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Jun 26 17 tweets 6 min read Read on X
The missing link to make sense of the SDR and recent decisions on air power is a major ACP (Loyal Wingman) programme for both RAF and FAA.

This is an SDR recommendation and needs to be properly funded (billions), but is unlikely to get those resources until after 2029. Image
Introduction of an ACP to FAA needs to be timed with a 2030s MLU of the carriers, but can enter service earlier with the RAF, initially as part of UK IAMD and for the SEAD/DEAD mission, increasing mass in the fast jet force. Image
BAE and MHI have begun cooperation on ACP designs for GCAP, and Boeing Australia is looking for European partners to develop MQ-28 Ghostbat. General Atomics and Anduril are flying new lower cost designs for USAF, and Airbus and Saab have both shown concepts. Image
Affordable designs are more likely to be attractive to the RAF and could be fielded relatively quickly if resources are made available. They also have the advantage of needing less powerful catapults if adopted by FAA. Anduril's YFQ-44A Fury, for exmaple. Image
General Atomics YFQ-42 is another 'fighter drone' - smaller, lower cost and more agile - than the larger 'bomb truck' strike drones such as MQ-28 and XQ-58. The former is probably attractive for both the RAF and FAA for IAMD, and could be fielded sooner. Image
Dassault is pursuing a development of its Neuron drone as a heavyweight strike drone to accompany Rafale and SCAF. This is a much larger stealthy platform, designed to increase the strike potential of the realtively small Rafale and SCAF crewed platforms. Image
Given that GCAP has evolved into a much larger crewed deep strike platform, RAF and FAA may be more interested in a agile 'fighter' drone initially, for increasing IAMD mass, freeing Typhoon, F-35 and GCAP for the strike mission alongside long range drones and missiles. Image
FAA needs a tanker for F-35B, this could point to the MQ-25 Stingray, which can also provide a high flying communications node for the new 'Digital Targeting Web'.

MQ-25 will need the carriers to aquire a relatively large EMALS during MLU, which could also launch strike CCAs. Image
For now the RAF's only major autonomous programme remains MQ-9B, although a tiny investment in 24 of Tekever's AR3 ISR drones was announced earlier in the year. This will need to change if the F-35 mix leans towards 'A' over 'B' to enable a 'hybrid air wing' on the carriers. Image
Leonardo have partnered with Baykar to develop drones in Italy, and one idea floated for GCAP is an autonomous variant of Leonardo's M-345/6 jet trainer, and Turkey has tested its Anka-3 stealthy combat drone and Kizilelma 'fighter' drone. Image
France, Italy and Germany are all moving forward rapidly on CCA/ACP programmes for SCAF and GCAP and Italy has chided the UK for dragging its feet, despite a blizzard of strategiies on autonomous systems. The US, Australia, Turkey and Japan are all moving rapidly to aquire CCAs. Image
Despite the rhetoric on autonomy the RAF has been slow to invest in R&D or systems when compared to our peers and adversaries. LANCA/Mosquito was never properly funded and the fanfare over 'swarming drones' proved farcical. Taranis was abandoned when UK had the leading edge. Image
This stands in sharp contrast to the navy, which has invested heavily in both autonomous R&D and systems and now has mature programmes such as the Anglo-French autonomous MCM system, 'Proteus' ASW drone, 'Peregrine' ISR drone, 'Cetus' XLUUV and Patrick Blackett resarch vessel. Image
These are now leading to an autonomous shipbuilding programme for Type 91 Arsenal Vessels, Type 92 ASW Sloops and Type 93 XLUUV Chariots.

Air Command has to take autonomy seriously, not only are they falling behind, but making decisions which make no sense without ACP/CCAs. Image
All of our peers have invested in CCA/ACP programmes, including our GCAP partners and France, Australia, Sweden and Germany. Air command has not done more than spend nominal sums to keep the rhetoric alive. RAF is prioritising its desire for more crewed E7, F-35A and more A400M. Image
Over keeping ahead of the technological curve. This is a false economy and will have long term damaging effects on the UK defence industrial base if we have no capability to develop, manufacture and export ACP/CCAs in a market that will be dominated by these systems mid-century. Image
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More from @FennellJW

Jun 18
With the prospect of the RN getting a new Type 92 sloop, I though I'd take a look at the history of the 'sloop' in the Royal Navy.

