Difference between revisions of "LV-N "Nerv" Atomic Rocket Motor"

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(Implementation details to trivia)
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{{:LV-N Atomic Rocket Motor/Box}}
 
{{:LV-N Atomic Rocket Motor/Box}}
  
The '''LV-N Atomic Rocket Motor''' is a low-thrust, high-efficiency [[rocket engine]]. It is modeled after the real-world [[wikipedia:nuclear thermal rocket|nuclear thermal rocket]], which uses a fission reactor to heat liquid hydrogen and propel it out of the rocket nozzle; however, as of {{Check version|0.24}}, it is still a hybrid design which is powered by [[liquid fuel]] and [[oxidizer]]. This is largely due to programming constraints, as stated in its parts.cfg file, although the real-world equivalent could use other liquids for propulsion, but then with a lower efficiency.
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The '''LV-N Atomic Rocket Motor''' is a low-thrust, high-efficiency [[rocket engine]]. It is modeled after the real-world [[wikipedia:nuclear thermal rocket|nuclear thermal rocket]], which uses a fission reactor to heat its propellant and force it out of the rocket nozzle to generate thrust (as opposed to a normal rocket, which ignites the propellant and uses the energy released by the resulting chemical reaction for that purpose).
  
 
== Usage ==
 
== Usage ==
The LV-N has low thrust and a very high mass, giving it the worst [[thrust-to-weight ratio]] of all liquid engines. Its [[Isp]] while in atmosphere is also quite poor, making it not recommended for operation within atmospheres or for landings on larger bodies.
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The LV-N has low thrust and a very high mass, giving it the worst [[thrust-to-weight ratio]] of all liquid engines. Its [[Isp|I<sub>sp</sub>]] while in atmosphere is also quite poor, making it not recommended for operation within atmospheres or for landings on larger bodies.
  
 
However, when outside the atmosphere, its efficiency becomes superb with a vacuum [[Specific impulse|I<sub>sp</sub>]] of 800 s, by far the highest of any [[liquid engine|liquid fuel engine]]. This remarkable efficiency makes it quite popular for upper stages as it is ideal for interplanetary travel.
 
However, when outside the atmosphere, its efficiency becomes superb with a vacuum [[Specific impulse|I<sub>sp</sub>]] of 800 s, by far the highest of any [[liquid engine|liquid fuel engine]]. This remarkable efficiency makes it quite popular for upper stages as it is ideal for interplanetary travel.
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== Trivia ==
 
== Trivia ==
 
* The description of this part is a reference to the Douglas Adams humorous sci-fi novel "Mostly Harmless"
 
* The description of this part is a reference to the Douglas Adams humorous sci-fi novel "Mostly Harmless"
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* Unlike real-world nuclear thermal rockets, the LV-N consumes both [[liquid fuel]] and [[oxidizer]]. This due to programming constraints, as stated in its parts.cfg file, and [[Squad]]'s unwillingness to add another propellant type. Real NTRs run on liquid hydrogen, but are capable of using other propellants at lower efficiencies.
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== Changes ==
 
== Changes ==

Revision as of 17:41, 22 July 2014

LV-N "Nerv" Atomic Rocket Motor
Part image
Liquid fuel engine by
Jebediah Kerman's Junkyard and Spacecraft Parts Co

Radial size Small
Cost (total) 10 000.00 Funds
Mass (total) 3.00 t
Drag 0.2
Max. Temp. 2500 K
Volume  ?
Impact Tolerance 12 m/s
Research Tech tree nuclear propulsion.png Nuclear Propulsion
Unlock cost 45 000 Funds
Since version 0.17
Part configuration liquidEngineLV-N.cfg
Liquid fuel engine
Maximum thrust (1 atm) 13.88 kN
(vacuum) 60.00 kN
Isp (1 atm) 185 s
(vacuum) 800 s
Fuel consumption 1.53 Units of fuel/s


Thrust vectoring No
Testing Environments
On the surface Yes
In the ocean No
On the launchpad No
In the atmosphere Yes
Sub orbital Yes
In an orbit Yes
On an escape Yes
Docked No
Test by staging Yes
Manually testable Yes

The LV-N Atomic Rocket Motor is a low-thrust, high-efficiency rocket engine. It is modeled after the real-world nuclear thermal rocket, which uses a fission reactor to heat its propellant and force it out of the rocket nozzle to generate thrust (as opposed to a normal rocket, which ignites the propellant and uses the energy released by the resulting chemical reaction for that purpose).

Usage

The LV-N has low thrust and a very high mass, giving it the worst thrust-to-weight ratio of all liquid engines. Its Isp while in atmosphere is also quite poor, making it not recommended for operation within atmospheres or for landings on larger bodies.

However, when outside the atmosphere, its efficiency becomes superb with a vacuum Isp of 800 s, by far the highest of any liquid fuel engine. This remarkable efficiency makes it quite popular for upper stages as it is ideal for interplanetary travel.

It will overheat when run at full throttle, but it will usually stabilize before completely filling the overheat bar. As of version 0.23, it will quickly overheat and explode when placed directly under a Rockomax Jumbo-64 Fuel Tank.

Description

Despite the big scary trefoil painted onto the side of this engine, its radioactive exhaust, and tendency to overheat, the LV-N Atomic Rocket Motor is harmless. Mostly.

Jebediah Kerman's Junkyard and Spaceship Parts Co.

Yes, I know this is wrong. NTRs don't actually burn fuel and oxidizer, but we don't want to jump into making separate tanks for the two yet.

Excerpt from the part.cfg

Trivia

  • The description of this part is a reference to the Douglas Adams humorous sci-fi novel "Mostly Harmless"
  • Unlike real-world nuclear thermal rockets, the LV-N consumes both liquid fuel and oxidizer. This due to programming constraints, as stated in its parts.cfg file, and Squad's unwillingness to add another propellant type. Real NTRs run on liquid hydrogen, but are capable of using other propellants at lower efficiencies.


Changes

0.24
  • Cost increased from 1700 to 8700 (and made meaningful)
0.22
  • Alternator added, engine now gains 5.0 electricity.
0.17
  • Initial release