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I have nothing to say for my protection. I've gone totally off the deep end. I've always wanted a jet
engine (from the moment I found out that these things exist) but building one?!?!? Yup, send for the
people with the white coats...
Seriously, I've always been interested in mechanical things and this promises
to be a lot if fun. |
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First off, here are the parts I need. I know it's rather small so you can click on it to enlarge it. |
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And this is how it fits together. (no large picture yet) |
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O.k. Let's start with the parts I bought. Here we have the compressor and the diffuser. The compressor is a stock Allied Signal/Garrett compressor (446335-10). It's surprisingly small (everything on this engine is) and made of aluminum. It came re-profiled and balanced. The diffuser is a real jewel. It's a CNC milled aluminum part that is really complex. I could have made it myself but my guess is that doing it would have taken me the better part of this century. |
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Here's the turbine and the NGV. The turbine is cast out of Inconel 714c and is really neat just to look at. I bought the machined turbine for two reasons: 1) Buying the drill and reamer needed to complete the turbine would have cost more than the difference, 2) I don't think that I want my first boring and reaming experience to be on a really expensive part that's made of a really tough metal. The NGV (Nozzle Guide Vanes) is cast out of Stainless Steel and is also a wonderful lost-wax cast. As you can probably see, I bought this part machined as well. The reasons are that I thought that machining it would be difficult and that I probably would mess it up (again, not something you want to do with an expensive part). As I see it, I saved a fortune on broken taps. |
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Here's the combustion chamber (combustor). Now you may think I'm just lazy and that I could have saved quite a bit of money on buying the parts and constructing this myself. You may be right. But looking at the work Wren did here I'm not sure I could have spot welded this together so well. It's really accurate and solid. It's fun just looking at it. |
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Here's a close-up of the compressor showing the result of the balancing process. Quite a bit of material taken out of the hub. |
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Rear shot of the diffuser. You can also see the filter ring and lubrication feed line. |
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