DARE Developing Cryogenic Tanks

Welded and bolted tank concepts (Credit: DARE)

Delft Aerospace Rocket Engineering have been investigating the safe storage of liquid oxygen that could feature in the next rocket project. The team has been looking into 3 different tank designs in order to achieve this, a welded aluminium design, aluminium with sealed bolt on bulkheads and a composite design with an inner liner.

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Roberts Rocket Project Update

One of the many great rocket projects out, there, is Roberts Rocket Project.

This one specifically is a must read for anyone wanting to build and test their own liquid-fueled rocket engine. Over the year’s Robert has built and tested cooled and uncooled rocket engines, his latest prototype engine produces 250lbf (1112N) of thrust, burns liquid oxygen and kerosene, is regeneratively cooled and is machined from aluminium.

His work is very thorough and at a very professional level that is impressive to see come together, there are no shortcuts on this project. This can be seen in the design spreadsheets that he has made available to download, tweak for your own good and use.

Robert has been working on getting his 250lbf regen engine to a point where he is happy with it and work now commences on a rocket that this engine will power.

His latest update from April 5th, 2015 goes into a bit more detail about this rocket and work done so far.

Copenhagen Suborbitals BPM-5 Engine Update

Over the last few months, the guys and girls over at Copenhagen Suborbitals have been working on a small liquid fuelled rocket engine called BPM-5, as a small scale test article in prelude to the much larger BPM-100 that will power their manned Spica rocket on a suborbital flight.

The BPM-5 is designed to produce 1000lbf (4448N), burning a mixture of liquid oxygen (LOX) and ethanol/water as the propellants. This little engine will aid in the mastering of skills required for its big brother/sister not only on a production level but also at an electronics, software and procedures level.

Steady progress has been made where the first full engine is near complete. Work has also been carried out in a throat less version of the engine called the BPM-2, designed to evaluate the fuel and the mixture ratios of the fuel in order to determine the least amount of water required in the ethanol/water fuel mixture.

Engine testing of both engines is scheduled to begin shortly in preparation for the summer flights of their Nexo class of rockets of which the BPM-5 will be powering, more about these rockets in another post.

In the meantime below are a series of videos detailing the BPM-5 engine and its construction up until now.

For more information on the BPM-5 check out the blog on Copenhagen Suborbitals website.