Converting all four Admiral-class hulls into raiding carriers

Could all four Admiral-class ships have been converted to carriers in 1917 and raided Germany before the war ended?

Possibly, but only through an urgent coordinated program that accelerates the carriers and their Sopwith Cuckoo strike aircraft together.

The key bottleneck is not merely the hull conversion but getting a suitable aircraft such as the Sopwith Cuckoo into reliable service. A committed 1917 raid program would accelerate both aircraft and carrier work and pack the converted ships with as many strike aircraft as practical. An Admiral-class conversion might carry roughly 100 to 120 Cuckoos and Camels for a first mass strike, although operating such a crowd would expose serious deck-cycle limits. Building the ships along Eagle-like lines would also make unusually tall hangars a precedent for later Royal Navy carrier practice. Whether the force arrives before the armistice depends on how early the Navy treats the operation as an urgent priority.