Jet Engine List

This page is a list of all the known rocket & jet engines for aircraft that were developed by Japan during World War II, including production, prototypes, and paper.
At the bottom of this page, the naming conventions are described.

Last Update JAN 21 2024

Rocket:

Engine Name	Format	Mean Thrust	Weight	Fuel	Len. x Dia.	Fuel Cons.	Designer	Mfr.	Service	Notes
4FR110 四式一號噴進器一〇型 Type 4 Mk.1 Rocket Mod.10	Solid Rocket	700kgf ~3.0s	11.2kg (powder) 30.8kg	343 Special FDT₂	1,184x193mm	3.73kg/s	Kūgishō	1st Navy Air Arsenal	Navy	carrier RATO for Tenzan etc
4FH110 四式一號噴進器一〇型 Type 4 Mk.1 Rocket Mod.10	Solid Rocket	400kgf ~10.0s	22.2kg (powder) 70kg	500 Special FDT₆	1,290x257mm	2.22kg/s	Kūgishō	1st Navy Air Arsenal	Navy	aerial wing booster, Ōka Mod.11
4FR120 四式一號噴進器二〇型 Type 4 Mk.1 Rocket Mod.20	Solid Rocket	800kgf ~10.0s	43.9kg (powder) 120kg	500 Special FDT₆	1,790x257mm	4.39kg/s	Kūgishō	1st Navy Air Arsenal	Navy	RATO for large planes
4FH120 四式一號噴進器二〇型 Type 4 Mk.1 Rocket Mod.20	Solid Rocket	800kgf ~10.0s	43.9kg (powder) 120kg	500 Special FDT₆	2,090x257mm	4.39kg/s	Kūgishō	1st Navy Air Arsenal	Navy	Ōka Mod.11 engines
4FH121 四式一號噴進器二一型 Type 4 Mk.1 Rocket Mod.21	Solid Rocket	800kgf ~10.0s	43.9kg (powder) 120kg	500 Special FDT₆	1,790x252mm	4.39kg/s	Kūgishō	1st Navy Air Arsenal	Navy	aerial fuselage booster, Suisei Mod.43
4FH130 四式一號噴進器三〇型 Type 4 Mk.1 Rocket Mod.30	Solid Rocket	400kgf ~10.0s	22.2kg (powder) 87kg	500 Special FDT₆		2.22kg/s	Kūgishō	1st Navy Air Arsenal	Navy	Ōka trainer engine
4FR140 四式一號噴進器四〇型 Type 4 Mk.1 Rocket Mod.40	Solid Rocket	2,100kgf ~3.5s	44kg (powder)	343 Special FDT₂		12.57kg/s	Kūgishō	1st Navy Air Arsenal	Navy	Ōka Mod.43 catapult cart rockets
特呂一號一型 Toku-Ro Mk.1 Mod.1*	Liquid Rocket	130kgf (150kgf)		H₂O₂	820x[?]mm		Mitsubishi	Mitsubishi	Army	Ki-148 engine, Ki-48, Ki-102 aux?
特呂一號二型 Toku-Ro Mk.1 Mod.2*	Liquid Rocket	240kgf (300kgf)		H₂O₂			Mitsubishi	Mitsubishi	Army	Ki-147 engine, (Ki-67 aux?)
特呂一號三型 Toku-Ro Mk.1 Mod.3*	Liquid Rocket	500kgf		H₂O₂			Mitsubishi	Mitsubishi	Army	Maybe 2 Mod.2s taped together, Ki-109 aux
KR10 特呂二號 Toku-Ro Mk.2	Liquid Rocket	1,500kgf	170kg	Ro-Gō Otsu Fuel	2,523x904mm	8.75kg/s	Mitsubishi	Mitsubishi, Kūgishō, Army Air Arsenal	Navy/Army, Army control	Shūsui engine
KR20	Liquid Rocket	1,500kgf	170kg	Ro-Gō Otsu Fuel	2,523x904mm	8.75kg/s	Mitsubishi	Mitsubishi	Navy	Shūsui engine, thicker turbopump shaft
KR22	Liquid Rocket	1,500kgf	170kg	Ro-Gō Otsu Fuel	2,523x904mm	8.75kg/s	Hiro Arsenal	Hiro Arsenal	Navy	Shūsui engine, triple turbopump shaft support
特呂三號 Toku-Ro Mk.3	Liquid Rocket	1,500kgf +80~400kgf		Ro-Gō Otsu Fuel			Army Air Arsenal		Army	Toku-Ro Mk.2 + cruise rocket
特呂四號 Toku-Ro Mk.4	Liquid Rocket						Army Air Arsenal		Army	unknown

*Toku-Ro Mk.1 specs are very contradictory between both primary and secondary sources, not positive on data or use

Turbojet:

