| 词条 | Skokie (rocket) |
| 释义 |
|image = Skokie 2 in gantry.jpg |imsize = 300 |caption = Skokie 2 |function = Experimental rocket |manufacturer = Cook Electric Co. |country-origin = United States |height = Skokie 1: {{convert|25|ft|disp=flip}} Skokie 2: {{convert|32|ft|disp=flip}} |diameter = Skokie 1: {{convert|20|in|disp=flip}} |mass = Skokie 1: {{convert|2400|lb|disp=flip}} Skokie 2: {{convert|3000|lb|disp=flip}} |stages = One |status = Retired |sites = |launches = |partial = |first = |last = |stagedata = |type = Booster |stageno = First |name = JATO |diameter = |engines = 3 |thrust = {{convert|49|kN|abbr=on}} each |burntime = |fuel = Solid }} Skokie was a family of research vehicles developed by the Cook Electric Co. for the United States Air Force during the mid to late 1950s. Launched from a B-29 bomber, Skokie 1 was an unpowered, ballistic vehicle, while Skokie 2 was rocket-propelled; both were used for evaluating and testing high-speed parachute recovery systems. Design and developmentIntended for use in evaluating high-speed parachute systems for the recovery of missiles and unmanned aircraft,[1] Skokie was a simple, inexpensively-designed vehicle, consisting of a tube with a long spike on the nose to reduce damage while landing under parachute.[2] Named after the hometown of the Cook Electric Co., their manufacturer,[3] Skokie 1 had four aft-mounted stabilizing fins;[4] Skokie 2 had a tri-fin arrangement,[5] with three solid-propellant rockets, of a type similar to that used for rocket-assisted take offs, externally mounted between them.[2] The vehicle was equipped with instrumentation to record the deployment of the two-stage parachute; a high-speed camera was also fitted.[5] Skokie I descended ballistically at high subsonic speed; the rocket-powered Skokie II could reach Mach 2 before deploying its parachute.[2] Mission profileSkokie was launched from a Boeing B-29 Superfortress bomber at {{convert|30000|ft|km}} in altitude.[2] On each drop, the vehicle would deploy an initial parachute to calibrate the onboard equipment, following which it would be released to allow the vehicle to build up speed.[6] A drogue parachute would be deployed once the vehicle reached a speed slightly below terminal velocity;[7] after deceleration, the main parachute of {{convert|88|ft}} in diameter would deploy.[6] ReferencesCitations1. ^Jacobs and Whitney 1962, p.170. 2. ^1 2 3 Haley 1959, p.153. 3. ^Aero Digest Volume 68 (1954), p.46. 4. ^Bowman 1957, p.193. 5. ^1 Parsch 2003 6. ^1 Ordway and Wakeford 1960, p.192. 7. ^Downing 1956, p.10. Bibliography{{refbegin}}
External links
3 : Experimental rockets of the United States|Equipment of the United States Air Force|Boeing B-29 Superfortress |
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