"Fat Boy" 12/118 thrust engine

[madrocketscientist]

John,

Where did you source the inconel wire?

Thanks,

Shannon.

[racket]

Hi Shannon

I purchased it >15 years ago , along with a 4"dia X 1" disc of Inco 600 and some flat to make up a freepower turbine wheel for my TV84 gas producer , the Inco wire is welding wire , I had to purchase a kilo of it at the time and its been sitting around doing nothing all these years so I thought I'd put it to some use , I used up the Inco 600 flat making NGV vanes , still have the disc sitting around , hopefully one day I'll find a use for it .

I think it was purchased from Wright Metals , I don't know if they're still in business though, there are suppliers of Inco in Oz , so they'd have welding wire for it, its pretty tough stuff and makes a good spring that takes probably 10 kgs of force to pull through it the tubing to get it in place, I'll bend over a bit at the evap bellmouth inlet to prevent it moving further in .

Heres a Link that might be of help , it looks like Wright Metals has been "absorbed" www.australwright.com.au/products/nickel-alloys-high-performance-alloy/

Cheers
John

[racket]

Hi Guys

The Inco tubing for the evaps still hasn't arrived those bloody Kiwis must have sent it by canoe I'll reorder on Monday .

Meanwhile I've fitted an impingement air start to the comp cover

postimg.org/image/gc4b193sr/4f866dcf/


postimg.org/image/stayo7gwb/cf77aa52/

LOL.................lets hope these Links work

Yep , they worked , so heres a pic of the modified evap tube with its spring insert attached to the garden hose , nicely swirling spray at 10 lpm postimg.org/image/pcnltfp2j/76bfd4f6/

Cheers
John

[madrocketscientist]

Feb 24, 2018 16:41:16 GMT -5 racket said:

Hi Guys

The Inco tubing for the evaps still hasn't arrived those bloody Kiwis must have sent it by canoe I'll reorder on Monday .

Sounds about right, welcome to NZ's 3rd world postal system!! stuff gets from overseas to Auckland in two days, then takes a week to get here. Don't forget the canoe has to fight the NW airflow across the Tasman.....

Shannon.

[racket]

Hi Shannon

LOL..........if we combine the NZ postal service with our pathetic one here in OZ , maybe I'd better give it another week to arrive , heh heh , it was "only" posted on the first of this month.

When I sent the X858 comp wheel to Andy M , despite sending it "Priority???", it took 4 days to get from my local PO to Sydney and onto a plane, its only a 4 hour drive away, one extra day to go half way around the world, then delivered the following day,.......... something is terribly wrong with our postal systems , I can get a couriered package from Melbourne (>1,000 km away) to me overnight , why do the postal guys take a week even when you pay extra for "fast delivery"............its very frustrating .

Thats my rant over for the day, its stinking hot and humid so can't get into my shed , ..........another day wasted sitting in the house with the aircon :-( time to get a book out and have a read .

Cheers
John

[turboron]

John, I recommend "Principles of Turbomachinery" by D. G. Shepherd. He does a great job of explaining the principles in clear language.

If you want fiction try the Jack Reacher series by Lee Child.

Thanks, Ron

[finiteparts]

Hey John,

I picked up this center section the other day on eBay for $100!  It has some damage to the impellers that might be able to blended out and re-balanced, but mainly it was for bragging rights! Ha!!!

This thing has the following dimensions:

Caterpillar P/N: OR9809

Compressor:
    Inducer Diameter = 4.360 inches (110.7 mm)
    Exducer Diameter = 6.720 inches (170.7 mm)
    Hub diameter = 1.90 inches
    B-Width = 0.45 inches

Turbine:
    Inducer = 5.70 inches (~ 145mm)
    Exducer = 5.50 inches (~ 140 mm)
    Hub diameter = 1.70 inches
    B-Width = 1.0 inches

This came off of a Caterpillar 793B truck with a 3516B engine, V16, 69 liter, 2100+ hp engine that takes four of these turbos to feed it!  The seller said that the core price for this center section was over $7900, but since this was damaged in shipping, it was worthless.  I don't know about that...it was definitely worth a $100 to me!

If it had the opposite rotation, it might have worked with your compressor! I'll have to use this thing somehow.

I also finally got the Upload Image button to reappear...don't ask me how...it is gone from the quick reply, but it is in the standard reply window.








Enjoy,

Chris

[racket]

Hi Chris

Nice find :-)

Now why does that comp wheel look familiar, HZTL on the backplate ............... www.worldturbocharger.com/ProductShow_1542.html
go down to the ABB section here italiaturbo.oneminutesite.it/files/4-2-Compressor_Wheel-D-2013.05.23.pdf
its an ABB turbo , very expensive ..........well worth making something from it , it has a fairly good distance between comp and turb wheels for a combustor

Mmmmm, if only I can find that turbine wheel , I considered using that billet E and E wheel with a Yili Castings 145 mm axial wheel and NGV www.alibaba.com/product-detail/145mm-turbine-wheel-ngv-model-jet_60570584953.html as I think the rotational direction is the same .

