Hey all,
I was toying around with the Canadian National Archives site looking for some info for my grandfather when I came apon this link for the National Film Board of Canada.
http://mediasphere.nfb.ca/E/index.epl
The World War One section has a couple of 5-10 minute films of aero related footage.
Thought some of you may be interested.
One note, the site is graphic intensive so be patient