HX 82 102/255 " Money Pit "

[Deleted]

Oct 21, 2018 10:50:39 GMT -5 CH3NO2 said:

Hi Andy,

With the tooling and aerospace grade parts being fabricated it's easy to see why the thread is titled "Money Pit".
It might even make sense to turn all the tooling, time, work and investment into a commercially available microturbine.

Tony

It is a good point, and has been talked about at little by me and others.... It is still a diy engine, no more than Anders or John's .

I have just gone about building another way with the CNC work, yes this makes it easily reproducible to a point.

But if it could be commercial i don't know yet, would be nice to offer it to others.... a lot will depend on how well it works.

The cost of building this one will be a little skewed, as i have had help with some of the costs, the CNC work is being done at a very good rate.

Cost of tooling made for first one, clearly will not impact on the next etc

Think once it's running and prove a good engine, perhaps look at the costs..... but I am sure it would be a lot cheaper than RC engine making the same power

All The Best
Andy

[Deleted]

So it has taken a few weeks, but finally got a new video done




All The Best
Andy

[Johansson]

I am so looking forward to the final assembly and test run!

[Deleted]

Just a few more pictures of the progress on the new engine. Terry tells me today " he plans to have all parts done by the end of next week" :-) This means i can do first assembly of the engine, check how things fit, tolerances etc.











Getting there, few weeks yet till first start , but good progress

[Deleted]

Got The mark 3 ignition box working today, improved firing rate

[racket]

OUCH!!! that looks dangerous :-)

[Deleted]

Nov 1, 2018 17:56:24 GMT -5 racket said:

OUCH!!! that looks dangerous :-)

Yep i not be licking it to test if its working :-)

Making spare now i worked out how to do it, to have swap out at track, in hope i not need it

But pleased i got power up and rate :-)

All The Best
Andy

[Deleted]

Hi Guys

No new pictures yet, but soon i hope

So I am trying to fix an issue before, or an issue i may not have ?

I use normally the same oil pump as Anders is having issues with on the bike, in fact i think i suggested it to him, and now feel real bad as he's having issues :-(

But on both my bike and kart they have worked well

BUT !!!!

The new engine both him, and i are working on seem to have more demanding oil requirements, so i am looking at using one of these



Specs
www.argo-hytos.com/products/hydraulic-drives/gp1l.html

Yes it an hydraulic pump, but it should work fine, making 6 to 7 bar it can do with no issue, replacements parts are no issue
and some thing i understand, as i have worked with them for years.

Things will be powered by something like this



Specs
alienpowersystem.com/shop/brushless-motors/aps-6355-outrunner-brushless-motor-230kv-2200w/

I will have to make up some kind of mounting solution etc, electronics to control it will be like i have for the bike starter but smaller

Please let me know what you think

[madpatty]

Hi Andy,

I have been using hydraulic pumps since day 1 on all my engines and engine experiments.

Never had any problems.
They easily push 100psi of pressure which is more than enough for any turbo.

But these pumps tend to have higher power requirements than other gear pumps due to maybe?? Tighter tolerances.

I have been running them on 0.5hp AC motors.

Now I am working on designing a setup that can run on dc power.

Cheers.
Patty

[Deleted]

Nov 7, 2018 20:51:58 GMT -5 madpatty said:

Hi Andy,

I have been using hydraulic pumps since day 1 on all my engines and engine experiments.

Never had any problems.
They easily push 100psi of pressure which is more than enough for any turbo.

But these pumps tend to have higher power requirements than other gear pumps due to maybe?? Tighter tolerances.

I have been running them on 0.5hp AC motors.

Now I am working on designing a setup that can run on dc power.

Cheers.
Patty

Yep, mite even think about using one on the afterburner. it's going to need lots of fuel, more than i think the Bosch EFI can give, even at 18 volts.
The cost of putting one of these units together will be less than that of a new Bosch 044 pump, or the oil pump i use now

The motor i think at i'ts max is rated at 2.2kw, but i will be only running it at less than half its rated power.
And I am only hoping for a good 6 Bar, so not pushing things to hard

All The Best
Andy

[Deleted]

Hi Guys,

so Terry has been working his magic again. This is the penultimate piece of the engine, The shaft tunnel. After this there is only the exhaust section to do. But getting this part will enable me to test assemble the engine. Work out and cut the tube for the outer can, fit bosses for oil inlet and return and so many little thing towards the finished engine









All The Best

Andy

[Johansson]

Nice! I assume you will fit guide pins between shaft tunnel and the housings to get consistent alignment.

[Deleted]

Nov 10, 2018 5:23:15 GMT -5 Johansson said:

Nice! I assume you will fit guide pins between shaft tunnel and the housings to get consistent alignment.

Not Sure, see how it all goes together, the shaft tunnel fit inside a boss front and rear


The back of the compressor diffuser plate




The back of the NGV section

The hope was i would not have to pin, but like i say will see how it all goes to gether


All The Best
Andy

[racket]

Hi Andy

I generally just "clock" my parts during assembly so that parts always end up in the same relative "circumferential??" positions , theres not that much radial clearance between holes and screws , so a small twist generally in the direction of rotation, having rebates for the shaft tunnel in both diffuser back wall and NGV front wall keeps everything in radial alignment .

Thats a nice looking shaft tunnel coming together there :-)

Cheers
John

[Deleted]

Nov 10, 2018 16:01:53 GMT -5 racket said:

Hi Andy

I generally just "clock" my parts during assembly so that parts always end up in the same relative "circumferential??" positions , theres not that much radial clearance between holes and screws , so a small twist generally in the direction of rotation, having rebates for the shaft tunnel in both diffuser back wall and NGV front wall keeps everything in radial alignment .

Thats a nice looking shaft tunnel coming together there :-)

Cheers
John

Thanks John, will chat with you more in the week...

Had another good at the video, erm.... not much better i think but.... who knows



All The Best
Andy