Ark Royal's uncovered steel flight deck presented a large surface to the sun. In Goodall's explanation, heat absorbed by that surface radiated into the spaces below. Better ventilation could partly reduce the discomfort, but moving air could not remove the radiant heat itself. The difficulty therefore remained even with a functioning ventilation system.
Notable Point · 3:00:14-3:00:38
Why ventilation could only partly relieve Ark Royal's hangar heat
A sun-heated steel flight deck could radiate heat below faster than ventilation alone could relieve the discomfort.