Difference between revisions of "Mk-55 "Thud" Liquid Fuel Engine"

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{{Partbox
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{{:Rockomax Mark 55 Radial Mount Liquid Engine/Box}}
|Name=Mark 55 Radial mount engine
 
|Role=Liquid Fuel Engine
 
|Class=LiquidEngine
 
|File=Mark 55 Radial mount engine.png
 
|Costs=850
 
|Mass=1.5
 
|More=
 
{{PB-more|Minimum Thrust|0 N}}
 
{{PB-more|Maximum Thrust|80 N}}
 
{{PB-more|Fuel Consumption|2}}
 
{{PB-more|Gimbal Range|1.0}}
 
|since=v0.16
 
|cfg=Parts/liquidEngine3/part.cfg
 
}}
 
  
The '''Mark 55 Radial mount engine''' is used to provide thrust to a rocket and is fueled by [[FL-T250 Fuel Tank]]s.
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The '''Mk-55 "Thud" Liquid Fuel Engine''' is a radially mounted [[Reaction engine#Liquid fuel rocket engines|liquid fuel rocket engine]].
 +
 
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== Product description ==
 +
{{Quote
 +
|After an intensive search for an engineer crazy enough to plan and build a revolutionary new engine type, researchers turned to  renowned engineer Eumon Kerman, one of the top minds in the industry. He failed miserably at the job, and this is what we ended up with. Hey, at least it works well with other large (Rockomax) engines when you want more control. Sorry, no combo deals.
 +
|manufacturer=RMC}}
  
 
== Usage ==
 
== Usage ==
The Mark 55 is the third [[Liquid Fuel]] engine with thrust vector control, that allows efficient control of the rocket when it is most needed - during ascent and orbit correction burns. Despite having the same fuel specific impulse as [[LV-T30 Liquid Fuel Engine|LV-T30]] and [[LV-T45 Liquid Fuel Engine|LV T-45 Liquid Fuel Engines]], the much smaller and lighter mk55 has less thrust (and longer burn time at the same fuel amount). The low thrust makes a single mk55 unsuitable as a main engine on most lower stages, but the low mass allows for more efficient upper stages.  More importantly, the ,mk55 is radialy mounted meaning you can position landing struts between them.  can extend past it.  Because of this, the mk55 is one of the primary choices  for lander engines in 0.16.x.
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The Thud is a [[liquid fuel engine]] with [[Gimbal|thrust vector control]] that allows efficient control of the rocket during descent and landing. The Thud is fairly low-thrust. This is offset by its comparatively low weight, however. The engine has a [[thrust-to-weight ratio]] comparable to the [[LV-T45 "Swivel" Liquid Fuel Engine]].  
  
Unike LV-T30 and -45, the mk55 are  placeable on [[Radial Decouplers]]. The mk55 must be directly connected to a non-empty  Fuel Tank, or fed by a [[FTX-2 External Fuel Duct|fuel line]] to produce any thrust.
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The low thrust and radial mounting makes a single Thud unsuitable as a main engine on most lower stages, but it can be used to augment other engines. A common use of this engine is in lander designs, as it eliminates the need to have a vulnerable engine in an easily-damaged position.  The [[Specific impulse|I<sub>sp</sub>]] of this engine is adequate, being 275&nbsp;s at 1&nbsp;[[w:Atmosphere_(unit)|atm]] and 305&nbsp;s in vacuum, not far behind the [[LV-T30 "Reliant" Liquid Fuel Engine]] and LV-T45; however, it is still greatly inferior to dedicated vacuum engines, such as the [[LV-909 "Terrier" Liquid Fuel Engine]] and the [[RE-L10 "Poodle" Liquid Fuel Engine]].
  
The thrust vectoring on this engine tends to be more useful than on the LV-T45, due to both the radial mounting, and use as a stabilizer.
+
Additionally, landing legs can be mounted directly on these engines. This is an advantage shared with other radial engines: the [[LV-1R "Spider" Liquid Fuel Engine]], the [[24-77 "Twitch" Liquid Fuel Engine]] and the [[O-10 "Puff" MonoPropellant Fuel Engine]].
  
== Description ==
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Like the Twitch, this engine has a respectable [[gimbal]] range of 8 degrees.
{{TBA}}
 
The Mark 55 is the third Liquid Fuel engine with thrust vector control, that allows efficient control of the rocket when it is most needed - during ascent and orbit correction burns. Despite having the same fuel specific impulse as LV-T30 and LV T-45 Liquid Fuel Engines, the much smaller and lighter mk55 has dramatically less thrust (and longer burn time at the same fuel amount). The low thrust makes the mk55 unsuitable as a main engine on most lower stages, but the low mass allows for more efficient upper stages. More importantly, mk55 is short enough that LT-2 Landing Struts can extend past it. Because of this, the mk55 is the primary choice for lander engines in 0.14.x. as they can be placed in-between
 
  
Like LV-T30 and -45, the mk55 are not place-able on Radial De-couplers. Unlike the the LV series the mk55 can be mounted radially allowing for multiple placement around a single fuel tank. The mk55 must be directly connected  to a non-empty  Fuel Tank, or fed by a fuel line to produce any thrust.
+
Contrary to the product description, it can indeed use fuel from rocket fuel tanks that use non-Rockomax engines as well as ones from that company.
  
The thrust vectoring on this engine tends to be more useful than on the LV-T45, due to both the radial mounting, and use as a stabilizer.
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==Trivia==
 +
* The Thud bears a slight resemblance to the Space Shuttle's Orbital Maneuvering System (OMS) thrusters. However, besides obvious coloration differences, the Thud uses liquid fuel and oxidizer, unlike the real life OMS thrusters which burned hypergolic bipropellant fuel.
  
