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  2. Liquid-propellant rocket - Wikipedia

    en.wikipedia.org/wiki/Liquid-propellant_rocket

    One of the most efficient mixtures, oxygen and hydrogen, suffers from the extremely low temperatures required for storing liquid hydrogen (around 20 K or −253.2 °C or −423.7 °F) and very low fuel density (70 kg/m 3 or 4.4 lb/cu ft, compared to RP-1 at 820 kg/m 3 or 51 lb/cu ft), necessitating large tanks that must also be lightweight and ...

  3. Pressure-fed engine - Wikipedia

    en.wikipedia.org/wiki/Pressure-fed_engine

    Pressure-fed rocket cycle. Propellant tanks are pressurized to directly supply fuel and oxidizer to the engine, eliminating the need for turbopumps. The pressure-fed engine is a class of rocket engine designs. A separate gas supply, usually helium, pressurizes the propellant tanks to force fuel and oxidizer to the combustion chamber. To ...

  4. Liquid rocket propellant - Wikipedia

    en.wikipedia.org/wiki/Liquid_rocket_propellant

    (Pressure stabilized tanks support most of the loads with internal pressure rather than with solid structures, employing primarily the tensile strength of the tank material. [ citation needed ] ) The Soviet rocket programme, in part due to a lack of technical capability, did not use liquid hydrogen as a propellant until the Energia core stage ...

  5. Space Shuttle external tank - Wikipedia

    en.wikipedia.org/wiki/Space_Shuttle_external_tank

    The Space Shuttle external tank (ET) was the component of the Space Shuttle launch vehicle that contained the liquid hydrogen fuel and liquid oxygen oxidizer. During lift-off and ascent it supplied the fuel and oxidizer under pressure to the three RS-25 main engines in the orbiter .

  6. Air-independent propulsion - Wikipedia

    en.wikipedia.org/wiki/Air-independent_propulsion

    Siemens has developed a 30–50 kilowatt fuel cell unit, a device that converts the chemical energy from a fuel and oxidiser into electricity. Fuel cells differ from batteries in that they require a continuous source of fuel (such as hydrogen) and oxygen, which are carried in the vessel in pressurized tanks, to sustain the chemical reaction.

  7. ThisWorx car vacuum review: Fast, hassle-free dust-busting ...

    www.aol.com/lifestyle/thisworx-car-vacuum-review...

    Yeah, this is pretty much a Dustbuster for the car, one with a 16-foot power cord that plugs into any standard 12-volt outlet (previously known as a cigarette lighter, now referred to as a power ...

  8. 9 top-rated handheld vacuums to shop - AOL

    www.aol.com/9-top-rated-handheld-vacuums...

    Black+Decker Dustbuster Handheld Vacuum $ at Walmart This 2.11-pound handheld vacuum cleaner has a dustbin capacity of 0.25 gallons, a 10.8-volt lithium ion battery and a wall mount for charging.

  9. ‘Perfect for spiffing up any area’: This Black & Decker ...

    www.aol.com/lifestyle/hurry-super-popular-black...

    The Dustbuster has been around so long and is so popular, it's practically synonymous with the term handheld vacuum. This model continues that storied history of power, convenience and durability.