Thanks Guys...Its Done

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Thanks Guys...Its Done

04-26-2008

Re: Thanks Guys...Its Done

Re: Thanks Guys...Its Done

Re: Thanks Guys...Its Done

Re: Thanks Guys...Its Done

Re: Thanks Guys...Its Done

Re: Thanks Guys...Its Done

Re: Thanks Guys...Its Done

Re: Thanks Guys...Its Done

Posted by Steve on April 27, 2008, 2:07 pm

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>
> looks a good job for a first project and finished just in time for the
> start of his next series on the inline twin ;)
>
> If I recall its a 15cc engine, head is about 60mm diameter to give an
> idea of size and the series was in Model Engineer. I was considering it
> as a second job to do while I'm making my 2" Fowler TE but will probably
> go for the V twin 'Hoglet'
> (http://www.pbase.com/captain_carl/image/67722872) that was in Model
> engine Builder mag, bit more to see going on.
>
> Jason
>
>
> --
> jasonballamy
> ------------------------------------------------------------------------
> jasonballamy's Profile: http://www.rcgroups.com/forums/member.php?u=203943
> View this thread: http://www.rcgroups.com/forums/showthread.php?t=855635
>

That's the one - just published a video of it running:

http://www.btinternet.com/~steve.withnell/lathe/Nemett/nemrun.wmv

Hopefully this works, it fires up in Mediaplayer for me, doesn't mean it
will for amyone else!

Another nice V-twin is the "Vega" which I've be thinking about. No
intention of building the inline twin Nemett not on the plan at all. I
will take a look at the hoglet though.

Pretty certain a steam engine is next. Partly because I've got all the bits
and there is a bit of history to it.

Steve

Posted by Steve on April 27, 2008, 12:23 pm

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> Finally, I've finished my attempt at building Malcolm Stride's Nemett15S.
> Never really made anything significant before, but Malcolm's article was
> that detailed I thought it was worth a shot. It fired up and ran tonight a
> bit of fiddling left to do with the carb, but it works.
>
> I didn't stretch to spark ignition but left it as a glow - motor. It's not
> exhibition standard, there are a few careless mistakes, but still pretty
> pleased with it.
>
> Here are the pics of the finished engine:
>
>

www.btinternet.com/~steve.withnell/lathe/Nemett/nem2.JPGwww.btinternet.com/~steve.withnell/lathe/Nemett/nem3.JPG

>
> The files are big <2M.
>
> So almost exactly two years to complete, I'll write down what I learned
> that wasn't in the books when I get chance.
>
> Anyway, big thanks to John, Peter(s), Dave, Tony, Keith and everyone else
> that provide help along the way and of course "Nemett" for an excellent
> constructional article.
>
> Oh and a question - anybody know where I can get a copy of the magazine
> article with Bruce Satra's valve lapping tool?
>
> Thanks Guys
>
> Steve

Well done Steve a superb job that you should be very pleased with.
Looks as if it could be useful in hauling about something of a
reasonable size as well. Where was the article from? I've obviously
missed it and it looks the sort of size (larger) that I could attempt
as I could at least see most of it.

Excellent first major project Steve and it runs as well, no stopping
you now. Ashamed to report that my own first attempt at a 1.5cc diesel
only produced a couple of "putts" and very sore fingers - attacking it
with the electric starter just produced a bent conrod but I did have
the excuse that I was young and impatient at the time - just much
older now nothing else has changed. :-) Congratulations a fine and
impressive achievment, now will you make it work or is it into the
glass case for showing?

Regards

Keith

It is Model Engineer running every other issue from May 2006, which is when
I started it. So all that advice on setting up collet chucks did actually
deliver! Many thanks Keith.

I've now got this running consistently, and this afternoon it started
"first flick" but it does need an electric start, which if you get a
hydraulic lock will cause serious dmage as you found out!

I've now got some video clips which need editting down to web sizes so will
get those up as soon as I make some time.

I did wonder about building one of those big vintage cabin wing RC planes,
but I'm kidding myself to think I can make the time at the minute!

Now I have a broad feel for my lathe and it's had some serious use, next
task is a full tune up and to add a digital scale to the tailstock,
counting turns on a handwheel with the lathe running at c3000rpm with a
0.7mm drill bit in the chuck and trying to get to a 17.5 mm deep straight
hole is something I can do without! I have the bits to add a rev counter to
the spindle without too much effort, but JS advises the effort doesn't
really pay back. So I might just calibrate the speed knob.

Once I've tuned up the lathe and mill, I plan to re-build great grandad's
steam engine. I've enough bit's to do a rebuild and it shouldn't require as
much effort as this motor did. It's pretty big, about 5 inch stroke x
1/3-4 bore, single cylinder horizontal engine.

