ullage rocket造句

• In addition, the heat from the ullage rockets could potentially ignite the propellants in the stage.
• Meanwhile, the succeeding stage may have ullage rockets, both to aid separation and ensure good starting of liquid-fuel engines.
• Although inert, the retrograde rockets, ullage rockets, and shaped charges had the dimensions of the live ordnance to let the launch team practice ordnance installation.
• As everyone in the blockhouse watched in dismay, the ullage rockets on the outside of the Agena began firing and the internal fuel pumps began spinning up for engine start.
• The whole stage separation system worked perfectly with the retrorockets firing on the first stage to decelerate it and ullage rockets on the S-IV firing to settle its fuel to aft of the stage.
• "' Ullage motors "'( also known as "'ullage engines "'or "'ullage rockets "') are relatively small, independently fueled rocket engines that may be fired to accelerate the rocket prior to main engine ignition, when the vehicle is in a zero-g situation.