Premises of the Small Rocket Project Blog

The aim of this blog was not really clear to the writer at the beginning: there was the wish of bringing together all the knowledge created during the designing and manufacturing process of the rocket; at the same time it was important to document every bit of the experience transmitting the reader the joy of doing such project.

In other words if on the one side the reader will know the procedures and the techniques used to manufacture and build an amatory rocket with the peculiar mission of mounting an egg as a payload and recovering it intact on the ground, on the other he/she will have a good laugh reading about the nerdy adventures of the team from February to May 2017.

As a writer, I just hope to provide sufficient information to anyone who wants to reproduce the project, while keeping the narration entertaining and funny.

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Final Product: A full Carbon Rocket

The Full Carbon Rocket This post aims at showing the final configuration of the rocket giving insight in the details of many subsystems previously not explained. Lower section Arm switch, on off switch, break-wire and LED The electronics part was contained in the upper section. However it had to be linked to the parachute bay in order to trigger the pyro charge. Another important detail was the placement of the switches so that they could be turned on and off from the outside of the rocket. A bulkhead was placed on top of the parachute bay; this had a hole to allow the connection with the pyro charge and it had a bolt on which the stage structure could be screwed on. In addition a metal ring was glued on top of the bulkhead to allow for the switches to be placed on; in this manner a small chamber between the middle and the upper section was created to host the cabling and the switches. Stage Structure, Electronics and wiring One of the most challengin...

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Requirements Generation

Following the system engineering design, the first step to start with the preliminary design of the rocket was understanding the requirements that the mission involved. Generating a requirement list was essential in order to give a more accurate shape to the product we had to obtain. An analysis of the subsystems of the rocket was also made and requirement concerning different subsystems were generated. Requirements List: The maximum flight-time has to be 90 s. This is established by NAVRO which is the association in the Netherlands for amatory rockets. In fact the rocket had to land inside the military area at 't Hard; considering the worse case scenario in terms of wind speed and direction, a maximum time flight was determined considering that the rocket could not go out of the military area in it surely didn't have to fly towards the observatory area. The air space was closed over the military area for the period of duration of the launches. However the maximum ...

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Advanced Design Configuration

So where to start building a rocket? Even though a small rocket such as the one the WBPP didn't have many subsystems, we split up the group so that each one of us could look at the requirement and design his subsystem and then present it to the others. However before going too much into the details of the rocket, the software Open Rocket was used to come up with a first design iteration of our "space" vehicle making sure to meet the requirements given by the safety board. Eventually each subsystem was considered individually and considering load cases, ease of manufacture and systems accessibility before launch design decisions were made. Open Rocket Estimations The engine file corresponding to the one that our rocket would have mounted was uploaded to the designing file; this would have granted us to have reasonable prediction of the rocket's flight in absence of wind. Since the team opted for a separation of the rocket in two parts at the moment of the parac...

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