RK-7 "Kodiak" Liquid Fueled Engine

RK-7 "Kodiak" Liquid Fueled Engine
Liquid fuel engine by Reaction Systems Ltd
Radial size		Medium, Radial mounted
Cost	(total)	1 100.00
Mass	(total)	1.250 t
Drag		0.3-0.2
Max. Temp.		2000 K
Impact Tolerance		9 m/s
Research		Heavier Rocketry
Unlock cost		4 400
Since version		1.4.1
Part configuration		LiquidEngineRK-7.cfg
Maximum thrust	(1 atm)	247.00 kN
	(vacuum)	260.00 kN
Isp	(1 atm)	285 s
	(vacuum)	300 s
Fuel consumption		17.68 /s
Thrust vectoring		No
Electricity generated		5.0 ⚡/s
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		None

The RK-7 "Kodiak" is a liquid fueled engine similar in performance to the LV-T30 "Reliant" Liquid Fuel Engine, but with a "Russian" theme. It allows for greater visual and thematic variety in Making History scenarios, and usually is used in conjunction with the RV-1 vernier.

Usage

Prior to 1.6, the RK-7's thrust, mass, Isp, and lack of vectoring make it almost identical (if more expensive) than the LV-T30, meaning it can in principle be used in the same situations. The high cost and position on the tech tree, however, make it an inferior choice in most situations.

After changes in 1.6, RK-7 have an increase in thrust, giving it a better ASL TWR and ISP, while the cost is lowered to make it identical to LV-T30. While it still high on the tech tree, due to its lower cost compare to vector and possibly better TWR than Skiff (craft dependent), once aesthetic is ignored it becomes a good engine for use in carrier mode.

Product description

“

A bear of an engine. This quad-nozzled beast comes with multiple cowling options, and no gimbal. Don’t forget those verniers. — Reaction Systems Ltd

”

Variants

As of version 1.4.1 this engine has three models that can be switched in the editor: bare, 1.5 m, and and 1.875 m.

The different variants of the engine

Trivia

While bears are often used as a symbol of Russia, [kodiaks] live exclusively in the United States.

Real-world comparison

The RK-7 was inspired by the Russian RD-107 engine.

Changes

1.6

• Increased unlock cost from 4200 to 4400
• Decreased cost from 1300 to 1100
• Increased crash tolerance from 6 to 9
• Increased EC generation from 3 to 5
• Increased ASL thrust to 247
• Increased vacuum thrust from 240 to 260
• Improved Isp

1.4.5

• Added ModuleTestSubject

1.4.1

• Initial Release