48-7S "Spark" Liquid Fuel Engine

48-7S "Spark" Liquid Fuel Engine
Liquid fuel engine by Rockomax Conglomerate
Radial size		Tiny
Cost	(total)	240.00
Mass	(total)	0.130 t
Drag		0.2
Max. Temp.		2000 K
Impact Tolerance		7 m/s
Research		Propulsion Systems
Unlock cost		2 800
Since version		0.21
Part configuration		liquidEngine48-7S_v2.cfg
Maximum thrust	(1 atm)	16.56 kN
	(vacuum)	20.00 kN
Isp	(1 atm)	265 s
	(vacuum)	320 s
Fuel consumption		1.27 /s
Thrust vectoring		3 °
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
Packed volume		140 l

The 48-7S "Spark" Liquid Fuel Engine is a liquid fuel engine for small craft.

Product description

“

The 48-7S may be small, but it packs quite a punch for its size. This little engine is a testament to how larger does not always means more advanced, at least according to Rockomax's marketing department. The box it comes in is pretty cool, in any case. — Rockomax Conglomerate

”

Usage

The Spark is a size 0 engine, typically placed on the bottom of a stage. Its specific impulse and thrust-to-weight ratio are similar to the LV-T45 "Swivel" Liquid Fuel Engine, and it can be used to serve a similar function. However, its unique size and mass make it a good upper stage engine; it has a reasonable specific impulse, and a low mass. By using a Spark instead of a heavier LV-909 "Terrier" Liquid Fuel Engine, a vessel's reduced dry mass may allow for greater delta-V.

The 24-77 "Twitch" Liquid Fuel Engine is the radial variant of the Spark. The Spark has greater thrust and efficiency, but is heavier and cannot be radially mounted.

Variants

As of version 1.6 this engine has three models that can be switched in the editor.

The different variants of the engine

Trivia

• The 48-7S "Spark" Liquid Fuel Engine was originally from the KSPX parts mod.
• Prior to version 1.7, due to its relatively high Isp and thrust to weight ratio, the 48-7S was remarkably capable in ascent, transfer, and lander roles and had a thrust to weight ratio second only to the Kerbodyne KR-2L Advanced Engine and the S3 KS-25x4 Engine Cluster.

Changes

1.7.1

• Atmospheric Isp increased from 260 to 265

1.7

• Mass increased from 0.1 to 0.13
• Atmospheric Isp decreased from 270 to 260

1.6

• New model and texture
• Added 3 variants

1.2

• Thrust increased to 20 kN and 320 specific impulse in vacuum.
• Cost increased from 200 to 240.

1.0

• Thrust decreased to 18kN.

0.22

• Thrust increased from 20 to 30 kN, description changed.

0.21

• Initial release