Engine Name	Format	Output	RPM	Weight	Len. x Dia.	SFC	Designer	Mfr.	Service	Notes
TR	1C-AN-1AT	300kgf	16,000				Kūgishō	Ebara	Navy	1st IJN jet
ネ3 Ne-3	3A-AN-1AT	350kgf	8,300	309kg	2,321x760mm	2.9kg/kgf/hr	Giken	Kawasaki	Army	1st IJA turbojet
ネ4 Ne-4	1C-AN-1AT	280kgf	11,000	270kg	1,700x750mm	2.5kg/kgf/hr	Giken	Kawasaki	Army
TR10・ネ10 TR10/Ne-10	1C-AN-1AT	300kgf	16,000		1,600x850mm		Kūgishō	Kūgishō, Mitsubishi, Hitachi Mfg, Ishikawajima Air, IST, Nakajima	Navy	improved TR for trial and error production
TR10改・ネ10改 TR10 Kai/Ne-10 Kai	4A+1C-AN-1AT	300kgf	15,000				Kūgishō	Kūgishō	Navy	Ne-10 + 4 axial stages
TR12・ネ12 TR12/Ne-12	4A+1C-AN-1AT	315kgf	15,000	388kg	2,102x854mm		Kūgishō	Kūgishō	Navy	original Kikka engine
TR12改・ネ12B TR12 Kai/Ne-12B	4A+1C-AN-1AT	320kgf	15,000	315kg	1,800x855mm	1.65kg/kgf/hr	Kūgishō	Kūgishō, Yokosuka Yard	Navy	lightened Ne-12
TR15・ネ15 TR15/Ne-15	8A-AN-1AT	320kgf					Kūgishō		Navy	Ne-20 predecessor plan
TR20・ネ20 TR20/Ne-20	8A-AN-1AT	490kgf	11,000	470kg	2,704x620mm	1.36kg/kgf/hr	Kūgishō	Kūgishō, Yokosuka Yard, IST	Navy	Kikka/Oka 33&43 engine
ネ20改 Ne-20 Kai	6A-AN-1AT	650kgf	11,000				Kūgishō		Navy	Kikka fighter engine
TR30・ネ30 TR30/Ne-30	4A+1C-AN-1AT	850kgf	15,000	900kg	2,470x1030mm	1.29kg/kgf/hr	Kūgishō	Kūgishō	Navy	upscaled Ne-10 Kai
ネ130（ネ201II) Ne-130 (Ne-201II)	7A-AN-1AT	908kgf	9,000	900kg	3,850x850mm	1.28kg/kgf/hr	Kōken, Giken	IST	Army	Ki-201 engine
TR140・ネ140 TR140/Ne-140	9A-AN-1AT?	~4,000hp equiv.					Kūgishō	Kūgishō, IST	Navy	converted GTPR
TR230・ネ230 TR230/Ne-230	7A-AN-1AT	885kgf	8,100	870kg	3,430x762mm	1.32kg/kgf/hr	Nakajima	Nakajima, Hitachi Mfg.	Army/Navy	Ki-201 engine
TR330・ネ330 TR330/Ne-330	7A-7C-1AT	1,320kgf	7,600	1,200kg	4,000x880mm	1.40kg/kgf/hr	Mitsubishi	Mitsubishi, Niigata	Army/Navy	R2Y2 engine

Engine Jet:

Engine Name	Format	Output	RPM	Weight	Len. x Dia.	SFC	Designer	Mfr.	Service	Notes
TR金物・MTPR TR Hardware, MTPR	Prop-‘Atsuta’-(?)C-AN-(?)T	3,000hp +1,000kgf					Hitachi Mfg.	Hitachi Mfg.	Navy	Navy DB601-based jet. compound engine, linking of turbojet and piston engine driving prop

Motorjet:

Engine Name	Format	Output	RPM	Weight	Len. x Dia.	SFC	Designer	Mfr.	Service	Notes
栄IPR Sakae IPR	‘Sakae’-5A-AN	604kgf			4,169x912mm		Kūgishō	Kūgishō	Navy
誉IPR Homare IPR	‘Homare’-3A-AN	1,396kgf					Kūgishō		Navy
ネ1 Ne-1	Engine-2A-AN	190kgf			1,050x750mm	3.9kg/kgf/hr	Giken	Kawasaki	Army	auxiliary engine for Ki-48II
ネ2 Ne-2	Engine-1C-AN	150kgf					Giken	Kawasaki	Army	auxiliary engine for Ki-48II
ネ101 Ne-101	‘Ha-40’-1A-AN	1,000kgf					Giken, Kōken		Army	Army DB601-based jet
初風ロケット・ツ11 Hatsukaze Rocket, Tsu-11	‘Hatsukaze’-1A-AN	220kgf	9,000	200kg	2,200x640mm	4.33kg/kgf/hr	Kūgishō	Hitachi Air.	Navy	original Kikka substitute engine

Turboprop:

