorporate. It may not be drawn exactly but it will be a lot closer than my guesses based on a tiny 3-view drawing!

Baz, I bow to your age and experience! When Belfasts and Britannias were operating I was in no state to know what I was looking at (beyond recognising the type).

I would have expected the ailerons to be mass balanced anyway as to my mind ailerons hanging down would offer air resistance and slow the rate of acceleration in the early stages of the take-off run. It can’t have been thought a serious consideration.

Thanks to all responders – I consider myself sated!

Robin