IST’s Rocket Engines

IST uses liquid fuel for it’s full range of rockets.
Liquid fuel offers superior performance, better safety and lower costs
than solid propellants.
All of IST’ss engines are designed, tested and built in house.


Engine Lineup

Our current line up consists of two engines
・12kN class engine for MOMO sounding rocket
–LOx-Ethanol fuel, pressure feed cycle
–ablatively cooled chamber, radiatively cooled nozzle

・60kN class engine for ZERO orbital rocket (under development)
–LOx-Kerosene fuel,gas generator cycle
–regeneratively cooled chamber and nozzle


Pintle Injector

The core component of any rocket engine is it’s fuel injector. Pintle injectors
are known for it’s easy of control, superior injection performance
and low manufacturing costs.
IST have developed in conjunction with the University of Tokyo,
the latest in pintle injector technology, greatly increasing
engine efficiency and minimizing vehicle size.
Pintle injectors were first used for the Apollo Lunar lander, but fell out of fashion
when larger rockets became the norm. In recent years, it’s making a come back,
being used for major engines like the SpaceX Merlin engines.
※IST’s avionics testbed uses convetional injectors.

conventional injector

Design and Materials

Our design and choice of materials is driven not just by performance, but by ease of procurement and cost.
Most of the major components are fabricated in house,
Using the best mix of legacy and latest manufacturing methods, and easily available materials.
There is no “state of the art” at IST, “if it works, go for it” is our policy.


No simulation trumps a real experiment.

We do testing. A lot of testing.
Since we fabricate our components in house,
IST runs tests at lightning fast rates.
By the time your launch is ready, it won’t be something out of a drawing board.
It will be tried and tested.