Combined Arms Research Library Digital Collection at Fort Levernworth USA contains a large number of Wartime documents which may be of use to researchers of the RAF.
Searching for "R.A.F" will bring up documents such as R.A.F Middle east and Meditereanian reviews etc.
Searching for "Market" brings up the plans for the Arnhem assault, the link below is for "38 Group Operational order No.256 for Operation Market"
Link below is for the Combined Operations Staff Note book for 1945 (Far East Operations), details throughout on the RAF's role in beach assault. forward air control, equipment etc.

Detailed plans and maps for D-Day are to be found by searching for "Bigot", "Overlord", "Onwest", "Neptune" etc
There are manuals covering Aircraft bombs, ammunition, bombing effects etc

Hope this is of use,