Sloop is an anglicised Dutch term, meaning a small flat bottomed ship, adopted by the Royal Navy from the 17th c. for small second class warships. Image
During the 18th and early 19th centuries the sloop was formalised as an unrated single gundeck warship of 18 guns, under the command of a 'Master and Commander' rather than a post Captain. Smaller than frigates, they were used for trade protection on distant outposts. Image
The sloop was the RN's equivalent to the French Navy's 'corvette' and were usually the first command for the Royal Navy's junior officers.

During the 19th century the type was adapted for colonial service, with a mixture of both sail and steam for patolling distant stations. Image
Read 31 tweets
Jun 17
Hunt class escort destroyers.

Concerned that the new classes of large fleet destroyers were unsuited for convoy escort duties, a new type of small escort destroyer was designed in 1938-9.

The design was for a 1,000 ton ship based on the Bittern class colonial sloops. Image
Like the Bitterns, they would be built to naval standards, but power was raised from 3,300 to 19,000 shp on two shafts, giving a speed of 28 knts.

This resulted in considerable loss of range, making them only really suitable for North Sea and Mediterranean service. Image
In littoral waters their main opposition was to be enemy torpedo boats and fast attack craft, aircraft and submarines, and they were armed accordingly.

Designed for six 4" HA in three twin mounts, the first group were top heavy, and one was replaced by a quadruple 40mm pom pom. Image
Read 11 tweets
Jun 17
O & P class destroyers formed the 1st and 2nd Emergency Flotillas, and were the first wartime emergency classes.

Stripped down J-class hulls with raised fo'castles that could be built quickly, the 'O' class had four 4.7" low angle guns, similar to the earlier pre-war classes. Image
The 'P' class were armed with five 4" HA guns for improved AA performance.

Both classes were optimised for escorts duties with only four 21" torpedo tubes.

AA armament was a quadruple 40mm pom pom and six 20mm Oerlikon guns, four on power operated twin mounts. Image
Completed in 1941-2, these sixteen ships played pivotal roles in the RN's mid-war naval battles, including the Battle of the Barents Sea.

The 'O' class were assigned to the Home Fleet and all survived the war but 4 of 'P' class were lost to enemy action in the Mediterranean. Image
Read 6 tweets
Jun 17
Weapon class destroyers were the last RN wartime design, a larger follow-on to the War Emergency Classes, which could be built in yards too small for the Battle class.

Armament was similarly arranged to the Battles, with four 4" guns in new twin power operated mountings forward. Image
They had a heavier torpedo and ASW armament than the Battles - 10 torpedo tubes and twin 'squid' ASW mortars, and were optimised for ASW escort of carrier groups.

Secondary AA armament was two twin STAAG radar guided 40mm bofors mounts and four single 40mm bofors mounts. Image
20 ships were planned, of which 13 were laid down in 1944-5, but only 4 were completed.

These four orphans, Battleaxe, Broadsword, Crossbow and Scorpion were upgraded as radar pickets in the late 1950s and had long lives, serving until the early 1970s as carrier escorts. Image
Read 4 tweets
Jun 16
The L & M class destroyers were the last classes laid down for the Royal Navy before the war in 1938-9.

They were larger and more complex ships than the J, K and N classes, incorporating three power operated twin 4.7" dual-purpose gun barbettes as main armament. Image
Four were completed with four twin 4" HA mounts in place of the 4.7" barbettes, and it was found the better AA performance and higher rate of fire of the 4" guns offset the loss in weight of shot.

Secondary AA armament was a quadruple 40mm pom pom and four twin 0.5" HMG mounts. Image
Eight 21" torpedo tubes were fitted as standard, although the 4.7" armed ships had the aft bank of four tubes removed later in the war to make room for additional AA armament. Image
Read 7 tweets
Jun 16
The J, K and N class, were built during the run-up to war, and were smaller and cheaper versions of the Tribals. They swapped two 4.7" guns for two extra torpedo tubes.

Five 'N' class were all crewed by the RAN, two by the Dutch Navy in exile and one by the Polish navyin exile. Image
As some of the most modern destroyers in Royal Navy service during the first two years of the war, they were heavily engaged in the Atlantic, Mediterranean and Inidan Ocean, and 13 of the 24 ships were lost - mostly to aircraft while on convoy escort duties in the Med. Image
J & K class had a secondary armament of a quadruple 40mm pom pom AA mounting and two twin power-operated 20mm Oerlikon mounts.

The N class differed by having a single 4" HA mount, six manual single 20mm Oerlikon mounts and two twin 0.5" HMG AA mountings. Image
Read 6 tweets

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