Author Topic: Potty Simpson and Shipton Short Stroke Engine (Read 92553 times)

Stilldrillin · « **Reply #75 on:** March 09, 2012, 02:36:09 PM »

"Job Done".

The whole job done blummin well, Stew!

I've been trying to educate my pal in Scotland...... How to deal with flywheel castings which are larger than the chuck. By gripping on the rim recess.

He needs to see this. Thanks for showing!

David D

Rob.Wilson · « **Reply #76 on:** March 09, 2012, 04:32:00 PM »

how nice is that there engine looking

Stew

Cracking job

Rob

sbwhart · « **Reply #77 on:** March 09, 2012, 04:53:08 PM »

Thanks for your comments Guys

I'ts amazing how you get an image in your mind of how you want an engine to look, and the boost you get when that image starts to become reality.

I was planning of having three columns on each side but decided that the short side only needed two,

I also ran out of square bar

Some nice brass acorn nuts holding the columns in place will help set it all off.

Stew

doubleboost · « **Reply #78 on:** March 09, 2012, 05:11:06 PM »

Work of art Stew

It really looks the dogs nutts

I cant wait to see it running
John

Fredbare · « **Reply #79 on:** March 09, 2012, 05:40:22 PM »

Just brilliant, and so informative, thank you.

John

sbwhart · « **Reply #80 on:** March 18, 2012, 12:59:06 PM »

Thanks John and John

Things have been real slow on this build over the last week due to domestic duties.

One of those duties was solving the aviane housing problem in Glasgow where our son is moving into a new/old house, with a big garden, he asked if i could make him some bird nest boxes, yes I said, he proptly ran through a list of boxes with diferent hole sizes, and shapes, plus a box for Bats and a block of flats for sparrows.

This is the score minus the sparrow tower I ran out of wood for that, which I will buy at B and Q on their old git discount day.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1570.jpg

Potty Simpson and Shipton Short Stroke Engine

Made some acorn nuts for the engine, ground a form tool up to form the dome.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1573.jpg

Potty Simpson and Shipton Short Stroke Engine

This how they look on the engine.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1576.jpg

Potty Simpson and Shipton Short Stroke Engine

Then made a start on the bearing housing, I'm going to try and emulate Jason, and Ramon's method using JB weld. First square up to size a chunk of ally, then run a 3mm rad down each edge.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1579.jpg

Potty Simpson and Shipton Short Stroke Engine

Cut off and skim them off to all the same length, then rough drill the hole for the bearing.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1581.jpg

Potty Simpson and Shipton Short Stroke Engine

Drill through M2.5 tapping.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1582.jpg

Potty Simpson and Shipton Short Stroke Engine

Her desaster struck

I broke the drill and failed to get it out, tried nocking it out from the other side it moved a bit then i got the punch stuck, so gave it up as a bad job I'll just have to make another, in fact this may not be a bad thing as the flywheel bearing could do with being a bit wider.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1584.jpg

Potty Simpson and Shipton Short Stroke Engine

Cut the caps off with a slitting saw.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1585.jpg

Potty Simpson and Shipton Short Stroke Engine

Tap M2.5 and bolt them together, and then giving the scrws a bit of support pass a 11mm end mill vertically down through to form the bearing bed.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1588.jpg

Potty Simpson and Shipton Short Stroke Engine

Now for the bases as before clean up and square the ally to size, cut them off and mill to the same length.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1589.jpg

Potty Simpson and Shipton Short Stroke Engine

Then using the sine bar angle the edge of the base.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1590.jpg

Potty Simpson and Shipton Short Stroke Engine

This is what they look like so far, the main bits needs sortening to get the centre height so they will look more in proportion.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1594.jpg

Potty Simpson and Shipton Short Stroke Engine

The next couple of weeks will be slow weeks as well which is a bit frustrating as there isn't that much to do to the engine.

Stew

Jasonb · « **Reply #81 on:** March 18, 2012, 01:11:00 PM »

Oh Stew you could have done better than those elongated dome nuts, surely some nice pineapple nuts would have been more appropriate

Bearing Blocks look good.

