Before HMS Renown becomes the reference, the build tests which 1890 hull category can carry Thunder Child's fictional requirements. The available armoured-cruiser and battleship forms must work with coal firing, basic steam machinery, iron or compound protection, and restricted engine efficiency. Narrowing the beam and reducing draft produces the low "armoured canoe" profile, but the machinery still needs enough funnel area to function. The sequence turns a literary description into a period-technology problem without granting the ship an anachronistic combination of speed, armour, and weapons.
Chapter · 3:34-11:23
Turning Thunder Child into an 1890s warship design
The first design attempt turns Thunder Child's low profile and speed into a problem bounded by 1890s hulls, machinery, armour, and funnel capacity.