New version V1.2 work with KSP 1.4.0 - 1.6.1

More photos here

This mod add set of engines with thrust from 120 to 360 kN. They have very small drag and suitable for spaceplanes and aircrafts.

Note! REALLY small drag, dropped rocket stages almost not decelerating inside atmosphere so add deployable airbrakes if you want return stages safely.

This engines can be attached to top and bottom nodes simultaneously.So they can be used as a sky crane systems or with rear attached droppable fuel tanks.

Unfortunatedly this engines don't have steering ability so I add some RCS modules and small control wing to help launch you rockets.

Also this mod include lot of MK-1 fueltanks separated to Liquid fuel and Oxidizer with capacitymods and (possibly) can work with all game updates. So you can add EXACT amount of fuel and/or oxidizer to your SSTO, rocket or aircraft.

If you don't like too many unnecessary parts in library, you can freely delete it inside GameData\StreamlineEnginesTanks\Parts

• Mk1EngStreamline - Engines
• Mk1EngStrRCS - RCS
• Ox-LF Tanks - fueltanks

-------------------------- added in 1.2 --------------------------