Type 91 torpedo
Variants
Below is the list of the series of Type 91 aerial torpedo production models. The Type 91 (modification 2), was a shallow-water aerial torpedo that was designed for and used in the attack on Pearl Harbor in 1941.

Type 91 torpedo

Section Title: Variants
Table Section Text: Below is the list of the series of Type 91 aerial torpedo production models. The Type 91 (modification 2), was a shallow-water aerial torpedo that was designed for and used in the attack on Pearl Harbor in 1941.

Main body	Warhead	High explosive (kg)	Speed (knots)	Range (m)	Total Length (m)	Diameter (m)	Total Weight (kg)	Head Length (m)	Head Weight (kg)	Comments

Type91	Type91	149.5	42	2,000	5.270	0.45	784	0.958	213.5	–

Rev.1	Rev.1	149.5	42	2,000	5.270	0.45	784	0.958	213.5	Supported shedding wooden tail-plates in 1936, first model considered for German LT 850 version

Rev.2	Rev.2	204.0	42	2,000	5.470	0.45	838	1.158	276.5	Body reinforced in 1938, anti-rolling controller added in 1941, 2nd version considered for German LT 850 version

Rev.3	Rev.3	235.0	42	2,000	5.270	0.45	848	1.460	323.6	–

Rev.3	Rev.3_rev.	235.0	42	2,000	5.270	0.45	848	1.460	323.6	Reinforced warhead

Rev.5	Rev.3_rev.	235.0	41	1,500	5.270	0.45	848	1.460	323.6	Precision forging and stainless steel cast body

Rev.5	Rev.7	420.0	41	1,500	5.710	0.45	1080	1.900	526.0	Warhead designed to breach the armor of US battleships

Sentence(s)

The Type 91 rev.1 warhead weighed 213.5 kg with a high explosive charge of 149.5 kg and the rev.2 warhead with 204 kg of high explosive.

final_sentence: The Type 91 rev.1 warhead weighed 213.5 kg with a high explosive charge of 149.5 kg and the rev.2 warhead with 204 kg of high explosive.