非火箭航天发射

非火箭航天发射是一种部分或全部的采用火箭发动机外的其他推进方式的航天发射方式。如在火箭橇发射或空中发射中，在通过其他手段获得初始速度或高度后，火箭才被应用。

比较

非火箭航天发射方法对比
新系统的初始设定

方法(a)	发表 时间	估计 造价 10亿美元(b)	负载 大小 千克	估计 近地轨道发射花费 美元/每公斤(b)	吞吐量 吨/每年	技术就绪指数
一般火箭[1]			118,000	3273	200~	9
太空电梯[来源请求]	2004	6.2-40	18,000+	220-400	2,000	2-4
极音速天钩[2]	1993	<1(c)	1,500(d)		30(e)	2
太空缆索[3]	1977					2
HASTOL[4],[5]	2000		15,000(f)			2
太空喷泉[来源请求]						2+
轨道环[6]	1980	15		<0.05		2
发射环[7] (小)	1985	10	5,000	300	40,000	2+
发射环[7] (大)	1985	30	5,000	3	6,000,000	2+
KITE Launcher[8]	2005					2
星际列车[9]		20(g)	35,000	43	150,000	2−4
质量投射器[来源请求]						4
Ram accelerator[来源请求]	2004			<500		6[10]
太空枪[11]	1865(h)	0.5	450	500		6
Slingatron[12]			100			2
太空飞机[来源请求]	1992	10-15	12,000	3,000		7
激光推进系统（英语：Laser propulsion）[来源请求]						up to 4

(a) References in this column apply to entire row unless specifically replaced
(b) All monetary values in un-inflated dollars based on reference publication date except as noted
(c) CY2008 estimate from description in 1993 reference system
(d) Requires first stage to ~5 km/s
(e) Subject to very rapid increase via bootstrapping
(f) Requires Boeing proposed DF-9 vehicle first stage to ~4 km/s
(g) Based on Gen-1 reference design, 2010 version
(h) Jules Verne's novel, From the Earth to the Moon. Newton's cannonball in the 1728 book A Treatise of the System of the World was considered a thought experiment.^[13]

参考文献

1. ^ 引用错误：没有为名为Spacecast2020的参考文献提供内容
2. "The Hypersonic Skyhook," Analog Science Fiction/Science Fact, Vol. 113, No. 11, September 1993, pp. 60-70.
3. "A Non-Synchronous Orbital Skyhook," Hans P. Moravec, Journal of the Astronautical Sciences, Vol. 25, Oct-Dec 1977
4. Paper, AIAA 00-3615 "Design and Simulation of Tether Facilities for HASTOL Architecture" R. Hoyt, 17-19 Jul 00.
5. Paper, NIAC 3rd Ann. Mtg, NIAC Subcontract No. 07600-040, “Hypersonic Airplane Space Tether Orbital Launch – HASTOL”, John E. Grant, 6 Jun 01.
6. "Orbital Ring Systems and Jacob's Ladders - I-III" （页面存档备份，存于互联网档案馆） Note: in 1980s money
7. Launch Loop slides for the ISDC2002 conference 互联网档案馆的存档，存档日期2008-05-29.
8. Johansen, US Patent #6913224, Method and system for accelerating an object, 5 Jul 05
9. "The Startram Project". [2011-06-22]. （原始内容存档于2017-07-27）.
10. 存档副本. [2011-06-22]. （原始内容存档于2009-04-06）.
11. "Quicklaunch Inc." 互联网档案馆的存档，存档日期2010-02-12.
12. "Slingatron, A Mechanical Hypervelocity Mass Accelerator". [2011-06-22]. （原始内容存档于2017-09-26）.
13. vectorsite.net > [4.0 Space Guns] （页面存档备份，存于互联网档案馆） v1.1.4 / chapter 4 of 7 / 01 jun 08 / greg goebel / public domain