New machinery could transform HMS Tiger's modernization margin

Would replacing Tiger's 39 boilers with twelve three-drum boilers increase her speed if Britain retained her and recommissioned her in 1937?

Probably. The machinery change could also leave room and tonnage for twin 14-inch mountings, although their fit would be tight and the barbette comparison is recalled from memory.

The proposed 1937 recommissioning assumes that Britain kept Tiger instead of Iron Duke under the London Naval Treaty. Replacing her 39 boilers with twelve three-drum boilers is judged likely to increase speed and leave useful space and tonnage for other changes. Twin 14-inch mountings are suggested as replacements for the 13.5-inch guns. The barbette sizes are recalled as not very different, making the gun substitution a tight but potentially workable fit.