I finally got around to redrawing my old K class blimp
(which was actually rather pathetic looking back, but I guess I can say I am the pioneer of LTA on Shipbucket.
To start, the ZNP-K of World War II with the "early" control car model. Note the forward-firing .50-caliber machine gun on its own level above the flight deck. No radar or external hardpoints for bombs and depth charges had been added yet.
Next, the ZNP-K of World War II, this time with the "late" model control car. The forward-firing .50-caliber MG has been retained. A radar set was added below the engines and hardpoints for bombs appear. Note also the revised aft section of the control car with "clamshell" doors opening to the rear. This replaced a single door opening to starboard in the aft section of the car.
Next, the K-120 as an experimental rescue airship.
Next, the ZP3K. The Navy changed the designations twice during the early part of the Cold War - airships that were once ZNP-K became ZPK. The ZP3K is a modification of the ZNP-K.
Note the entirely rebuilt aft section, with a towed sonar and a powerful winch for recovering seawater ballast while underway (the small bag hanging from the aftmost overhang). The forward .50-caliber MG deck has been plated over.
Finally, the ZP4K or ZSG-4. This was an entirely new design from Goodyear which only resembled the previous K class airships. The envelope size was increased (accounting for about 15 feet of additional length over the ZP3K). The control car was redesigned. New engines were fitted (note their streamlined nature). The aft section featured the towing sonar and winch from the ZP3K models, and also added a bubble window in the rear. Provisions to refuel at sea were fitted ahead of the car (see the different devices suspended from the envelope).
Next, the follow-on type ZP5K. This was also an entirely new design and really bears no resemblance to the previous K ships. Note the control car which is very similar to that of the N class. There are aft clam shell doors and a stowed towing sonar below the rear section. This airship was designed for long duration anti-submarine patrols. Most distinctive part is the inverted Y-shaped control surfaces, contrasting with the previous cruciform (+) and later X configurations.
I chose not to draw panel lines on each control car, because under the Shipbucket Golden Rule, if you can't see it from the distance from which the real thing would appear the same size as the drawing, then it should not be depicted.
Also, here's the original for comparison. Note that "K-1" was actually a prototype design for the later K-ships, so depicting "K-1" as if it was indicative of the class is entirely incorrect. This should hopefully demonstrate the value of careful research.
Furthermore, it showcases typical late and post-war control car features, such as a towed sonar and external depth charges... don't be an amateur like I was back in 2008.