1934
The first and most important business for the FAA was the laying down of the Ark Royal. The new, purpose built carrier had been waited for so long that in some quarters it was almost mythical. Longer term actions were mainly to do with the support and infrastructure of the FAA, which were seen as quite inadequate in view of the expansion in both size and capability expected in the next few years.
What was needed to be done was fairly obvious, although there was, as expected, some dragging of feet among the battleship Admirals. However the new independence and coming equipment gained for the FAA had given those closely concerned with it a sense of optimism that managed to at least find ways around the more restrictive practises being proposed.
The most obvious requirement was for more pilots, and in particular senior pilots. In the past, a small number of naval pilots had been supplemented by RAF pilots, but this was not going to last for long. Accordingly arrangements were made to allow a considerable expansion of the RN pilot training program. Since the increased importance of naval aviation that was coming made it clear more prominence would need to be given to more senior air-aware staff, it was also felt that a better career path for pilots would be necessary. Unfortunately many of the officers who would have made admirable senior officers of this type were now serving in the RAF, having left the RN in 1918; however while it would take time, the process could at least be started. A number of the more flexible senior officers had expressed interest in learning much more about naval aviation and the detailed possibilities it offered, and arrangements were made to develop and include an air staff officer into the staff of the senior admirals.
There was also a considerable exchange of information at lower levels with the USN. While the senior officers in the USN often had issues with the RN, it had been found that aviators liked to talk shop, and getting a few drinks into a US pilot on a hospitality visit was a very good way of comparing tactics and training. As a result some things that the RAF had apparently found 'too difficult', such as over-water navigation and fast strikes were put back onto the training syllabus.
While the new aircraft were looked forward to with considerable anticipation, they wouldn't be ready for some time, so the main aims of the FAA were deemed to be training to increase the pool of skilled pilots (and supporting engineering staff), and examining and testing concepts and tactics that would be possible once the new planes arrived. They would also look at the defensive problem posed by aircraft with the capabilities of those being designed - after all, once the RN deployed planes like those, foreign powers were certain to try and match or exceed them, and it was unclear that the current defensive measure for the fleet could cope with them.
On the construction side, the current effort was finishing the design of the Ark Royal so as not to delay her start. It was still hoped to persuade the treasury that the continuing building of carriers by the Americans and the Japanese meant that more should be ordered, but in the meantime development work shifted to the concept of the Trade Protection carrier, or light carrier as it came to be known.
There were of course issues with the allowed displacement under the London Naval treaty. This allowed the RN 135,000t of carriers. The existing carriers could be discarded at any time, but they still couldn't build all they wanted to. This was a continuing problem due to the global commitments of the navy. The current design was hoped to come in at around 24,000t. Building 5 of these would allow one additional, smaller carrier in the range 12,000t - 15 ,000t, or building 4 would allow 3 smaller carriers (once the existing ones had been scrapped). The current proposal was for a minimum of 4 fleet carriers; this allowed one to be deployed in each main area (Home, Med and the Far East), while allowing for one to be unavailable due to maintenance and refit. If a fifth fleet was built, this allowed a second to be sent to whichever area was under the most threat. The final smaller carrier would normally be used for training, but it would also be available either for deployment or to relieve a fleet carrier in a lower threat area. It was hoped that something more suitable could be done when the talks came up for renewal.
The idea of a smaller carrier for use on the trade routes and to cover commerce raiders had been considered for many years, but with not enough aircraft coming from the RAF to fill the existing carriers, it had always fallen victim to ships considered to be needed more urgently
Such a vessel would be ideal for supporting a hunting group looking for a commerce raider, as its aircraft could cover a far greater area than the cruisers usually assigned to that task. It would also be an ideal support for high value convoys in dangerous waters, and ideally suited to task force support which did not merit the use of a fleet carrier. It was intended such a ship would be of similar cost to a cruiser, and as such could be risked in areas when a fleet carrier would be considered too valuable to risk
Given that the displacement of the fleet carrier was around 25,000t, the first studies of the CVL were around half this. As the vessel was expected to be used and risked as a cruiser, it was important that cost be kept to a minimum , and corners could be cut in a way that wasn't considered sensible for the fleet carrier. The capacity was to be around 25 planes. A number of studies and proposals were investigated, and these slowly consolidated around a proposed ship.
This would displace about 12,500t, and carry 25 aircraft, with space allowed for reasonable maintenance work (as hunting groups were often away from base support for long periods). This would fit in with the displacement limits, and some hope was entertained that small carriers in the 10,000 - 12,000t range might be exclude in future (as they had been until the London treaty), in which case this ship would serve as a model for a slightly smaller ship. Considerable agonising had been done of the fitting of a TDS, as it was felt that the usage of such a ship was such that a torpedo from a submarine would be one of the likely threats. However it was extremely difficult to fit a useful TDS into such a small vessel. A solution was proposed that basically solved the problem by going around it; instead of a TDS, the ship would be well subdivided, and drums would be installed into spaces to provide bouyancy in case of underwater damage. Such a system was planned to be fitted to liners marked down as Auxilliary cruisers. To aid the ships survival, the engine and boiler rooms would be split so one torpedo wouldn't take out both.
In order to keep the displacement down, as well as the cost, it was decided that the ship would only have minimal armour; sufficient for splinter protection except over the magazines where a box would be fitted. It was not expected that a CVL would be used in an area of high air threat - that was, after all, what fleet carriers were for - except in an emergency, and like cruisers performance and capability were more important than protection.
To reduce costs and manning requirements, the ship would not carry a heavy AA armament, instead it would carry 3 x 8 2 pdr systems for self defence.
Since the ship would have to work with cruisers and the fleet, a modified cruiser propulsion plant was proposed that would give a speed of about 29kt.
The Admiralty was still worried about the carriers existing or planned by the USA and Japan. The USA had 2 very large converted carriers, one new carrier (Ranger) coming into service this year and 2 more new designs starting in 1934. All of these carried more planes than Ark Royal would (although the FAA were somewhat disbelieving of the number of operational planes as opposed to just planes carried). The Japanese again had 2 huge conversions, one smaller new carrier and another being laid down this year. To counter this the RN only really had 2 smaller conversions, and one new carrier being laid down shortly. They wanted more new build, and after considerable negotiations with the Treasury, they got funding for the new 'trade protection' ship and a repeat Ark Royal
HMS Illustrious would be laid down in May 1935, to complete in July 1938
HMS Colussus (the new, smaller carrier) would be laid down in June 1935 to commission in November 1937