I am a comfortably retired rocket engine machinist that worked a long carear in AeroJet Rocketdyne's Advanced Special Projects Division. My carrear of almost 25 years at this high tech facility of cutting edge technologies encompassed research and development in performance gains & durability of solid rocket, electricly augmented bi propellant Hydrazine fueled thrusters for satellites and deep space probes. In the late 80's a renewed interest in electric propulsion devices the Russians had made some gains in the 70's with, triggered research and development thru the 90's into ion and hall effect propulsion engines that use light weight Xenon gas for the fuel. These dependable, rugged, light weight electric propulsion class rocket engines can "stay on" producing thrust for months at a time. By 1998 the first ion engine was successfully used as the main propulsion system on Deep Space 1, a spacecraft who's mission was to fly to asteroid 9969 Braille then to Comet Borrelly.
注意:您即将离开Pornhub
你想要访问的页面:
不归属于Pornhub。
基于对您的Pornhub账号的安全和隐私考虑,当您访问 pornhub.com 和pornhubpremium.com之外的网站时绝对不要输入您的密码。
警告:此链接可能不安全
你尝试访问的页面:
这不是官方Pornhub地址且可能存在危险。为了您的安全和隐私,这个链接已失效。