SKULD 666

[racket]

Hi Mark

Nope , I'll make up a "bush" for the back end , that fits the curvic and have a laby seal on the OD , a complicated piece that will be keyed to the shaft .

Cheers
John

[racket]

Hi Guys

Its been a while since I last contributed to this build Thread , but having cleaned up after getting FM-1 operational again , I started dragging bits for this build back out of the cupboard where they've been hibernating for the last 6 months and found some evaporator prototypes and the tooling for making them so thought I'd add a couple of pics

Evaporators made from 16mm diameter stainless steel bathroom towel railing , nice thin walled stuff for fast heat transfer , also easy to bellmouth with quick hit with a hammer on the end of the flaring tool , then into the D'ing tool where I produce the deformations to produce turbulence and mixing of fuel/air




Close up of a finished evaporator , it looks like 4 "dents" down one side and 3 the other side gives a better finish than if I try and cram in a couple more

[madpatty]

Hi Racket,
So finally you are back with this beast....
needless to say that it will soon be running.....

Cheers,
Patty

[nersut]

Hi John

Amazing that you are building a turbine engine at home that will have more power than the latest Allison M250-C40 with it's 6.1 lbs/sec mass flow, and the M250 was optimized for the last 50+ years!

RESPECT!

Cheers
Erik

[racket]

Hi Patty

LOL.....I don't know about "soon" ..............maybe next year some time if my health holds up and I can get stuck into the build .

Erik

More mass flow , but power will be down due to the lower pressure ratio , I'm looking at no more than 4:1 , but it will probably be thirstier :-)

Cheers
John

[pitciblackscotland]

Good one John,
will there be 18 vap tubes for this engine??

Cheers,
Mark..

[racket]

Hi Mark

Yep , 18 evaps , why change a winning number , nice easy 20 degree spacing :-)

Cheers
John

[ashpowers]

Wow John, I haven't seen this thread until now. Didn't know you were working on a setup like this.

Glad to see you've got your hands back into the jar!

-Ash

[racket]

Hi Ash

Yep ,its nice to be getting my hands dirty and smelling like a bloke again

This engine is probably my last build ,............... where can I go from here, .....if this one doesn't cure the "disease" nothing will :-)

Got a big plasma cut ring of 20mm plate ( 330mm OD with a 130mm hole) in my lathe at the moment to trim down to size for the die to hammer the 2mm stainless sheet flametube ends out on , there'll be a days work getting this ring cleaned up and profiled ............LOL, everything is so slow to do at these sizes, must learn to be patient.

Cheers
John

[stoffe64]

Sept 6, 2014 17:26:10 GMT -5 racket said:

Hi Ash

Yep ,its nice to be getting my hands dirty and smelling like a bloke again

This engine is probably my last build ,............... where can I go from here, .....if this one doesn't cure the "disease" nothing will :-)

Got a big plasma cut ring of 20mm plate ( 330mm OD with a 130mm hole) in my lathe at the moment to trim down to size for the die to hammer the 2mm stainless sheet flametube ends out on , there'll be a days work getting this ring cleaned up and profiled ............LOL, everything is so slow to do at these sizes, must learn to be patient.

Cheers
John

Hey john
I know one thing you could construct,you could make an augmentor for that 666 engine,something like mike talks about,think about the potential thrust output!
Cheers/stephan

[ashpowers]

John,

Have you considered using mandrel bent tubing for your combustor parts like what I did in the T04 engine? It is a lot easier to find an appropriate pipe diameter and centerline radius to make parts like that. You can also get the pipe in a variety of alloys too.

-Ash

[stoffe64]

Hello John,any updates on this cool project?,i hope it is not too cold....cheers\stephan

[racket]

Hi Stephan

No updates , the construction has been put on hold whilst I make the 12/118 engine jetandturbineowners.proboards.com/thread/612/fat-boy-118-thrust-engine , it will be a more useable engine than the SKULD .

Work was progressing on the SKULD until one day whilst looking around for comp wheels for another Member I found the 118mm inducered billet comp wheel and just had to have a go at using it in an engine .

Cheers
John

[stoffe64]

Aha,i understand what you mean,it was The same With My TV61 projekt,sudden i Saw The ad about MY recent project The holset HX60

[madpatty]

Hi Racket,

I know you are not quite fan of using softwares.

But how you decide the length of the shaft, overhang, distance between bearings etc.

Cheers,
Patty