 
== Changes ==
 
== Changes ==
''see also: [[Version History]]''
 
; v0.16
 
* Part introduced
 
  
 +
[[File:Mark 55 Radial mount engine.png|100px|thumb|left|Appearance before [[1.0.5]] ]]
 +
{{clear|left}}
 +
 +
;[[1.0.5]]
 +
* Remodeled and retextured
 +
;[[1.0.3]]
 +
* Description changed
 +
;[[0.90]]
 +
* Cost reduced from 850 to 800, Isp increased from 290 vacuum / 320 atmosphere to 360 vacuum / 320 atmosphere, gimbal range increased from 3° to 5°.
 +
;[[0.18]]
 +
* Description changed
 +
;[[0.18]]
 +
* Mass reduced from from 1.5 to 0.9, gimbal range increased to 3°, Isp curve changed from 330 vacuum/280 atmosphere to 320 vacuum/290 atmosphere, heat production increased from 300 to 350.
 +
;[[0.17]]
 +
* Renamed 'Mark 55 Radial mount engine' to 'Rockomax Mark 55 Radial Mount Liquid Engine' (Currently Mk-55 "Thud" Liquid Fuel Engine)
 +
* Thrust increased from 80&nbsp;kN to 120&nbsp;kN.
 +
* Manufacturer changed from Jebediah Kerman's Junkyard and Spaceship Parts Co. to Rockomax Conglomerate.
 +
;[[0.16]]
 +
* Initial Release
  
 
{{Parts}}
 
{{Parts}}
 +
[[Category:Liquid fuel engines]]

Latest revision as of 17:41, 20 July 2021

Mk-55 "Thud" Liquid Fuel Engine
Part image
Liquid fuel engine by
Rockomax Conglomerate

Radial size Radial mounted
Cost (total) 820.00 Funds
Mass (total) 0.90 t
Drag 0.2
Max. Temp. 2000 K
Volume  ?
Impact Tolerance 7 m/s
Research Advanced rocketry.png Advanced Rocketry
Unlock cost 3 500 Funds
Since version 0.16
Part configuration liquidEngineMk55.cfg
Liquid fuel engine
Maximum thrust (1 atm) 108.20 kN
(vacuum) 120.00 kN
Isp (1 atm) 275 s
(vacuum) 305 s
Fuel consumption 8.02 Units of fuel/s


Thrust vectoring 8 °
Testing Environments
On the surface Yes
In the ocean Yes
On the launchpad Yes
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 Mk-55 "Thud" Liquid Fuel Engine is a radially mounted liquid fuel rocket engine.

Product description

After an intensive search for an engineer crazy enough to plan and build a revolutionary new engine type, researchers turned to renowned engineer Eumon Kerman, one of the top minds in the industry. He failed miserably at the job, and this is what we ended up with. Hey, at least it works well with other large (Rockomax) engines when you want more control. Sorry, no combo deals.

Rockomax Conglomerate

Usage

The Thud is a liquid fuel engine with thrust vector control that allows efficient control of the rocket during descent and landing. The Thud is fairly low-thrust. This is offset by its comparatively low weight, however. The engine has a thrust-to-weight ratio comparable to the LV-T45 "Swivel" Liquid Fuel Engine.

The low thrust and radial mounting makes a single Thud unsuitable as a main engine on most lower stages, but it can be used to augment other engines. A common use of this engine is in lander designs, as it eliminates the need to have a vulnerable engine in an easily-damaged position. The Isp of this engine is adequate, being 275 s at 1 atm and 305 s in vacuum, not far behind the LV-T30 "Reliant" Liquid Fuel Engine and LV-T45; however, it is still greatly inferior to dedicated vacuum engines, such as the LV-909 "Terrier" Liquid Fuel Engine and the RE-L10 "Poodle" Liquid Fuel Engine.

Additionally, landing legs can be mounted directly on these engines. This is an advantage shared with other radial engines: the LV-1R "Spider" Liquid Fuel Engine, the 24-77 "Twitch" Liquid Fuel Engine and the O-10 "Puff" MonoPropellant Fuel Engine.

Like the Twitch, this engine has a respectable gimbal range of 8 degrees.

Contrary to the product description, it can indeed use fuel from rocket fuel tanks that use non-Rockomax engines as well as ones from that company.

Trivia

  • The Thud bears a slight resemblance to the Space Shuttle's Orbital Maneuvering System (OMS) thrusters. However, besides obvious coloration differences, the Thud uses liquid fuel and oxidizer, unlike the real life OMS thrusters which burned hypergolic bipropellant fuel.

Changes

Appearance before 1.0.5
1.0.5
  • Remodeled and retextured
1.0.3
  • Description changed
0.90
  • Cost reduced from 850 to 800, Isp increased from 290 vacuum / 320 atmosphere to 360 vacuum / 320 atmosphere, gimbal range increased from 3° to 5°.
0.18
  • Description changed
0.18
  • Mass reduced from from 1.5 to 0.9, gimbal range increased to 3°, Isp curve changed from 330 vacuum/280 atmosphere to 320 vacuum/290 atmosphere, heat production increased from 300 to 350.
0.17
  • Renamed 'Mark 55 Radial mount engine' to 'Rockomax Mark 55 Radial Mount Liquid Engine' (Currently Mk-55 "Thud" Liquid Fuel Engine)
  • Thrust increased from 80 kN to 120 kN.
  • Manufacturer changed from Jebediah Kerman's Junkyard and Spaceship Parts Co. to Rockomax Conglomerate.
0.16
  • Initial Release