J

doubleboost · « **Reply #82 on:** March 18, 2012, 06:15:30 PM »

Hi
Stew
That bird box 3 from the left one of the nails looks to be about .001 out of line

The bearing blocke are up to your usuall standard

John

Stilldrillin · « **Reply #83 on:** March 19, 2012, 03:04:54 AM »

It ALL looks good to me.......

David D

saw · « **Reply #84 on:** March 19, 2012, 06:30:42 AM »

Nice

arnoldb · « **Reply #85 on:** March 19, 2012, 02:08:01 PM »

Great going Stew

- I like the finishing touches you're adding.

, Arnold

sbwhart · « **Reply #86 on:** March 20, 2012, 03:23:46 PM »

Thanks for your interest chaps

Quote

Oh Stew you could have done better than those elongated dome nuts, surely some nice pineapple nuts would have been more appropriate

I've no idea what pineapple nuts look like:- did a little research, are they like an upside down acron nut with a flared top

For those of you who don't know what a sine bar look like hers mine:

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1601.jpg

Potty Simpson and Shipton Short Stroke Engine

The bar is made to a very accurate length between the rollers and you just pack one end up to give the desired angle, that you calculate using the sine function.

Finished off the base by drilling the holes, the outer holes were countersunk flat bottom to take the bolting pads and the centre hole for countersunk for the cap screws.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/IMG_0666.jpg

Potty Simpson and Shipton Short Stroke Engine

Then turned up the pads.

And the bearings.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1602.jpg

Potty Simpson and Shipton Short Stroke Engine

I like to push the reamer through with a centre with a drive carrier, that way it floats and you cut a true size.

This is how it all assembles together.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1605.jpg

Potty Simpson and Shipton Short Stroke Engine

Then stuck the lot together with JB weld gave it 24 hrs to cure then cleaned them up.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1612.jpg

Potty Simpson and Shipton Short Stroke Engine

Now they look good:- a big thanks to Jason and Ramon for sharing the method its one I will use again in future.

One more bit made the drive half shaft. I was going to make it from 12mm bar, but didn't have any so used 15mm and turned it down to 12mm with an 8mm step for the fly wheel threaded M8

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1606.jpg

Potty Simpson and Shipton Short Stroke Engine

Stew

sbwhart · « **Reply #87 on:** March 28, 2012, 08:54:59 AM »

Managed to sneak a couple of hours in the shop this morning thanks to my grandson, the little darling had been playing with my bed side clock and put it forward 1 1/2 Hrs so bright and early I was up at my usual time, it was only when I looked at my shop clock that I noticed how early it was

Made the fly wheel drive for this I needed at 36mm dia * 10mm slice of mild steel I hadn't got any bar but I did have some 1/2" thick *
1 1/2" steel bar, so I cut of a 1 1/2" length put a centre drilled the middle and then used a friction drive to turn it into a disc.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1626.jpg

Potty Simpson and Shipton Short Stroke Engine

Then skimed the faces up.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1628.jpg

Potty Simpson and Shipton Short Stroke Engine

Set it up central on the mill and put a 12mm off set and drilled 9mm

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1632.jpg

Potty Simpson and Shipton Short Stroke Engine

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1631.jpg

Potty Simpson and Shipton Short Stroke Engine

Then drilled and reamed 12mm through the middle

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1634.jpg

Potty Simpson and Shipton Short Stroke Engine

Drilled and tapped M3 for a fixing grub screw.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1635.jpg

Potty Simpson and Shipton Short Stroke Engine

Then made a 6mm bush for the crank drive and pressed and pressed it into the disc.

Time for a few hows it looking shots.

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1638.jpg

Potty Simpson and Shipton Short Stroke Engine

http://i431.photobucket.com/albums/qq32/sbwhart/Potty%20Simpson%20and%20Shipton%20Short%20Stroke%20Engine/131_1637.jpg

Potty Simpson and Shipton Short Stroke Engine

Stew

Stilldrillin · « **Reply #88 on:** March 29, 2012, 02:24:44 AM »

How's it looking, Stew?
It's looking as though it's shaping up very well. As usual!

Grandkids.... Love em! Despite the chaos, mess, and fingerprints.

Your Dixon type toolpost, in the reaming pic, Stew. What's the 1/4" empty hole for?

(I'm just fitting one to my lathe)........

