Do aircraft tyres have inner tubes?
From this Goodyear document on aircraft tires, both types exist. For the 747, they are all tube-type.


  Tires are tube-type unless otherwise indicated.


The listed 747 civilian variants do not indicate otherwise (page 18).


(Source: wikimedia.org) Cross section of a 747 tire. Full resolution via link is a must see. You can make out the inner tube (flap) from this image.



But that document is from 2002, nowadays tubeless tires are also available for the 747 and many commercial types, for example the 49X19.0-20 Flight Leader by Goodyear (thanks @user71659).