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Nemetts 15cc engine

attenpting to build this.

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wheeltapper22/08/2011 19:03:15
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424 forum posts
98 photos
HI
I decided a while ago to try and build this engine.
 
heres a few pics of where I'm up to so far.
 
crankcase nose
cylinder jacket
a start on the head
liner
crankshaft
crankcase

part assembled
thats made a start with most of the big plain machining bits, now for the small fiddley bits.
 
thanks for looking.
Roy
 
Jeff Dayman22/08/2011 21:17:27
2356 forum posts
47 photos
Looking great so far Roy, nice job!
 
JD
Steve Withnell22/08/2011 21:49:00
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858 forum posts
215 photos
Very nice Roy - are you "going for glo or all the way to electronic ignition?
wheeltapper23/08/2011 10:13:35
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424 forum posts
98 photos
It's going to be glowplug, I cant be having with all these electronical thingies.
 
Lets face it, It'll only run the once ( if it runs at all that is ) then it'll go on a nice stand .
I'm only making it to see if I can.
 
Roy
jomac23/08/2011 11:31:18
113 forum posts

Hi. nice work, Is the crank shaft one piece, or fabricated in sections. Show us a photo when its running. Im'e making a DA 1cc engine, only have to make the carby, also just have to finish making the furnace to cast the crankcases, then its finished.

John Holloway

Clive Hartland23/08/2011 15:00:30
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2929 forum posts
41 photos
I wonder if there would be interest in the model engineer fraternity for a project to make an engine from stock bar and square ally?
Something easily machined and minimum set ups, fabricated crankshaft etc.
Some of the designs I have seen are out dated and look old fashioned.
Has anyone any good designs to offer?
 
Clive
wheeltapper23/08/2011 17:22:44
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424 forum posts
98 photos
Hi Jobac, just saw your question.
 
the crankshaft is three parts, the web is pressed onto the shaft with the help of some shaftlock and 3 screws tapped into the end on the join line.
 
then the pin is pressed in, also with shaftlock, although the amount of force it needed to get it in I doubt it'll ever move.
 
Roy
JasonB23/08/2011 18:35:20
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25215 forum posts
3105 photos
1 articles
Posted by Clive Hartland on 23/08/2011 15:00:30:
I wonder if there would be interest in the model engineer fraternity for a project to make an engine from stock bar and square ally?
Something easily machined and minimum set ups, fabricated crankshaft etc.
Some of the designs I have seen are out dated and look old fashioned.
Has anyone any good designs to offer?
 
Clive
 
Have you looked at the latest ME (4411) ? Our own Ramon Wilson is writing up his ED racers, made from a bit of square ally
 
 
Dave Parkes also did one a couple of months ago and there have been a few others
 
MEB are running the Humbug design at the moment, very simple and fits the criteria you suggest. They have a lot of other desin=gns in their back issues as well.
 
J

Edited By JasonB on 23/08/2011 18:44:32

Roderick Jenkins23/08/2011 19:02:10
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2376 forum posts
800 photos
How's this? A 10cc four stroke side valve which I designed and made some years ago. The drawings and words are mostly done but I want to make sure that the drawings are right, which really means making it again and taking pictures.
 
Rod
 
David Clark 124/08/2011 08:32:46
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3357 forum posts
112 photos
10 articles
Hi Rod
I would be interested in an article for Model Engineer.
regards David
 
ady24/08/2011 09:55:13
612 forum posts
50 photos
I wonder if there would be interest in the model engineer fraternity for a project to make an engine from stock bar and square ally?
 
The model aeroplane engine fraternity have quite a few models which can be built directly from barstock.
 
The EZE engine series for example.


Edited By ady on 24/08/2011 09:57:33

Johan van Zanten25/08/2011 14:02:47
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52 forum posts
98 photos
Hi all,
 
I would be very interested in such a side valve engine project.
It 's something new under the sun.
 
Regards, Johan van Zanten.
wheeltapper25/08/2011 14:09:07
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424 forum posts
98 photos
HI
If I could have my post back for a moment
I've finished the piston.


piston rings next, cast iron, yucky job .
 
Roy

Ramon Wilson25/08/2011 15:28:23
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1655 forum posts
617 photos
Posted by wheeltapper on 22/08/2011 19:03:15:
HI
I decided a while ago to 'try' and build this engine.
(My accentuation)

Roy, from what I see you are doing an excellent job so far. Keep up the good work both in the workshop and on here.
 
You haven't said whether this is your own design or not nor what it's capacity is. Can you enlighten us.
 
Regards - Ramon
JasonB25/08/2011 16:44:55
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25215 forum posts
3105 photos
1 articles
"You haven't said whether this is your own design or not nor what it's capacity is. Can you enlighten us."
 
There is a clue in the title of the thread as to the capacity
 
One of the late Malcom Stride's (AKA Nemett) designs who wrote IC Topics in ME for several years.
 
J
wheeltapper25/08/2011 17:54:43
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424 forum posts
98 photos
Thanks Jason
 
Roy
Ramon Wilson25/08/2011 19:48:21
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1655 forum posts
617 photos
Oh Dear, yes, thanks Jason
 
Red face all round - ear to ruddy ear I guess I was too focussed on the pics and text Is that a reasonable excuse?
 
Still think you're doing a fine job though Roy
 
Regards - Ramon
 
 
wheeltapper30/08/2011 13:09:06
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424 forum posts
98 photos
HI
more progress.
from these,

to this,




the cell is AA for comparison.
 
cheers
Roy
jomac30/08/2011 14:47:47
113 forum posts

Clive Hi. If you go to the model engine news site, and others, there are quite a few engines that are made from bar stock, (when I learn how to put photos on the site), you will see the Bolearo 18 that I made, from bar stock. You can see other engines from around the world of the same type on this site. Because Im'e a member I have access to a lot of other engines plans, that are well drawn and very detailed, in this site you can also see detailed instructions and machining. Yes, I know that some are old design, and some newer, but as Ramon will testify ??? it a good site, Anyway even if some are older, they are joy and some times tedious to build and run.

John Holloway.

Ramon Wilson30/08/2011 16:17:06
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1655 forum posts
617 photos
Hi John (H) and Clive - yep 100% testify to that.
Only has one fault and it's a big one as far as I'm concerned - it's so informative and vast you can spend hours nay days enjoying oneself to the total detriment of getting anything done in the workshop .
 
Have you run the Bolaero yet John? Took the Eta's to our Nats this weekend - pleased to say they were well received. They are running well now just over 8000 on a 12 x 5. Smaller props next time
Apologies to Roy for encroaching his thread
 
Regards - Ramon
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