N-II (rocket)

	The N-II rocket
Function	Carrier rocket
Manufacturer	McDonnell Douglas (design); Mitsubishi Heavy Industries (production)
Country of origin	United States (design); Japan (production)
Size
Height	35 metres (115 ft)
Diameter	2.44 metres (8.0 ft)
Mass	132,690 kilograms (292,530 lb)
Stages	2 or 3
Capacity
Payload to LEO
Mass	2,000 kilograms (4,400 lb)
Payload to GTO
Mass	730 kilograms (1,610 lb)
Associated rockets
Family	Delta
Launch history
Status	Retired
Launch sites	Tanegashima, Osaki
Total launches	8
Success(es)	8
First flight	11 February 1981
Last flight	19 February 1987
Boosters – Castor 2
No. boosters	9
Powered by	1 TX-354-3
Maximum thrust	258.9 kilonewtons (58,200 lbf)
Specific impulse	262 sec
Burn time	37 seconds
Propellant	Solid
First stage – Thor-ELT
Powered by	1 MB-3-3
Maximum thrust	866.7 kilonewtons (194,800 lbf)
Specific impulse	290 sec
Burn time	270 seconds
Propellant	RP-1/LOX
Second stage – Delta-F
Powered by	1 AJ-10-118F
Maximum thrust	41.3 kilonewtons (9,300 lbf)
Specific impulse	280 sec
Burn time	335 seconds
Propellant	HNO3/UDMH
Third stage (optional) – Star-37E
Powered by	1 solid
Maximum thrust	68 kilonewtons (15,000 lbf)
Specific impulse	284 sec
Burn time	42 seconds
Propellant	Solid
Third stage (alternative, optional) – Burner-2
Powered by	1 solid
Maximum thrust	43.6 kilonewtons (9,800 lbf)
Specific impulse	285 sec
Burn time	42 seconds
Propellant	Solid

The N-II or N-2 was a derivative of the American Delta rocket, produced under licence in Japan. It replaced the N-I-rocket in Japanese use. It used a Thor-ELT first stage, a Delta-F second stage, nine Castor SRMs, and on most flights either a Star-37E or Burner-2 upper stage, identical to the US Delta 0100 series configurations. Eight were launched between 1981 and 1987, before it was replaced by the H-I, which featured Japanese-produced upper stages. All eight launches were successful.

Launch history

Flight No.	Date / time (UTC)	Launch site	Payload	Orbit	Launch outcome
7(F)	11 February 1981 08:30	Tanegashima	ETS-4 (Kiku-3)^[1]	GTO	Success
7(F)
8(F)	10 August 1981 20:03	Tanegashima	GMS-2 (Himawari-2)^[2]	GTO	Success
8(F)
10(F)	4 February 1983 08:37	Tanegashima	CS-2A (Sakura-2A)^[3]	GTO	Success
10(F)
11(F)	5 August 1983 20:29	Tanegashima	CS-2B (Sakura-2B)^[3]	GTO	Success
11(F)
12(F)	23 January 1984 07:58	Tanegashima	BS-2A (Yuri-2A)^[4]	GTO	Success
12(F)
13(F)	2 August 1984 20:30	Tanegashima	GMS-3 (Himawari-3)^[2]	GTO	Success
13(F)
14(F)	12 February 1986 07:55	Tanegashima	BS-2B (Yuri-2B)^[4]	GTO	Success
14(F)
16(F)	19 February 1987 01:23	Tanegashima	MOS-1 (Momo-1)^[5]	LEO	Success
16(F)

References

^ "JAXA | Engineering Test Satellite IV "KIKU-3" (ETS-IV)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
^ ^a ^b "JAXA | Geostationary Meteorological Satellite "Himawari" (GMS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
^ ^a ^b "JAXA | Communication Satellite "Sakura" (CS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
^ ^a ^b "JAXA | Broadcasting Satellite "Yuri" (BS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
^ "JAXA | Marine Observation Satellite-1 "Momo-1" (MOS-1)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

Wade, Mark. "Delta". Encyclopedia Astronautica. Archived from the original on 2013-08-17. Retrieved 2008-08-31.
McDowell, Jonathan. "Thor". Orbital and Suborbital Launch Database. Jonathan's Space Report. Archived from the original on 2020-08-01. Retrieved 2008-08-31.
Krebs, Gunter. "N-2". Gunter's Space Page. Retrieved 2008-08-31.

[1] "JAXA | Engineering Test Satellite IV "KIKU-3" (ETS-IV)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

[:0-2] "JAXA | Geostationary Meteorological Satellite "Himawari" (GMS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

[:1-3] "JAXA | Communication Satellite "Sakura" (CS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

[:2-4] "JAXA | Broadcasting Satellite "Yuri" (BS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

[5] "JAXA | Marine Observation Satellite-1 "Momo-1" (MOS-1)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

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Orbital launch systems
List of orbital launch systems Comparison of orbital launch systems
Current	Angara 1.2 A5 Ariane 6 Atlas V Ceres 1 1S Chollima-1 Electron Eris^† Falcon 9 Block 5 Falcon Heavy Firefly Alpha Gravity-1 GSLV H3 Hyperbola-1 Jielong 1 3 KAIROS^† Kaituozhe 2 Kinetica 1 Kuaizhou 1 1A 11 Long March 2C 2D 2F 3A 3B/E 3C 4B 4C 5 5B 6 6A 6C 7 7A 8 11 11H 12 LVM3 Minotaur I IV V C New Glenn Nuri OS-M1^† Pegasus XL Proton-M PSLV Qaem 100 Qased Shavit 2 Simorgh SLS Block 1 Soyuz-2 2.1a / STA 2.1b / STB Spectrum^† SSLV Starship Tianlong-2 Unha Vega C Vulcan Centaur Zhuque 2
In development	Antares 330 Bloostar Blue Whale 1 Cyclone-4M Deca Eclipse Epsilon S Gravity-2 HANBIT-NANO Hyperbola-2 Irtysh KSLV-III Kuaizhou 21 31 Long March 9 10 Miura 5 Neutron New Line 1 NGLV Nova OS-M 2 4 Orbex Prime Pallas-1 Red Dwarf RFA One SLS Block 1B Block 2 Soyuz-7 Terran R Tianlong-3 VLM Vega E Zero Zhuque 3 Zuljanah
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Classes	Sounding rocket Small-lift launch vehicle Medium-lift launch vehicle Heavy-lift launch vehicle Super heavy-lift launch vehicle
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Launch history

See also

References