Turboshaft?

[racket]

Hi

I think I'd be making a static stand to begin with , once all your testing is completed and if there appears to be enough power being produced , then think about a mobile application .

Cheers
John

[elventu]

Dec 28, 2019 17:37:01 GMT -5 racket said:

Hi

I think I'd be making a static stand to begin with , once all your testing is completed and if there appears to be enough power being produced , then think about a mobile application .

Cheers
John

Thank you John!
The idea started because the combustion chamber is thick enough to become a structural part of the frame of a small scooter...😉

[elventu]

Today I almost finished the electrical control box.
It is almost error-proof, what I want to avoid is errors during the startup sequence, expecially overfueling the combustion chamber, since using liquid propane I want to avoid errors.
All the controls are running fine, the control shut off the engine in case of low oil pressure, or too high EGT, the LPG solenoid valve is allowed to open only if some conditions are met (right oil pressure, closed "throttle" valve, EGT under a certain value) the oscillator circuit for the ignition is running flawlessly, I have only to connect some wires between the starting fan speed controller, but I haven't the right fastons for the automotive relay holder I use for the fan power supply.
I must buy them during next week.

I relally want to hear the KKK hiss, but I have to finish the centrifuge before...

And I also have to do the motorcycle driving licence exam in next days...finger crossed, here in Italy the exam seems to be a little difficult.😂

[elventu]

Today I milled out from a bar the flange for the oil inlet of the turbo.
I installed it with a thin layer of anaerobic sealing compound, and I tried to clean the turbo from the old and sticky protective oil it has inside since 1986😂
I flushed the core assy with some WD40 and compressed air, and it seems to turn just a little better, I tried to spin it with compressed air for a moment and it reached a good speed.

After that, I decided to put in some oil to protect the bearings in this (I hope short) period, I used some 5W-40 oil and compressed air to push it in place, with a transparent rubber pipe (to ensure to fill the bearings with oil, without flushing it out with the air).
Maybe because of the low temperature, maybe not, but the turbo can't reach half the speed it reach with WD40.
I think it is normal, I hope that with some heating during the starting procedure it can run freely, or maybe I can have a problem to solve.

[racket]

Cold oil will produce a lot more drag than WD40 .............so its normal :-)

[elventu]

I know, but I hoped the movement can be more free than I found 😉

I watched your recent videos on YouTube, John.

So interesting!
Thank you!

[racket]

As long as a flick of the comp wheel with a finger can produce several revolutions of the rotor its OK .

Try warming the entire turbo as that will also help .

Thanks for the vid feedback , much appreciated :-)

[elventu]

Jan 6, 2020 18:25:39 GMT -5 racket said:

As long as a flick of the comp wheel with a finger can produce several revolutions of the rotor its OK .

Try warming the entire turbo as that will also help .

Thanks for the vid feedback , much appreciated :-)

Er...no, maybe the tiny dimension of the turbo (compressor wheel has an inducer diameter of 42mm...) doesn't help, but with a flick to the wheel the rotor make less than one revolution...

Hope heat will help (the oil and the turbo during the test were at less than 5°C), oil were so thick!

Maybe in next days I try heating the turbo with my hot air gun for several minutes!

[elventu]

Off topic funny facts.
Searching on youtube of turbine cars, I found the McKee Hownet TX.

The first video I found was recorded in the month I decided to resume my turbine projects...not far from here, at the Imola circuit...😂