Why an Admiral-class carrier invites twin-engine aircraft

Would larger twin-engine aircraft on converted Admiral-class carriers accelerate the adoption of stronger catapults?

Probably to some extent, because the conversion's space favors long-range twin-engine aircraft whose weight would demand more capable launch arrangements.

The proposed conversion offers enough hangar and deck space to operate aircraft much larger than the Fleet Air Arm's normal interwar types. Twin engines suited the Royal Navy's desire for long-range night strike at a time when a single engine could not provide enough power, range, and torpedo load. Larger aircraft could carry two torpedoes and make better use of a ship whose air group would otherwise be limited by Air Ministry policy and production. Their weight would add pressure to improve catapults and deck handling, an evolutionary consequence rather than an instant design guarantee. Institutional control of aviation could matter as much as the physical dimensions of a carrier. One interpretation is that a stronger Fleet Air Arm threatened the Air Ministry's institutional independence, giving the ministry a reason to limit naval aircraft numbers.