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1
Rocket Propulsion Elements
As explained in Section 3.5, there are at least four values of specific impulse: (1)
theoretical specific impulse, (2) delivered or actual values as measured from
flight tests, static tests, or demonstrations (see Ref. 12.12), (3) delivered specific ...
George P. Sutton, Oscar Biblarz,
2011
2
Rocket and Spacecraft Propulsion: Principles, Practice and ...
... imparted to the rocket per kilogramme of propellant expelled. If the exhaust
velocity is high then the propellant eciency is high, which is clear from the
equation for ] Sec. 2.5 2.5 Computing rocket engine performance 59 2.5.1
Specific impulse.
Martin J. L. Turner,
2008
Charles Justiz. SPECIFIC IMPULSE CHARLES JUSTIZ iUniverse, Inc.
Bloomington Specific Impulse Copyright © 2010, 2011, 2012 Charles Justiz All.
4
Orbital Mechanics: Theory and Applications
SPECIFIC IMPULSE The specific impulse of a rocket-propcllant combination is
analogous to "miles per gallon" for an automobile. All other things being equal,
the A r we can obtain from a rocket stage is directly proportional to its specific ...
5
Aerospace Propulsion Systems
Simply stated, a rocket is more fuel-efficient if the specific impulse is higher. (This
should not in any way be confused with energy-efficiency, which can decrease as
specific impulse increases. Many propulsion systems that give high specific ...
14 AIR UNIVERSITY REVIEW impulse capabilitv of a svstem, w e know how
efficiently the system is using its propellant Specific impulse has the units of
seconds in the MKS svstem The practical implication of specific impulse can
lminedidtelv ...
7
Solar Sailing: Technology, Dynamics and Mission Applications
Infinite specific impulse is only achieved in practice for an infinite mission
duration. In order to measure the effective specific impulse delivered by a solar
sail the initial mass m\ will be considered to be the mass of the solar sail and the
payload, ...
8
Encyclopedia of Space and Astronomy
However, the RP-1/LOX propellant combination delivers considerably less
specific impulse (Isp) than that delivered by cryogenic propellant combinations.
The specific impulse is an important parameter in describing the performance of
a ...
Attitude control, precision spacecraft control, and low- thrust maneuvers can be
effectively provided by ion and plasma thrusters, which are high- specific-impulse
, low-power electric propulsion systems (Grishin, Leskov, & Kozlov, 1975; ...
10
The Chemistry of Fireworks
Lighter gases are preferred because they can be accelerated to higher velocities
through the nozzle and this factor contributes to a higher value of specific impulse
. On the other hand, solid propellants based on gunpowder produce carbon ...
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Space shuttle powered by MICROWAVES could be the future of …
EDI's external propulsion launch system will operate at a specific impulse above 750 s and this breakthrough increase in efficiency reduces the fraction of mass ... «Daily Mail, 七月 15»
This Company Aims To Launch Rockets With Beams Of Power
The efficiency of rockets are generally measured by their specific impulse, ... Traditional chemical rockets have a specific impulse of 460s, which is why they rely ... «Forbes, 七月 15»
Chinese Long March 4B conducts surprise Gaofen-8 launch
The vehicle is equipped with a YF-21B engine capable of a ground thrust of 2,971 kN and a ground specific impulse of 2,550 Ns/kg. The second stage has a ... «NASASpaceflight.com, 六月 15»
"World's first battery-powered rocket" readied for launch
... and lithium polymer batteries, and provides enough fuel for the Rutherford to generate 4,600 lbf (20,462 N) of thrust and a specific impulse of 327 seconds. «Gizmag, 四月 15»
VASIMR Rocket Could Send Humans To Mars In Just 39 Days
NASA has selected Texas-based Ad Astra Rocket Company for a round of funding to help develop the Variable Specific Impulse Magnetoplasma Rocket, ... «Huffington Post, 四月 15»
Long March 3C in secretive launch with new Upper Stage
On the first stage, the CZ-3C uses a DaFY6-2 engine with a 2961.6 kN thrust and a specific impulse of 2556.2 Ns/kg. The first stage diameter is 3.35 m and the ... «NASASpaceflight.com, 三月 15»
Arianespace Soyuz ST-B conducts launch of Galileo duo
With the Soyuz ST-B utilizing the RD-0124 third stage engine, an additional 34 seconds of specific impulse (Isp) significantly increases the vehicle's overall ... «NASASpaceflight.com, 三月 15»
Angara rocket key to Russia's launch future
Engines based on hydrogen have a higher specific impulse than the commonly used RP-1 (kerosene), meaning they produce more thrust for the same weight of ... «EarthSky, 三月 15»
Elon Musk Will Unveil SpaceX's Mars Colonizing Spaceship This Year
One of the new features of MCT's engines, Musk explains, are that they have a higher specific impulse, which basically means the rocket can power itself with ... «Business Insider, 一月 15»
Wax Fuel Gives Hybrid Rockets More Oomph
Rocket designers do that with a quantity called specific impulse, which is directly proportional to the speed of the gas exiting the rocket nozzle. (The higher the ... «IEEE Spectrum, 十一月 14»