HC5A Kart build

[ausjet]

They're threaded holes that the flange came with. I'll try to use them for mounting to the kart

[racket]

Yep , a good strong place to bolt to , its sorta the centre of gravity for the engine .

[stoffe64]

Aug 20, 2017 5:55:01 GMT -5 ausjet said:

Have been searching for a few days on how to pie cut a cone accurately.. couldn't find any useful info. Plenty of stuff on pie cutting straight pipes. Anywhoo had a crack and eyeballed it. Pretty sharp bend but hoping at the same time it will lose its air velocity quickly like this.

How did you make that Nice bend?,i would need something like that on my build!
Cheers /stephan

[ausjet]

Apr 25, 2018 2:56:12 GMT -5 stoffe64 said:

Aug 20, 2017 5:55:01 GMT -5 ausjet said:

Have been searching for a few days on how to pie cut a cone accurately.. couldn't find any useful info. Plenty of stuff on pie cutting straight pipes. Anywhoo had a crack and eyeballed it. Pretty sharp bend but hoping at the same time it will lose its air velocity quickly like this.

How did you make that Nice bend?,i would need something like that on my build!
Cheers /stephan

I wasn’t entirely happy with that bend pictured above so made a new one which has more of a gradual turn.



There was a lot of estimating and eyeballing making that as I’d never attempted it before. I made the cone first, then for a 90 degree bend, divide 90 into however many segments you want, then half that, and that gives you your degrees either side of centre to make the cuts. I had to make a crude jig to hold the cone straight along its centreline whilst cuts were made on the drop saw.

Make a generous allowance in how much extra length to add when making the cone. As when you cut the big fish mouth at the combustion chamber end, it considerably shortens it. If it’s too long you can always fish mouth it further back until your bend lines up with the compressor outlet. Too little like I did and you end up with an incomplete join. Hope that makes sense.

[stoffe64]

Thank you very much for that information really appreciated mate!
Cheers /stephan

[CH3NO2]

That 90' diffuser looks like a lot of careful, maticulous work.
Great job!

[ausjet]

It’s been too long since an update! I’ve finally managed some solid shed time after finishing my house renovation.
Ive mostly finished off the combustion chamber for now. I tested it with a hydraulic pump and leaf blower. Sort of pointless test as I didn’t have an egt temp probe. None the less, the diesel spray ignited first time off the glow plug and no flames present at the flame tube outlet.



Ive now started working on the kart frame.
I cut the rear axle in half to allow for better manoeuvring and made a central mount that I can shim up/down if needed when all the weights added.



Chopped the rear frame and added a bit more on


Time to get the mounts sorted!


I wanted to use angle iron but only had an 8mm thick piece so it had to do. Super heavy 😳 a few lightening holes sorted that out.


I still have a bit of milling to do then the mounts can be bolted and welded up.

[pitciblackscotland]

You will notice a big difference in steering. I did the same in my turbine mower with the big T30 turbo sitting right on the axle. Keep up the good work.

Cheers,
Mark.

[ausjet]

Feb 1, 2019 14:53:39 GMT -5 pitciblackscotland said:

You will notice a big difference in steering. I did the same in my turbine mower with the big T30 turbo sitting right on the axle. Keep up the good work.

Cheers,
Mark.

I took a bit of inspiration from your mower project with your axle setup 👍🏻 Thinking now whether or not I should put another disk brake on the other side

[pitciblackscotland]

Feb 3, 2019 2:46:14 GMT -5 ausjet said:

Feb 1, 2019 14:53:39 GMT -5 pitciblackscotland said:

You will notice a big difference in steering. I did the same in my turbine mower with the big T30 turbo sitting right on the axle. Keep up the good work.

Cheers,
Mark.

I took a bit of inspiration from your mower project with your axle setup 👍🏻 Thinking now whether or not I should put another disk brake on the other side

I got Inspiration from Smithy, he done the same on his Kart. I don't think he added a second disk brake on the other side.

[azwood]

Can you tell me what advantage a glow plug had over a spark plug.I'm working toward starting mine on diesel fuel and a spray jet just for preheat.

[ausjet]

Feb 4, 2019 7:28:56 GMT -5 azwood said:

Can you tell me what advantage a glow plug had over a spark plug.I'm working toward starting mine on diesel fuel and a spray jet just for preheat.

Another way of doing the same thing really. No relays/coils/high voltage spark generators needed. Just 12v dc. They’re called hot surface igniters. I was hoping it would be a more reliable way to start the big girl up without using propane. Seemed to work fine when I tested the combustion chamber 👍🏻

[azwood]

Feb 4, 2019 20:35:17 GMT -5 ausjet said:

Feb 4, 2019 7:28:56 GMT -5 azwood said:

Can you tell me what advantage a glow plug had over a spark plug.I'm working toward starting mine on diesel fuel and a spray jet just for preheat.

Another way of doing the same thing really. No relays/coils/high voltage spark generators needed. Just 12v dc. They’re called hot surface igniters. I was hoping it would be a more reliable way to start the big girl up without using propane. Seemed to work fine when I tested the combustion chamber 👍🏻

Cool I like it I might try that I've killed a few ark generates getting over them

[ausjet]

Slow going, but progress is being made. Thought I’d give tig welding aluminium a go. This ones for fuel and afterwards will make a smaller one for oil 👍🏻

[Johansson]

Nice welds!