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 m (114 ft 10 in)
Diameter	2.44 m (8 ft 0 in)
Mass	132,690 kg (292,530 lb)
Stages	2 or 3
Capacity
Payload to LEO
Mass	2,000 kg (4,400 lb)
Payload to GTO
Mass	730 kg (1,610 lb)
Associated rockets
Family	Delta
Based on	N-I
Derivative work	H-I
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
Maximum thrust	258.9 kN (58,200 lbf)
Specific impulse	262 s (2.57 km/s)
Burn time	37 seconds
Propellant	Solid
First stage – Thor-ELT
Powered by	1 × MB-3-3
Maximum thrust	866.7 kN (194,800 lbf)
Specific impulse	290 s (2.8 km/s)
Burn time	270 seconds
Propellant	RP-1 / LOX
Second stage – Delta-F
Powered by	1 × AJ-10-118F
Maximum thrust	41.3 kN (9,300 lbf)
Specific impulse	280 s (2.7 km/s)
Burn time	335 seconds
Propellant	HNO3 / UDMH
Third stage (optional) – Star-37E
Maximum thrust	68 kN (15,000 lbf)
Specific impulse	284 s (2.79 km/s)
Burn time	42 seconds
Propellant	Solid
Third stage (optional) – Burner II
Maximum thrust	43.6 kN (9,800 lbf)
Specific impulse	285 s (2.79 km/s)
Burn time	42 seconds
Propellant	Solid
	[edit on Wikidata]

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	Date (UTC)	Launch site	Payload	Orbit	Outcome
F7^[a]	11 February 1981 08:30	Tanegashima, Osaki	ETS-IV	GTO	Success
F7^[a]	First flight of the N-II launch vehicle. Payload was ETS-IV (Engineering Test Satellite IV, nicknamed Kiku-3)^[1]
F8	10 August 1981 20:03	Tanegashima, Osaki	GMS-2 (Himawari-2)^[2]	GTO	Success
F8
F10	4 February 1983 08:37	Tanegashima, Osaki	CS-2A (Sakura-2A)^[3]	GTO	Success
F10
F11	5 August 1983 20:29	Tanegashima, Osaki	CS-2B (Sakura-2B)^[3]	GTO	Success
F11
F12	23 January 1984 07:58	Tanegashima, Osaki	BS-2A (Yuri-2A)^[4]	GTO	Success
F12
F13	2 August 1984 20:30	Tanegashima, Osaki	GMS-3 (Himawari-3)^[2]	GTO	Success
F13
F14	12 February 1986 07:55	Tanegashima, Osaki	BS-2B (Yuri-2B)^[4]	GTO	Success
F14
F16	19 February 1987 01:23	Tanegashima, Osaki	MOS-1 (Momo-1)^[5]	LEO	Success
F16

↑ The flight numbering is a continuation of the series used on the N-I

References

↑ "JAXA | Engineering Test Satellite IV "KIKU-3" (ETS-IV)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
1 2 "JAXA | Geostationary Meteorological Satellite "Himawari" (GMS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
1 2 "JAXA | Communication Satellite "Sakura" (CS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.
1 2 "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.

This rocketry article is a stub. You can help Wikipedia by adding missing information.

[1] The flight numbering is a continuation of the series used on the N-I

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

[:0-3] 1 2 "JAXA | Geostationary Meteorological Satellite "Himawari" (GMS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

[:1-4] 1 2 "JAXA | Communication Satellite "Sakura" (CS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

[:2-5] 1 2 "JAXA | Broadcasting Satellite "Yuri" (BS)". JAXA | Japan Aerospace Exploration Agency. Retrieved 2020-03-16.

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

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N-II (rocket)

Launch history

See also

References