Tobias, Hi!
Excellent work!
The Aerial Torpedo pack contained a Mk13 Torpedo loadout and rack for the PBY. You can easily extract it and add it.
The loadouts of the Catalian are exceptional as they were extremely varied - above all in the RAAF.
From screening the Operation records of the squadrons, the US historical loadouts included:
1000lb Mk5 (Nose Fuze Mk21, tail fuze Mk23)
1000lb Mk9 (Nose Fuze Mk21, tail fuze Mk23)
1000lb Mk13 (Nose Fuze Mk21, tail fuze Mk23)
500lb Mk3-1 (Nose Fuze Mk21 and Tail Fuze Mk23)
500lb Mk9 (Nose Fuze Mk21 and Tail Fuze Mk23)
500lb Mk12 (Nose Fuze Mk21 and Tail Fuze Mk23)
100lb Mk1-3 (nose Fuze Mk19-1) - can be carried in Mk42 bomb racks only
100lb Mk4 (Nose Fuze Mk19-1)
Mines Mk12 Mod 1
Mines Mk13 M3 Mode 2
Some USN aircraft had also some versatile loadouts :
2x 500 lb. + 8x 100lb + 14-15x 20 lb. fragmentation bombs
2x250 lb + 14 to 20 x20lob fragmentation bombs per plane.
4x500lb ANM-64 bombs and 40x20-pound fragmentation bombs
The official British/Australian also included, as a standard, in supplement to bombs, mines and such:
6 Flame Floats MkII (stowed aft of the bulkhead no7 on both sides of the aicraft)
6 Aluminium Sae Markers MkII (stowed aft of the bulkhead no7, two on the port side and four on the starboard sideof the aicraft)
The loadouts found in the FAA/ RAAF operational records included:
1941-1943
up to eight 500 lb GP bombs, or 250 lb GP and AS bombs. As well as these, 20 lb Frags and 30 lb incendiaries were also often carried on the outer wing racks, or internally and thrown out the from the waist positions.
450lb modified naval Depth Charges were superseded by the more efficient 250lb depth charge later in the war but were available into 1942. the Mk VII 450Ib DC was all but replaced by early 1942 in Europe with the Mk VIII 250 Ib DC.
RAAF Cats in the pacific were carrying 3 x 250 Ib DC's under each wing or 4x250lb bombs under each wing
1943 onwards
Australian Black cats with 4 x US 500Ib bombs (2 under each wing)
1944 (RAAF) among many other laodout variations:
8x500lb GP (0.12s)
6x500lb MC (nose safe, tail 0.025s)
8x500lb MC (nose safe, tail 0.025s)
2x2100lbs MkXIII Torpedoes
4x500lb GP
4x500lb GP + 2x250lb GP
2x500lb GP + 6x250lb GP (0.025s) + 5x40lb Frag + 10x30lb Inc
2x500lb GP + 2x250lb GP (0.025s) + 4x250lb SAP (0.12s) + 10x20lb Frag + 10x30lb Inc
2x500lb SAP + 2x250lb SAP (0.12s) + 4x250lb GP (0.025s) + 5x40lb Frag +10x30lb Inc
2x500 SAP (0.12s) + 6x250lb GP (0.025s) + 10x20lb Frag + 10x30lb Inc
4x250 GP (0.025s) + 4x250lb SAP (0.12s) + 10x20lb Frag +10x30lb Inc
4x500lb SAP (0.12s) + 20x30lb Inc
4x500lb SAP (0.12s) + 10x20lb Frag + 10x30lb Inc
4 x 250lb Depth Charges (ASW patrol) D.C. 250 lb Mk. VIII
As a general rule, in the RAAF, no bombs were carried on minelaying operations, only mines.
There is a Photo of a RAAF Catalina with 2 x different mines: the one under the left wing looks to be a US Mk 25 of 2000 Ib , the one under the Right wing is a British Mk IX mine of 1800 Ib.
