Author Topic: Nemett 15cc 4 stroke engine  (Read 41064 times)

Offline sbwhart

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Re: Nemett 15cc 4 stroke engine
« Reply #50 on: August 30, 2011, 10:13:42 AM »
Real nice neat work Roy

 :thumbup: :thumbup: :thumbup:

 :clap: :clap: :clap:

 I've bin quetly following along.

Stew

A little bit of clearance never got in the road
 :wave:

Location:- Crewe Cheshire

Offline Stilldrillin

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Re: Nemett 15cc 4 stroke engine
« Reply #51 on: August 30, 2011, 12:01:52 PM »
COR!!  :bugeye:

I really like that little carb......  :thumbup:

David D
David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #52 on: August 30, 2011, 12:59:57 PM »
Thanks, I just hope the darn thing works. :doh:

Roy.
I used to be confused, now I just don't know.

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #53 on: September 03, 2011, 10:42:05 AM »
Hi
just a couple of bits.
now I've got a rotary table I can do the con rod.
I've also made and fitted the piston rings.


cheers
Roy
I used to be confused, now I just don't know.

Rob.Wilson

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Re: Nemett 15cc 4 stroke engine
« Reply #54 on: September 06, 2011, 01:11:25 PM »
Hi Roy  :bow: :bow: :bow:


you have made a cracking job of making the  carb  :bow: :bow: :bow:   and some dam fine machining on the rest of the engine parts too  :thumbup:,,, i will be watching this build as i fancy building this engine one day .


Rob

Offline DaveH

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Re: Nemett 15cc 4 stroke engine
« Reply #55 on: September 06, 2011, 01:29:39 PM »
Roy,

Very nice work, - smashing carb :thumbup: :thumbup: :thumbup: :clap: :clap: :clap:
 :beer:
DaveH
(Ex Leicester, Thurmaston, Ashby De La Zouch.)

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #56 on: September 06, 2011, 01:31:27 PM »
thanks guys.
Roy
I used to be confused, now I just don't know.

Offline Brass_Machine

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Re: Nemett 15cc 4 stroke engine
« Reply #57 on: September 06, 2011, 02:45:33 PM »
Wow... Looking good!

Eric
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We're all mad here. I'm mad. You're mad.

Offline doubleboost

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Re: Nemett 15cc 4 stroke engine
« Reply #58 on: September 06, 2011, 06:05:07 PM »
Hi
Roy
That piston & rod look great  :thumbup: :thumbup: :thumbup:
I like the needle roller in the big end  :bugeye: :bugeye: :bugeye:
Some very nice machining there
John

Offline madjackghengis

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Re: Nemett 15cc 4 stroke engine
« Reply #59 on: September 07, 2011, 01:47:44 PM »
Hi
I dont usually embarrass myself in public but I had to take a pic of this.
poor mans DRO.
can I nominate it for bodge of the year? :lol:

I had to move the mill table an exact amount for the hole centres of the con rod for this engine.
steel bar clamped to the lathe tray, square clamped to that, digital caliper clamped to the mill vise and the other bit of the caliper clamped to the square.

piece of wood to take out the spring. :bugeye:



am I mad or what?

Roy


That can be no embarrassment, but rather the cobbled together accuracy test of the decade, and should be enshrined with a framed picture on the wall of your shop.  I'll second that call for "bodge of the year!! :nrocks: :bow: :mmr:  :beer: Cheers, mad jack
« Last Edit: September 08, 2011, 02:23:55 AM by Stilldrillin »

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #60 on: September 17, 2011, 12:06:59 PM »
Hi
another step forward.



cambox.

more to follow soooooon :D

Roy
I used to be confused, now I just don't know.

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #61 on: September 27, 2011, 08:05:20 AM »
Hi
more progress, the cylinder head is finished ( apart from pressing in the valve guides when I get some phosfor bronze to make em.)

heres the top

and the bottom

and all dressed up


I think I will attempt the cams next.

thanks for looking.
Roy
I used to be confused, now I just don't know.

Offline Stilldrillin

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Re: Nemett 15cc 4 stroke engine
« Reply #62 on: September 27, 2011, 08:13:37 AM »
They're all looking really good Roy!  :clap: :clap:

Keep 'em coming......  :thumbup:

David D
David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Offline DaveH

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Re: Nemett 15cc 4 stroke engine
« Reply #63 on: September 27, 2011, 01:13:22 PM »
Roy,

Some very nice maching  :thumbup: :clap:

Looking great :thumbup: :clap:

 :beer:
DaveH
(Ex Leicester, Thurmaston, Ashby De La Zouch.)

Offline Brass_Machine

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Re: Nemett 15cc 4 stroke engine
« Reply #64 on: September 27, 2011, 02:00:26 PM »
Roy,

That is looking sharp!

Eric
Science is fun.

We're all mad here. I'm mad. You're mad.

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #65 on: September 28, 2011, 11:50:48 AM »
Hi
a bit more done.
cams cut, fitted to shaft and installed in cambox.


cheers
Roy
I used to be confused, now I just don't know.

Offline NickG

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Re: Nemett 15cc 4 stroke engine
« Reply #66 on: September 29, 2011, 10:31:51 PM »
Wow, really nice work on the head  & cambox.  :thumbup: It is a really nice design this engine. 
Location: County Durham (North East England)

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #67 on: September 30, 2011, 08:33:11 AM »
thanks for the nice words guys, this is the first major thing I've built and the encouragement is appreciated.

and now, the beast temporarily assembled.



not far now.

Roy
I used to be confused, now I just don't know.

Offline Stilldrillin

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Re: Nemett 15cc 4 stroke engine
« Reply #68 on: September 30, 2011, 08:37:31 AM »
Looking purposeful Roy!  :thumbup:

David D
David.

Still drilling holes... Sometimes, in the right place!

Still modifying bits of metal... Occasionally, making an improvement!

Rob.Wilson

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Re: Nemett 15cc 4 stroke engine
« Reply #69 on: September 30, 2011, 08:38:26 AM »
 :drool: NICE ONE Roy  :clap: :clap: :clap: :clap: :clap: :clap:

Thats a mighty fine looking engine ,,,,,, well done  :thumbup:  I will be looking forward top seeing the video of her running  :)


Rob


Offline madjackghengis

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Re: Nemett 15cc 4 stroke engine
« Reply #70 on: September 30, 2011, 12:04:36 PM »
It looks like you're really getting close now, we ought to be treated to some sound and fury out of the little beast fairly soon I expect.  Very nicely done, fine craftsmanship all the way. :bugeye: :jaw: :beer:  Cheers, mad jack

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #71 on: October 04, 2011, 03:58:59 PM »
Hi all
I had a bit of a shock earlier, I made the timing disc to set the timing and discovered to my horror that the cams  were assembed wrongly on the shaft. :doh: :doh:

I managed to break the loktite grip with a small blowtorch so now I can do it again PROPERLY :bang: :bang:

Oh well, something had to go wrong sooner or later.

Roy
« Last Edit: October 04, 2011, 04:59:48 PM by wheeltapper »
I used to be confused, now I just don't know.

Offline madjackghengis

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Re: Nemett 15cc 4 stroke engine
« Reply #72 on: October 06, 2011, 11:36:38 AM »
It is a long honored tradition in the far east, China in particular, but other places as well, to deliberately insert an error in a work, whether art, building, dish, everything which demands skill, just to demonstrate no intent of challenging the perfection of creation.  It is said that failing to do so will invoke an unintended error, which will interfere with the intended job one is doing, so maybe you need to put a flaw in it, so you won't get something else wrong.  I think some of these old traditional thoughts which have echoes in our own societies are of real value in putting our work and lives into perspective in the world at large.  Lots of fine looking parts, and getting awfully close to a finish line I hope.  Very nice work, and it should be a great runner. :jaw: :beer:  Looking forward to video, cheers, mad jack

Offline SCOOTER

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Re: Nemett 15cc 4 stroke engine
« Reply #73 on: October 12, 2011, 09:07:02 PM »
Nice looking engine and some realy nice machining i am looking forward to seeing her run. :clap:

Offline wheeltapper

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Re: Nemett 15cc 4 stroke engine
« Reply #74 on: October 14, 2011, 12:37:38 PM »
THE BEAST LIVES :D :) :D :)

It only works.

here are some pics of it ready to run,





and a couple of videos,




and some pics after stripping, cleaning and shining up a bit,





Am I chuffed or what?

hope you guys enjoy .

cheers
Roy
I used to be confused, now I just don't know.