David D

sbwhart · « **Reply #89 on:** March 29, 2012, 04:51:07 AM »

Quote

Your Dixon type toolpost, in the reaming pic, Stew. What's the 1/4" empty hole for?
(I'm just fitting one to my lathe)........

Don't know

Its never got in the way of anything:- I supose every hole has to be some ware

Stew

Deko · « **Reply #90 on:** March 29, 2012, 05:11:12 AM »

David, I got one of those holes in my toolpost as well,

came free with the toolpost,but never used it, and would sell it if i could get it out.

Cheers Dek

Stilldrillin · « **Reply #91 on:** March 29, 2012, 05:41:49 AM »

Stew, Dek.
Don't like to see holes, even free ones, with no obvious purpose.

So, I made an anti rotation/ location, screw in widget, for mine.........

http://i110.photobucket.com/albums/n95/Dayjo/After%202012/P1020154.jpg

Potty Simpson and Shipton Short Stroke Engine

David D

lordedmond · « **Reply #92 on:** March 29, 2012, 07:17:06 AM »

david

they were in the dikson ones and I believe they were for a indexing arrangement but as with all things when the are reproduced they just do it with no thought ,

Stuart

AdeV · « **Reply #93 on:** March 29, 2012, 08:37:19 AM »

Holy smokes, Stew, that's just amazing. Resembles a wedding-cake, perhaps you could sneak it past the better half as such?

Also, a HUGE thank you for showing all the build steps, I learn so much from your posts. One Q about the filing buttons; do you harden them? Or do you just rely on stopping when you start scratching them? And can you give me an idea of how long it took, roughly, to file down the ends of the crosshead bar? I tend to get bored with filing after about 3 minutes, so if it's a 4 hour job, for example, I'd be looking to do it on the rotary table...

Meanwhile, have one of these:

sbwhart · « **Reply #94 on:** March 29, 2012, 09:05:34 AM »

Ade

I tend to keep the buttons soft, and use them as a one off, some people do harden them, then the file skids over them, I prefer just to scratch the surface of the soft ones if you have more than one rad to do you can usualy give them a part turn so that you've got a clean untouched bit of button to use, to do the cross head i would say 10 min max.

Hope this helps

Stew

sbwhart · « **Reply #95 on:** March 29, 2012, 12:37:25 PM »

Quote from: Stilldrillin on March 29, 2012, 05:41:49 AM

Stew, Dek.
Don't like to see holes, even free ones, with no obvious purpose.

So, I made an anti rotation/ location, screw in widget, for mine.........

Potty Simpson and Shipton Short Stroke Engine

David D

On the whole I thinks thats a good use of that hole Dave

Stew

Stilldrillin · « **Reply #96 on:** March 29, 2012, 02:30:02 PM »

Thanks Stew!

I don't like to see holes, just standing around, idle. Gotta find 'em something to do.......

With two precise location points, I can't see the massive torque of my mini lathe disturbing this toolpost's setting!

David D

sbwhart · « **Reply #97 on:** April 11, 2012, 08:14:29 AM »

Things have been real slow on this engine due to family commitments but have managed to steal an hour or two her and their.
I had to do a major sculpturing job on the base, it was my own fault instead of following the drawing I changes the hole centres for the pedestal as i thought they would make thing look more symmetrical, but I forgot about the impact on the length of the crank.

Any way with that sorted I've I spent some time getting my head around setting the timing:- not easy as you can't get at anything.

But I have had it running for short time, but it will only run with lots of oil in the cylinder, I think I have to reduce the clearance of the piston, which will be a major strip down, but the positive thing is that It will run, as soon as I get a longer run out of it I'll post a video.

Stew

arnoldb · « **Reply #98 on:** April 12, 2012, 02:00:49 PM »

Have a coconut Stew

Looking forward to some photos and a video

, Arnold

Stilldrillin · « **Reply #99 on:** April 12, 2012, 03:58:23 PM »

Running! Did you say RUNNING?

Short time/ lots of oil. Who cares! It's still a runner! That's great news!

Blummin, well done Stew!

Looking forward to the endurance run video......

David D

News:

Author Topic: Potty Simpson and Shipton Short Stroke Engine (Read 92553 times)

Rob.Wilson

lordedmond