Devlog 02 Tranga Rocket Engine

What I’ve Done So Far

So since the last devlog I’ve done a few things, first I 3d printed the Injection plate and tested the screw fits which worked. Then I went in and did some final fixing up before modeling the combustion chamber and nozzle component.

My Thoughts On A Future Component

One of the next section I need to design in the parts that will intake fuel and oxidizer from the flow lines and inject them into the injection plate, I’m quite concerned about how air tight this component will be and I’ve thought of two main options.

1. I have a ring shaped pipe that has in input for 1/4 inch pipe and little outflows feeding into each injection hole, where this piece meets the injection ports we’ll have tiny rubber O-rings to seal. I’m a bit concerned about the extra machining involved in this part in terms of cost, and I feel that the fuel may flow through some section of the injection plate more than others.
2. We have tiny feed lines the screw into ports on the injection plate and all meet at 1/4 inch pipe junction, with this approach I feel like I might be able to find an off the shelf part but if I can’t this piece would require far too much machining to be worth it.

A bit of crowd sourcing

If anyone knows where I can get solenoid valves and a pressure sensor rated to handle air at 1mpa that would be a big help, I’m new to working with hydraulics or pneumatics or whatever you would call it so I don’t really know what A good price is, I have to pick out the parts during the design phase so that I can design the engine around them. If anyone knows any good options that would be a big help.