http://www.mirror.co.uk/news/world-news/lost-world-war-ii-plane-827855

And to make it interesting, what is that additional movable control surface on the elevators (which are already movable) ? 

Aren't those the Trim Tabs?

Good one anwar sir

This was all over BBC yesterday. very close VC, it is called the Servo tabs (sometimes called a Flettner tab [see image])), Servo tabs are hinged in a manner to move to the opposite side of the control, thereby reducing the control force required to move the controls (Those days, even now in some aeroplanes, controls are moved manually not hydraulically), in some aeroplanes (Like the Devon) pilot moved only the Servo tab, the aerodynamic force of the tab moved the control surface. Downside was, even if there was control locks are put (To prevent controls from fluttering in winds) when pilot moved the controls in the cockpit the stick moved because, he wasn't after all moving the controls he was only moving the tab. There was a crash because of this, hence the check (Fully and free movement of the controls , controls moving in the correct sense, prior to take off)

PS
We could use this in RC, with this probably one could use much smaller servo to move controls of a giant scale, instead of using a high torque expensive servo

Great info sir 

you are welcome sai & VC,  


EDIT
w.r.t two posts below

Removed the quote sir

Thanks! Learnt something new today...................

For those who are interested to know the difference between a Trim and a Flettner Tab, read this:

http://www.thepilotsclub.com/ppl-groundschool/39-flettner-tabs.html

An even more detailed article here http://history.nasa.gov/monograph12/ch6.htm

 

awesome . . . wanna preserve it