Shipbucket

The No. 1-class submarine chaser was a class of submarine chasers of the Imperial Japanese Navy, serving during World War II. The Naval Technical Department (Kampon) made draft shallow to give them high speed. They achieved 24 kt speed hereby. No.1 and No.2 were completed in March 1934, and they were assigned to the 1st Subchaser Division, Yokosuka Naval Defence Squadron, however, because of their very shallow draft they lacked the rolling performance. This fact become evident after the Tomozuru incident.
The Tomozuru incident affected the No.1-class. The No.1 and the No.2 were sent to the Uraga Dock Company in July 1934, and repairs were started. They were equipped 80 tons ballast and mounted a ballast keel. The drawings for the No.3-class boat was also revised, resulting in a shorter vessel with a deeper draft. IJN record lists No.3 as a No.1-class boat but the ship is ofted listed separatedly, she laso had a different project designation than her half-sisters (K4 instead of K3).
No.1 and No.3 survived the war and were later scuttled by the British.

Ch-1 as built:


Ch-2 after refit:


Ch-3 as built:

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My Worklist
Sources and documentations are the most welcome.

-Koko Kyouwakoku (Republic of Koko)
-Koko's carrier-based aircrafts of WWII
-Koko Kaiun Yuso Kaisha - KoKaYu Line (Koko AU spinoff)
-Koko - Civil Aviation

Awesome work!

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MS State Guard - 08 March 2014 - 28 January 2023

The Official IJN Ships & Planes List

#FJB

Good work!

Completed Ch-3, drawing and informations can be found in the first post.

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My Worklist
Sources and documentations are the most welcome.

-Koko Kyouwakoku (Republic of Koko)
-Koko's carrier-based aircrafts of WWII
-Koko Kaiun Yuso Kaisha - KoKaYu Line (Koko AU spinoff)
-Koko - Civil Aviation

Very well done, as always!
I'd love to see you drawing the Ch-4 as well, as the existing version is just not up to par.

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Worklist: Portuguese Navy and Barnegat class seaplane tenders

Seconded! Awesome work on all three!

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MS State Guard - 08 March 2014 - 28 January 2023

The Official IJN Ships & Planes List

#FJB

Nice addition.

Great work!

very nice work. BTW do you have the spesifics of the Ch-3 class?

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Shipbucket mainsite, aka "The Archive"
New AU project "Aravala"

Lenght: 53m (pp), 55m (wl), 56,1m (oa)
beam: 5,6m
draft: 2,1m
displacement: 270T standard. 285T tiral (2/3full).
propulsions: diesel engines 2.500bhp, 2 shafts, 20knots.
range: 1.500nm at 16knots
armament: 2x40mm (twin mount), 36 depth charges.
complement: 60

_________________
My Worklist
Sources and documentations are the most welcome.

-Koko Kyouwakoku (Republic of Koko)
-Koko's carrier-based aircrafts of WWII
-Koko Kaiun Yuso Kaisha - KoKaYu Line (Koko AU spinoff)
-Koko - Civil Aviation