My greatuncle was a plumber and tinsmith, my grandfather was a carpenter. Myself I am a physicist with strong engineering backgrojund. You have my fullest sympathy.
Engineer your way around govmt as best as you can. Sound manufacturing and engineering is fun to do and immensly important.
I bought a 150 mm polycarbonate tube, but it was special order with a minimum 2.5 metre length.($200. Canadian.) I use pieces as a protective cover for my CD cakebox-designed CD turbines.
Is it true there is a .5 mm clearance for your discs? What happens to the acrylic when the discs explode?
Yes, the ID is 121, OD is 127, wall is therefore 3mm. I don't know if this tube is made for some purpose related to CD's but it is readily available (in the UK anyway).
None of my discs have come apart (yet!).
Regarding torque, I have some strain gauges I may try but I suspect that wiring up a dynamo would be a good measurement. It'd give you a power reading which you could compare with input air to calculate efficiency.
Discs come apart with a vengence at 23,000 to 28,000 rpm. The acrylic may not be sufficient to prevent exit of the discs. Hence my polycarbonate (i.e. bullet-proof) tube suggestion. The end plates aren't so critical. Here's a movie that Mythbusters did that shows the dangers of high-speed CD disc failure...2 inch penetration of test dummy!
Thanks for sharing this! It's great to see a new Tesla Turbine being brought to life. Have you considered polycarbonate tube and plate instead of acrylic?
I think,for the end plate assemblies, you could use any suitable material. Nylon, aluminium or even good plywood. The tricky part will be the volute (the round part). I've only ever seen 121mm ID tube in acrylic but if you could get it in polycarbonate then go for it!
@blacksilkblacksilk is your name by any chance Dell Conagher?
howitzer247 1 year ago
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Aaliyanalacey 1 year ago
An engineer with a scottisch accent.
Seems Scotty is alive and well.
Great consturction video.
Greetings
silk
;-)))
blacksilkblacksilk 2 years ago 2
Successive UK governments have been unable to totally destroy British manufacturing but they continue to try their hardest to finish us off.
evildrome 2 years ago
My greatuncle was a plumber and tinsmith, my grandfather was a carpenter. Myself I am a physicist with strong engineering backgrojund. You have my fullest sympathy.
Engineer your way around govmt as best as you can. Sound manufacturing and engineering is fun to do and immensly important.
Do not give up brother.
Thank you very much for posting these vids.
Have a nice day
silk
;-))
blacksilkblacksilk 2 years ago
If you're going to push your discs to the limit (and why not?) then I agree that the polycarbonate tube is a good idea.
I still think that all the useful science that can be done, can be done under 18k rpm.
Well... apart from the science of catastrophic failure :)
Cheers, Wilson.
evildrome 3 years ago
I bought a 150 mm polycarbonate tube, but it was special order with a minimum 2.5 metre length.($200. Canadian.) I use pieces as a protective cover for my CD cakebox-designed CD turbines.
Is it true there is a .5 mm clearance for your discs? What happens to the acrylic when the discs explode?
Have you found an easy way to measure torque?
cheers,
rick
MrfixitRick 3 years ago
Yes, the ID is 121, OD is 127, wall is therefore 3mm. I don't know if this tube is made for some purpose related to CD's but it is readily available (in the UK anyway).
None of my discs have come apart (yet!).
Regarding torque, I have some strain gauges I may try but I suspect that wiring up a dynamo would be a good measurement. It'd give you a power reading which you could compare with input air to calculate efficiency.
Cheers, Wilson.
evildrome 3 years ago
Discs come apart with a vengence at 23,000 to 28,000 rpm. The acrylic may not be sufficient to prevent exit of the discs. Hence my polycarbonate (i.e. bullet-proof) tube suggestion. The end plates aren't so critical. Here's a movie that Mythbusters did that shows the dangers of high-speed CD disc failure...2 inch penetration of test dummy!
youtube(dot)com/watch?v=v0QT4Y1Y3ug
MrfixitRick 3 years ago
Thanks for sharing this! It's great to see a new Tesla Turbine being brought to life. Have you considered polycarbonate tube and plate instead of acrylic?
MrfixitRick 3 years ago
I think,for the end plate assemblies, you could use any suitable material. Nylon, aluminium or even good plywood. The tricky part will be the volute (the round part). I've only ever seen 121mm ID tube in acrylic but if you could get it in polycarbonate then go for it!
evildrome 3 years ago