Sows ear

[metalmad]

Hi Tel
Dk really likes to use his drills doesent he
on the first one I started, I used the wrong drill and wondered "I Thought there would be more clearance then that " :
Glad to see you have got back to it mate
if you had just given me another week or so I might have beaten you to it :big:
Pete

 

[tel]

Ah well, all is not lost, tomorrow I'll silver solder a block onto it and re-cut that end. Just annoying.

You might well still beat me - I've got no further with the ignition to date.

 

[metalmad]

Today I started the Yoke, but was unable to finish as the 4mm piece of spagetti, I was using for the slots in the ears, was wandering around so much that I decided to put it aside, until i get a good quality Bit.

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[metalmad]

I had to work today but I got an hour or so in on the Yoke
here is a pic of the Engage and Disengage position.
But at this stage, very much a work in progress.
Pete

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[metalmad]

I was able to get a few hours in on the "Sow" today roughing in the rocker and trying some springs that I know will be far too heavy
Pete

 

[Brian Rupnow]

I ended up making my own governor springs based on someone elses "how to" article and they worked great. I used 0.010 diameter guitar strings for music wire. The process of spring winding is so simple I was amazed that I hadn't learned to do it years ago. I simply couldn't find any pre made springs that would work for me.----Brian see post #836
http://www.homemodelenginemachinist.com/index.php?topic=10831.msg137492#msg137492 I also found that in order to get my engine to cycle properly, I had to remove the spring from the push rod (which is clearly seen in the above picture) and depend entirely on the compression spring on the exhaust valve to do all the work of making the cam follower ride the cam.

 

[metalmad]

Hi Brian
I think, I will get it running with the heavy springs installed in order to remove the governor from the problem.
Then after (or if ) it runs I will make some springs, but im not looking forward to it ;D
it depends on how much work, I get,last week I was snowed under but if I get an easy week, I hope to get the head done too.
Pete

 

[bearcar1]

I'm rooting for you Pete. So far it all looks like a fine job on your parts and they all seem to fit together without a lot of fiddling to get them to play fair in the sandbox with each other. Don't be nervous about making the springs, if you have to. The worst thing that could happen is they do not act accordingly and the only thing lost would be the time spent and not so much material. You'll do just fine their mate. :bow:

BC1
Jim

 

[metalmad]

Hi Jim
Thanks for the support,some days I feel I need it ;D
"they all seem to fit together without a lot of fiddling to get them to play fair in the sandbox with each other"
you did see the length of my push rod right :big:
I think I will start on the exhaust valve today, in order to get a better understanding of the push rod length.
Pete

 

[metalmad]

Hi all
had some shed time today and drilled the exhaust and intake ports.
In pic one is the reason its called the Sows Ear.
real ugly :big:
I may mill that flat at a latter date but for the moment its on the bottom of the head, and my growing list of remakes.(eg flywheel etc)
and I gotta find a lump of wood too.
Pete

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[metalmad]

some more pics

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[Brian Rupnow]

Loving it!!! You will be running by next week. It seems Tel has either slowed down or ran into a problem with his Kerzel build. I am so looking foreward to seeing one of you guys with a runner.----brian

 

[tel]

Yeah, I'm hung up on the ignition, need some bits and the shekels are running low! Pete's will overtake me very soon at this rate.

Meanwhile, I'm 'amusing' myself with the mechanical components for an EDM.

 

[metalmad]

Hi Brian
Thank you very much for your support,It means a great deal to me as I know you have first hand, detailed knowledge of the Kerzel and its unique set of problems :big:

Hi Tel
I know an EDM is tempting mate ,but a days work and yours is a goer :bow:
its easy to get sidetracked I know ,Ive been looking at my next project for a while now :
Pete

 

[Brian Rupnow]

Actually, I think that 95% of any "problems" encountered are more a matter of my machining abilities than inherrent flaws with the Kerzel itself. The engine fought me every step of the way, but that kind of thing has to happen just because of the stack up of the "law of averages". I have built 10 steam engines and one I.C. engine before I got to the Kerzel, and never had any real problems with any of them. I can't really judge, as I have only built one other I.C. engine, but probably the Kerzel plans are the equal of any other small engine plans "out there". I have an old set of Hamilton Upshurs's plans, and they don't look to be any better than Kerzels. I am really happy to see that MetalButcher has his first Upshur engine running, and I am looking foreward to your and Tels engines as well.----Brian

 

[metalmad]

Hi Brian
What really attracted me to the Kerzel, is that it offers a plan that deals with everything from the plug to the gears and points, and should the builder wish,not much more than a coil and a bit of common sense is needed,and its FREE too. :bow:
That being said I must admit, I modified mine a little in that I made my bobbin with a 4 mm center to give plenty of room for the lockout leaver.
(I'm afraid I'm not much of a machinist eather :big
Pete

 

[metalmad]

I think I jinxed myself with my last post
I misread the sheet on my first valve and made it an inch long instead of 1.2
I rushed through the second and its fine but I'm still annoyed with myself and will remake the other tomorrow.
Pete


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[bearcar1]

Well now that is certainly a bite. Pete, I think that you are doing a bang up job on this engine so far, and can hardly wait to see it in a running condition. You could always make another 'flawed' valve, make up a couple of wire bails out of silver wire, and present them as fine jewelry to old what's her name as an anniversary or wedding gift ??? Naw, better not mate, the dog would not enjoy having to share his abode with you much. Rof}

I do also admire you having built the tank into the base and am anxious to see how that fairs out for you.

Good day

BC1
Jim

 

[metalmad]

Hi Jim
I'm learning a lot from doing this engine and that includes locking up the head on the mill,although I still forget sometimes.
Don't worry about the Dog mate,we had to move it out years ago to make room for me.
Here are some pics of another model with a Tank under the engine, that I saw where I buy my supplies

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[metalmad]

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