Technical Details

The Stratos II+ rocket is almost 7 meters long and has a diameter of 20 centimeters. From top to bottom the rocket is comprised out of: the capsule, fairing containing parachute, nitrous oxide tank, engine control unit and the engine module. At liftoff the rocket will have a mass of 185 kg and will accelerate from 0 to 100 km/h in less than 0.9 seconds.

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The engine, dubbed DHX-200 Aurora, produces an peak thrust of 11 kN, enough to lift a small car. It runs on nitrous oxide as oxidizer and a mixture of sorbitol (coffee sweetener), paraffin (candle wax)  and aluminium as fuel. The engine will run for a total of 23 seconds at an average thrust of 8 kN, delivering around 180 kNs of total impulse. A total of 85 kg of propellant is consumed during the launch.

The hybrid rocket engine has been ground tested fourteen times at the facilities of TNO Rijswijk in the Netherlands and DLR Trauen in Germany.

Structure

The rocket is 7 meters long and constructed primarily out of aluminium. To enable radio communication, the nosecone is made from fiberglass. It is divided into several subsections that can be put together for assembly and launch.

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Housed in the fairing and the lower third of the nosecone section, dubbed capsule, there is a dual parachute system, consisting of a small drogue to stabilize the rocket during the supersonic descent and a main parachute for the final 2-3 km of its trajectory.

Electronics

The flight computer and telemetry are in-house developed and measure various system parameters such as tank and combustion chamber pressure, accelerations, atmospheric pressure, orientation of the earth magnetic field and the power being used by the subsystems.

Capsule

 

The capsule is one of the most important parts of the rocket, since it enables us to fulfill the scientific goals of the mission.

In the upper section of the nosecone the flight computer, power- and data management systems, down-links and commercial payloads are situated. Several institutes have shown their confidence in the project and acquired CubeSat standard PCB payload slots on board to fly their experiments.