Steve

Posted by on April 27, 2008, 12:54 pm

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>
> It is Model Engineer running every other issue from May 2006, =A0which is =

when

> I started it. =A0 So all that advice on setting up collet chucks did actua=

lly

> deliver! Many thanks Keith.
>
> I've now got this running consistently, =A0and this afternoon it started
> "first flick" =A0but it does need an electric start, =A0which if you get a=

> hydraulic lock will cause serious dmage as you found out!
>
> I've now got some video clips which need editting down to web sizes so wil=

l

> get those up as soon as I make some time.
>
> I did wonder about building one of those big vintage cabin wing RC planes,=

> but I'm kidding myself to think I can make the time at the minute!
>
> Now I have a broad feel for my lathe and it's had some serious use, =A0nex=

t

> task is a full tune up and to add a digital scale to the tailstock,
> counting turns on a handwheel with the lathe running at c3000rpm with a
> 0.7mm drill bit in the chuck and trying to get to a 17.5 mm deep straight
> hole is something I can do without! =A0I have the bits to add a rev counte=

r to

> the spindle without too much effort, =A0but JS advises the effort doesn't
> really pay back. =A0So I might just calibrate the speed knob.
>
> Once I've tuned up the lathe and mill, =A0I plan to re-build great grandad=

's

> steam engine. =A0I've enough bit's to do a rebuild and it shouldn't requir=

e as

> much effort as this motor did. =A0It's pretty big, =A0about 5 inch stroke =

x

> 1/3-4 bore, =A0single cylinder horizontal engine.
>
> Steve- Hide quoted text -
>
> - Show quoted text -

Thanks Steve, I'll think I have a couple of issues from that time so
I'll have a look. You are right a big old Piper Cub or something would
look and sound just right. Now if I could just find the time to finish
that time machine I could get all of these planned projects finished;
the one issue with this hobby is there is never enough time but always
too many things to make and mend.

I have thought about a spindle tacho as well but have came to the same
conclusion as JS (wise old owl), suitable cutting speeds are normally
within quite a wide range and we often change them anyway to suit the
circumstance so absolute accuracy is not really essential. On my
Myford I borrowed one of those cheap digital rpm gauges and calibrated
(in the loosest sense) my rpm pot. Although I marked it at the highest
speed belt position I also did it with the drive belts in all possible
speeds and made up a chart for future reference. To be honest I have
only ever run the machine with the belt on the high speed setting
since but I'm sure I could find the chart if needs be :-))

Look forward to seeing and hearing the video

Best regards

Keith

Posted by Steve on April 27, 2008, 2:10 pm

Please log in for more thread options

>
> It is Model Engineer running every other issue from May 2006, which is
> when
> I started it. So all that advice on setting up collet chucks did actually
> deliver! Many thanks Keith.
>
> I've now got this running consistently, and this afternoon it started
> "first flick" but it does need an electric start, which if you get a
> hydraulic lock will cause serious dmage as you found out!
>
> I've now got some video clips which need editting down to web sizes so
> will
> get those up as soon as I make some time.
>
> I did wonder about building one of those big vintage cabin wing RC planes,
> but I'm kidding myself to think I can make the time at the minute!
>
> Now I have a broad feel for my lathe and it's had some serious use, next
> task is a full tune up and to add a digital scale to the tailstock,
> counting turns on a handwheel with the lathe running at c3000rpm with a
> 0.7mm drill bit in the chuck and trying to get to a 17.5 mm deep straight
> hole is something I can do without! I have the bits to add a rev counter
> to
> the spindle without too much effort, but JS advises the effort doesn't
> really pay back. So I might just calibrate the speed knob.
>
> Once I've tuned up the lathe and mill, I plan to re-build great grandad's
> steam engine. I've enough bit's to do a rebuild and it shouldn't require
> as
> much effort as this motor did. It's pretty big, about 5 inch stroke x
> 1/3-4 bore, single cylinder horizontal engine.
>
> Steve- Hide quoted text -
>
> - Show quoted text -

Thanks Steve, I'll think I have a couple of issues from that time so
I'll have a look. You are right a big old Piper Cub or something would
look and sound just right. Now if I could just find the time to finish
that time machine I could get all of these planned projects finished;
the one issue with this hobby is there is never enough time but always
too many things to make and mend.

I have thought about a spindle tacho as well but have came to the same
conclusion as JS (wise old owl), suitable cutting speeds are normally
within quite a wide range and we often change them anyway to suit the
circumstance so absolute accuracy is not really essential. On my
Myford I borrowed one of those cheap digital rpm gauges and calibrated
(in the loosest sense) my rpm pot. Although I marked it at the highest
speed belt position I also did it with the drive belts in all possible
speeds and made up a chart for future reference. To be honest I have
only ever run the machine with the belt on the high speed setting
since but I'm sure I could find the chart if needs be :-))

Look forward to seeing and hearing the video

Best regards

Keith

Here it is -

http://www.btinternet.com/~steve.withnell/lathe/Nemett/nemrun.wmv

I've got the tacho head installed, so I just need to plug in a frequency
counter to do the calibration. I've only two belt ratio's so a dual
calibration on the knob should work for me without needing a chart.

Regards

Steve

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