Yep , bragging rights :-)

Cheers
John

[azwood]

Feb 26, 2018 0:46:47 GMT -5 racket said:

Hi Chris

Nice find :-)

Now why does that comp wheel look familiar, HZTL on the backplate ............... www.worldturbocharger.com/ProductShow_1542.html
go down to the ABB section here italiaturbo.oneminutesite.it/files/4-2-Compressor_Wheel-D-2013.05.23.pdf
its an ABB turbo , very expensive ..........well worth making something from it , it has a fairly good distance between comp and turb wheels for a combustor

Mmmmm, if only I can find that turbine wheel , I considered using that billet E and E wheel with a Yili Castings 145 mm axial wheel and NGV www.alibaba.com/product-detail/145mm-turbine-wheel-ngv-model-jet_60570584953.html as I think the rotational direction is the same .

Yep , bragging rights :-)

Cheers
John

Is it possible to make a multiple chamber engine from a cartridge I think Alison made a design something like that the compressor and turbine covers would have to be hand made but it would be a great little engine if it worked I had thought about this for my holset

[racket]

Yep , it'd be possible.

World Turbo www.worldturbocharger.com/default.asp supposedly do a nice GT6041 CHRA for ~$US850 , 98 mm inducered Billet comp , the CHRA is for Cat turbos ,E and E Part Number GT60-000 Billet, heres the billet comp wheel www.worldturbocharger.com/ProductShow_1766.html

Cheers
John

[azwood]

Could make a nice compact engine for a bike

[racket]

Yep , I've thought about using a CHRA but feel we're only saving a fairly easy job in making the shaft tunnel.

Using the full CHRA , the extra complications of trying to modify existing comp backplate and turb heatshield etc might not outweigh making a shaft tunnel, then theres the extra bulk of the center housing oil in/out castings ...............in the end I shelved the idea , its either a standard DIY engine with a "sore thumb" combustor on a turbo , or a micro type engine that only uses the turbo rotating/bearing bits.

Most modern turbos are fairly compact devices, so finding space for it isn't much different to finding room for a micro engine , its only the "sore thumb" combustor that is bulky, and its hard to reduce its size/volume without compromising combustion, the micro type combustor with its multiple fuel injection points still needs the same cross sectional area as a sore thumb , but the extra injection points make for a shorter length , even though length/diameter ratios of the combustion "segments" aren't a lot different .

We could fit one of our micro flametubes onto a turbocharger scroll , but the long transition piece between our annular flametube and the scrolls relatively small inlet would make for a combustor not a lot shorter than a conventional "sore thumb" .

Maybe I should think on this a tad more ;-)

Cheers
John

[azwood]

Mar 11, 2018 19:40:21 GMT -5 racket said:

Yep , I've thought about using a CHRA but feel we're only saving a fairly easy job in making the shaft tunnel.

Using the full CHRA , the extra complications of trying to modify existing comp backplate and turb heatshield etc might not outweigh making a shaft tunnel, then theres the extra bulk of the center housing oil in/out castings ...............in the end I shelved the idea , its either a standard DIY engine with a "sore thumb" combustor on a turbo , or a micro type engine that only uses the turbo rotating/bearing bits.

Most modern turbos are fairly compact devices, so finding space for it isn't much different to finding room for a micro engine , its only the "sore thumb" combustor that is bulky, and its hard to reduce its size/volume without compromising combustion, the micro type combustor with its multiple fuel injection points still needs the same cross sectional area as a sore thumb , but the extra injection points make for a shorter length , even though length/diameter ratios of the combustion "segments" aren't a lot different .

We could fit one of our micro flametubes onto a turbocharger scroll , but the long transition piece between our annular flametube and the scrolls relatively small inlet would make for a combustor not a lot shorter than a conventional "sore thumb" .

Maybe I should think on this a tad more ;-)

Cheers
John

I had another look at the carriage I get what your saying it's less than a perfect layout for multi chamber setup but was worth a thought still I'd love to see it done

[racket]

Hi

Back in the Yahoo DIY Gas Turbines Site times , a guy once used a ST/VT 50 turbo to construct a sort of hybrid engine combining some turbo parts , but considering all the work involved , it wasn't one thing or the other , it was still a fairly bulky arrangement.

Cheers
John

[racket]

Hi Guys

Inco tubing has finally arrived , time to make the new evaps :-)

Cheers
John