laststandonzombieisland

Here at LSOZI, we are going to take out every Wednesday for a look at the old steam/diesel navies of the 1859-1946 time period and will profile a different ship each week.

– Christopher Eger

Warship Wednesday,  February 13

This week we are taking a brief look at US K-Class Blimps and their occasional teaming with Escort Carriers during and just after WWII.

On December 6, 1938 a prototype Goodyear blimp was sent to the US Navy’s lighter than air division for testing. This prototype proved so succesful that in October 1940 they ordered six more for use in escort and patrol work offshore. When the US entered WWII, this soon turned into a total of 134 of these 251-foot long helium nonrigid airships delivered by 1955.

The blimps were the P-3 Orion of their day and most of the equipment you are used to on these  sub-busters were present on these airships. They were equipped with the ASG-type radar, that had a detection range of 90 mi (140 km), sonobuoys, and magnetic anomaly detection (MAD) equipment. The K-ships carried four Mk-47 depth bombs, two in a bomb bay and two externally, and were equipped with a .50 in (12.7 mm) Browning machine gun in the forward part of the control car. An aircrew of 10 normally operated the K-ships, consisting of a command pilot, two co-pilots, a navigator/pilot, airship rigger, an ordnanceman, two mechanics, and two radiomen.

After 1942 these airships increasingly started to patrol in concert with small converted merchant hulled ships, dubbed escort carriers. These roughly 10,000-ton ships carried about two dozen aircraft and, while not fast enough for operations with  the fleet, they were perfect for escorting merchant convoys. By pairing up blimps and small carriers, the blimps could be on constant search while the carrier kept depth-charge armed aircraft on alert to chase after sightings. The blimps were the eyes and the carrier planes the lightning of the gods called from above.

It’s unknown how many of these touch-and-gos happened, and if the Navy ever tried to refuel or rearm blimps from the decks of these jeep carriers, but its a possibility. More than a hundred ‘Jeep carriers’ were made during the war but by the late 1950s both the blimps and these hardy little flattops were discarded, replaced by new super carriers and converted Essex class fast carriers. It is known that both during the War and in the 1950s that navy blimps did in fact refuel from large fleet carriers at sea. In 1942 the Doolittle Raid probably wouldn’t have happened if Navy patrol blimp L-6 hadn’t delivered 2 boxes of navigators domes for B-25 to the Hornet while she was several hundred miles offshore.

In a future naval war with a littoral heavily contested by submarines, its possible that this concept could be dusted off once more. There are still blimps, the US still has the world’s largest supply of helium, and merchant ships could readily be converted with decking to carry expeditionary detachments of SH-60 helicopters for local ASW missions.

Stranger things have happened.

By the way, if you know the blimp/carrier involved in the 1944 pictures, let me know. Thanks!

(Specs of the K-class blimp)
Crew: 9-10
Length: 251 ft 8 in (76.73 m)
Diameter: 57 ft 10 in (17.63 m)
Volume: 425,000 ft3 (12,043 m3)
Useful lift: 7,770 lb (3,524 kg)
Powerplant: 2 × Pratt & Whitney R-1340-AN-2 radials, 425 hp (317 kW) each
Maximum speed: 78 mph (125 km/h)
Cruise speed: 58 mph (93 km/h)
Range: 2,205 miles (3,537 km)
Endurance: 38 hours  12 min
Armament

1 × .50 in (12.7 mm) M2 Browning machine gun
4 × 350 lb (160 kg) Mark 47 depth charges

Specs of the Casablanca-class escort carrier (one of the most common in US service)

Displacement:     7,800 tons
10,902 tons full load
Length:     512.3 ft (156.1 m) overall
Beam:     65.2 ft (19.9 m)
Extreme width: 108.1 ft (32.9 m)
Draft:     22.5 ft (6.9 m)
Propulsion:     Two (2) five-cylinder reciprocating Skinner Uniflow steam engines
Four (4) × 285 psi (1,970 kPa) boilers, 2 shafts, 9,000 shp (6,700 kW)
Speed:     20 knots (37 km/h)
Range:     10,240nm at 15 knots
Complement:     Ship’s Company: 860 officers and men
Embarked Squadron: 50 to 56 officers and men
Total Complement: 910 to 916 officers and men.
Armament:

1 × 5 inch/38 caliber gun
16 × 40 mm Bofors guns (8×2)
20 × 20 mm Oerlikon cannons

Aircraft carried: 28

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