Matt Whiting wrote:

Yes, I'm sure weight is another reason, although this could be minimized
if the coolant channels were formed integrally with the leading edge
skins. However, that would then bring back the cost issue.


Matt

Heh, Matt. Why build the complexity of a channel. Use a coolant that
doesn't evaporate and just spray the coolant on the inside of the wing.
Collect it in a sump at the wing root. Considerable dihedral would be
beneficial.