Engine Name	Format	Output	RPM	Weight	Len. x Dia.	SFC	Designer	Mfr.	Service	Notes
GT金物・GTPR GT Hardware, GTPR	Prop-16A-AN-5AT	3,000hp +2,000hp (equiv. thrust)	5,300				Kūgishō	Kūgishō, IST	Navy	for large flying boat
GTPR II	Prop-12A-AN-5AT	3,000hp +2,000hp (equiv. thrust)	5,000	2,500kg	5,500x850mm		Kūgishō	Kūgishō, IST	Navy	iterative design of GTPR
ハタ1・研八・ネ201 Ha-Ta 1, Ken-8, Ne-201	Prop-19A-4C-5AT	1,870hp +582kgf	4,200	2,500kg	5,750×1,100mm	0.68kg/shp/hr	Kо̄ken	IST	Army	only completed turboprop

Ramjet:

Engine Name	Format	Output	RPM	Len. x Dia.	SFC	Designer	Mfr.	Service	Notes
90×360 Ramjet	AN		0	360x90mm		Kayaba Works	Kayaba Works		scale test model
200×600 Ramjet	AN		0	600x200mm		Kayaba Works	Kayaba Works		scale test model
Self-starting Ramjet	Prop-‘Kamikaze’-AN		1,800 (Kamikaze)	5,000x[?]mm		Kayaba Works	Kayaba Works		poor performance as Kamikaze obstructed air
一型 Model 1	AN	750kgf (M=0.9)	0	4,500×1,040mm		Kayaba Works	Kayaba Works	Army	ramjet for tailless plane, commissioned by Army
ネ0 Ne-0	AN	60kgf (M=0.4)	0	2,100x600mm	9.8kg/kgf/hr	Kōken	Kawasaki	Army	1st Army jet
未知 Unknown	AN		0	4,000×1,000mm					unknown 1943 ramjet. maybe Mitsubishi

Pulsejet:

Engine Name	Format	Output	RPM	Weight	Len. x Dia.	SFC	Designer	Mfr.	Service	Notes
㋕・カ10 Maru-Ka, Ka-10	Valve-AN	300kgf	0	150kg	3,700x580mm	3.84kg/kgf/hr	Kūgishō	Kūgishō, Sagami Arsenal	Navy	based on V1 Argus engine
カ10（小型） Ka-10 (Small)	Valve-AN		0				Kūgishō	Kūgishō	Navy	prototype of Ka-10

Navy Solid Rocket Naming System

1st Number: Type designation
Lettering:
- F = ‘Funshin-ki’ 噴進器 (Rocket) [?? otherwise English ‘for’]
  - R = ‘Ririku’ 離陸 (Takeoff) [takeoff booster use]
  - H = ‘Hikouki’ 飛行機 (Airplane) [mid-air booster use]
2nd Number: Mark designation
Remaining Numbers: Model designation

Examples:
4FR110 = Type 4 Mark 1 Rocket Model 10 (for Takeoff)
4FH120 = Type 4 Mark 1 Rocket Model 20 (for Airplane)

Army Early Jet Engine Naming System (Before Autumn 1944)

Prefix:
- ‘Ne’ = ‘Nenshō Funsha Suishin-ki’ 燃焼噴射推進器 (Combustion Jet – Jet Engine)
First Number:
- no = low power class engine
- 10 = medium power class engine
- 20 = high power class engine
Last Number:
- Engine number in the series, with first as 1

Examples:
Ne-2 = low power class engine 2
Ne-201 = high power class engine 1

(note – this explanation is the author’s theory.)

Navy Early Jet Engine Naming System (Before Autumn 1944)

Prefix:
- ‘TR’ = Tābin Roketto タービンロケット (Turbine Rocket – Turbojet)
First Number:
- none = made by Kūgishō
- 1 = made by Ishikawajima Shibaura Turbine
- 2 = made by Hitachi/Nakajima
- 3 = made by Mitsubishi
Mid Number:
- 1 = 1,000hp class equivalent
- 2 = 2,000hp class equivalent
- 3 = 3,000hp class equivalent
- 4 = 4,000hp class equivalent
Last Number:
- Engine variant in that series, with first variant as 0

Examples:
TR10 = Kūgishō 1,000hp-class jet, variant 1.
TR12 = Kūgishō 1,000hp-class jet, variant 3.
TR140 = Ishikawajima 4,000hp-class jet, variant 1.

Army/Navy Unified Jet Engine Naming System (After Autumn 1944)

Prefix:
- ‘Ne’ ネ = ‘Nenshō Funshin-ki’ 燃焼噴進器 (Combustion Jet – Jet Engine)
- ‘Ka’ カ = ‘Kanketsu Nenshō Roketto’ 間歇燃焼ロケット (Intermittent Combustion Rocket – Pulsejet)
- ‘Tsu’ ツ = Unknown (Motorjet)
First Number:
- none = made by Kūgishō
- 1 = made by Ishikawajima Shibaura Turbine
- 2 = made by Hitachi/Nakajima
- 3 = made by Mitsubishi
Mid Number:
- 1 = 1,000hp class equivalent
- 2 = 2,000hp class equivalent
- 3 = 3,000hp class equivalent
- 4 = 4,000hp class equivalent
Last Number:
- Engine variant in that series, with first variant as 0

Examples:
Ne-20 = Kūgishō 2,000hp-class jet, variant 1.
Ne-330 = Mitsubishi 3,000hp-class jet, variant 1.