Would it be possible to construct an aircraft carrier entirely of wood?

No, according to that Swedish expert in traditional ship rigging I was quoting the other day. He says there is an inherent size limit on wooden ships: “Beyond about 50 meters, wooden hulls would break their backs, wooden masts would snap, or rigs would fail.” 

(Tom note: Yes, wooden ships longer than 50 meters have been built, but many were barges and such. Actual wooden sailing ships longer than 50 meters often had problems with sagging and hogging and so leaked.)

Photo credit: Wikimedia Commons