Author Topic: Some of my stuff  (Read 7168 times)

Offline rythmnbls

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Some of my stuff
« on: August 11, 2015, 04:05:34 PM »
Encouraged by Anthony, here's photos and some links to some of the stuff that keeps me out of mischief :)

A small gas turbine built in 2012.




Photobucket link to a slide show of the build.
http://s87.photobucket.com/user/madluther/slideshow/Turbine%202
http://s87.photobucket.com/user/madluther/Turbine%202/story

Some mods made to an X2 mini mill, this is still a work in progress.


Slide show and story links
http://s87.photobucket.com/user/madluther/slideshow/Mill
http://s87.photobucket.com/user/madluther/Mill/story

Thanks for looking.

Steve.


Offline vtsteam

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Re: Some of my stuff
« Reply #1 on: August 11, 2015, 10:54:01 PM »
Always wated to do one of those. I've had Schrekling's and Kamp's books forever.  :thumbup: :thumbup: :thumbup: :clap:
I love it when a Plan B comes together!
Steve
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Offline Brass_Machine

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Re: Some of my stuff
« Reply #2 on: August 13, 2015, 11:51:14 AM »
Hi Steve,

I perused the pictures. I had been playing with Acytal to do bearings as well.. but never got very far. How do you like them?

Eric
Science is fun.

We're all mad here. I'm mad. You're mad.

Offline rythmnbls

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Re: Some of my stuff
« Reply #3 on: August 13, 2015, 01:28:12 PM »
Hi Eric,

Thanks for looking in.

I like the acetal nuts a lot. The thread here at homeshipmachinist got me started on them. They are fairly easy and quick to make but it does take a little bit of time and fiddling to get them just right.

They have good and bad points.  Good points: Zero backlash and very low wear. Bad points: They are temperature sensitive.  A nut made at 20 oC will be tighter at 0oC and looser at higher temps, but as I get older I prefer the shed temps to be around 20 degrees C so its not that big of a drawback.  The lesson here is make the nuts at the temperature that they will be used at.

Regards,

Steve.

Offline Arbalist

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Re: Some of my stuff
« Reply #4 on: August 13, 2015, 05:19:14 PM »
Nice turbine Steve, have you seen this.



Offline rythmnbls

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Re: Some of my stuff
« Reply #5 on: August 13, 2015, 06:29:09 PM »
Quote
Nice turbine Steve, have you seen this.

Thanks !
I hadn't seen that video before, I have seen some Yves Rossi's earlier flights on YT. Definitely something for the bucket list ( conditional on winning a lottery or two :) )

Regards,

Steve.

Offline vintageandclassicrepairs

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Re: Some of my stuff
« Reply #6 on: August 13, 2015, 06:52:24 PM »
Hi rythmnbls,
Brilliant work indeed ,
I have been following a  home made turbine powered LSR bike build  on the forum link below

http://www.landracing.com/forum/index.php/topic,12527.0.html

68 pages so its quite a read, well worthwhile though :jaw:

Best regards
John

Offline rythmnbls

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Re: Some of my stuff
« Reply #7 on: August 13, 2015, 08:12:08 PM »
Quote
Brilliant work indeed

Thanks again !

Its a small world,
Anders' bike is quite famous, he has build thread on the JATO forum at http://jetandturbineowners.proboards.com/ as well

Here's the thread http://jetandturbineowners.proboards.com/thread/53/landspeed-bike-diy-gas-turbine

Regards,

Steve.

Offline SteveT

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Re: Some of my stuff
« Reply #8 on: September 02, 2015, 05:15:08 AM »
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
Steven Tyrer
lives in Cardiff South Wales

Offline Joules

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Re: Some of my stuff
« Reply #9 on: September 02, 2015, 08:04:21 AM »
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.
Just get doing and make swarf, you can decide what its going to be later.   :thumbup:

Offline rythmnbls

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Re: Some of my stuff
« Reply #10 on: September 02, 2015, 02:23:38 PM »
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

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.

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

Regards.

Steve.

Offline Joules

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Re: Some of my stuff
« Reply #11 on: September 02, 2015, 04:07:22 PM »
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.
Just get doing and make swarf, you can decide what its going to be later.   :thumbup:

Offline rythmnbls

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Re: Some of my stuff
« Reply #12 on: September 03, 2015, 07:56:02 PM »
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.