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Some of my stuff

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rythmnbls:

--- Quote ---Very impressive Steve what have you used the engine to power so far?

I used acetyl nuts on my mill conversion after a year still working well

Steve
--- End quote ---

Thanks Steve. So far the engine hasn't powered anything. It's highest calling so far has been a glorified leafblower :)
The original plan was to add free power turbine and fit it to a small bike frame, but, during one of my experiments with combustion flame holders, a largish chunk of heavy nichrome wire melted free from within the combustion liner and exited through the NGV and turbine wheel at about 50K rpm. The damage was slight but the NGV and turbine wheel need to be replaced. Here's a post mortem pic.



The NGV is showing little spots of melted nichrome on some of the blades. Plus some of the blades have broken loose.


This is where the mill mods come in. The mill is in a state where it can take quite heavy cuts in steel and "should" be able to take light to moderate cuts in inconel. So the plan is to make a new wheel and NGV but this time the parts will be mostly CNC machined. The current stumbling block is I have a large chunk of 718 inconel bar stock, but no saw to slice it up.


So the current project is building a power hack saw that can use tungsten carbide blades which is about 70% done.

I love the acetyl nuts, they are a genuine zero backlash solution, cheap and with a quality acme screw, very accurate.


--- Quote ---Very impressive Steve, having worked for a certain UK based turbine engine manufacturer you have done a great job.  I really like the balancer you made, I could do with building one of them myself.
--- End quote ---

Thanks Joules. They wouldn't happen to based in Derby would they ? Always been a keen follower of engineering events there :)

Regards.

Steve.

Joules:
They were much smaller than that, about your engine size  :thumbup:

We sold a few to that place in Derby as it was cheaper blowing up ours than theirs by the apprentices.

rythmnbls:
Ah, perhaps you were  at Wren ? In that case the balancer should be familiar, it is the design published by Mike Murphy in one of the 2001 GTBA newsletters. Older technology, but still capable of producing a nicely running rotor.

Regards.

Steve.

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