Mast Head T Foil?

So, I alluded to it in banter over on the kicker attachment thread, but it's been an idea I've been toying with, initially as a cure for turning turtle but with the secondary consideration of a power boost by converting tip turbulence to power generating flow at the head of the sail. Obviously it would only function with fathead sails, but what do the hive mind think?

Could such a thing be beneficial to the point main sail size reduction might even be possible?

How such a thing could be constructed, I'd suggest kite technology from kite surfing, so a bow leading edge secured with a central batten down the middle of the foil so it is two sided the central batten attaching to the top or top batten of the sail.

The result would be a wing tip foil closing the head. With the spin off of course of a mast head float.

Thoughts?

Edited by iGRF - 29 Oct 14 at 9:50am

Oh no did we already?

Nurse! I need some more of those memory tablets..

It doesn't work; aerodynamics 101. You are better off using the same weight, area and complication to increase the mast height.

I thought it was used on aircraft as they are restricted by space in airports where the wings can only have a maximum width. 

Increasing the mast height as well as adding weight it adds leverage and heeling moment, so if the mast height could be reduced, or if a boat already has a given mast size, but the addition of a light foil up top which could tidy up the vortices up there and probably add area for downwind running and reaching due to the resulting upward swing as the boat heels, I'd like to see empirical evidence of it having been tried before writing it off.