We have also record of another similar US/Brirtish mines mix
1 x Mk V and 1 x Mk XIII mine (sea mining missions in the East Indies)
The mines used by the RAAF Catalina in the Pacific included:
US made mines:
Mk.12-1
Mk.13-0
Mk.13-5
Mk.25-0
Mk.26-1
Mk.36-1
British Made mines:
A Mk.I-IV
A Mk.V
A Mk.VII
with the following Timeline:
January 1942 - September 1943
Mk.12-1 and Mk.13-0 only
From September 1943
A Mk.I-IV available
From January 1944
A Mk.V available
From April 1944
Mk.13-5 acoustic mine
From June 1944
Mk.26-1
From August 1944
A Mk.I-V of the "G" Group (combination magnetic acoustic assembly)
From October 1944
Mk.25-0 available (capable of operating in depths up top 30 fathoms)
From May 1945
Mk.36-1
A Mk.VII
What really lacks from the armament loadout are the retrorockets - quite a popular loadout on Catalinas after 1943
"
The so-called Retrorocket (a.k.a. "Retrobomb" or VAR - Vertical Antisubmarine Rocket) was developed by the NDRC's group at the California Institute of Technology as a derivative of the Mousetrap ASW rocket. The Retrorocket was a depth charge with a rocket motor pointing in the direction of flight. After the drop from the ASW aircraft, the motor rapidly decelerated the Retrorocket to zero forward airspeed so that it fell essentially straight down. The first air-drop of a Retrorocket from a PBY-5A Catalina occurred on 3 July 1942, making it the first ever launch of a rocket from an American combat aircraft.
Operational aircraft equipped for Retrorocket were fitted with multi-rail launchers, from which the rockets could be fired in groups to lay a rectangular pattern of depth charges into the water. Actual service tests began in December 1942, and in January, three new motors optimized for three different firing speeds were designed. The 7V6 for 330 km/h (205 mph), the 7V7 for 320 km/h (200 mph) and the 7V8 for 640 km/h (400 mph). In the designations, the first digit was the diameter in inches, the "V" stood for "Vertical", and the last digit was the modification number. Later, the TNT explosive was replaced by the more powerful "Torpex", creating the 7V11 through 7V13 rockets. This series became the standard Retrorockets in May 1943.
In Summer 1943, several U-boats were destroyed in the Atlantic by the MAD/Retrorocket combination. However, the system was only effective if the launching aircraft was flying relatively low (< 90 m (300 ft)), and when German U-boats began to fight attacking aircraft with guns on the surface, that tactic became increasingly dangerous. Therefore Retrorockets were gradually abandoned in the final months of the war."
"The retro ASR needed a larger motor to match the forward velocity of the Catalina, so this was increased in size from 2.25” diameter to 3.25.” That would give the retro bomb the necessary 400 ft/sec speed to counter forward motion. The explosive warhead remained 60 lbs. and was armed on the operational model by a hydrostatic fuze similar to those used on depth charges. The weapon did not arm until it entered the water and began to submerge increasing its safety while on the carrying aircraft.
The aircraft mounting consisted of two dozen retro bombs mounted on the wings of a PBY. A shallow metal trough served to guide the launch and protect the wing of the plane. Later, the mountings were increased to 30 per plane.
Three different motors were developed for the operational rocket, based on the expected speed of the aircraft. The 7V6 for 205 mph, the 7V7 for 200 mph, and the 7V8 for 400 mph. By the time the retro bomb went into operational use, the explosive warhead replaced TNT with Torpex, a more powerful explosive. These retro bombs were designated 7V11 and 7V13 and standardized in May 1943.
Diameter 18.3 cm (7.2 in)
Speed 320 km/h (200 mph)
Propulsion Solid-fueled rocket
Warhead 16 kg (35 lb) depth charge"
I'll try to do something....
The mousetrap ASW aboard a US ship
Here's the very similar (but not identical) British clone developed for being ship launched - the HedgeHog
and here some very good pictures of the weapon but under the wing of a OS2U Kingfisher: