From Flight JANUARY 17, 1929
The maln wing ribs are of Duralumin and take the form shown in 1 and 2.   The Bristol-Frise ailerons are illuslrated in 3 and 4.    The manner of attachfng the fabric over the rear spar to house the aileron is shown in 5 and 6. while 7 shows a complete rib.