Author Topic: Pipe and Bolt Engine Mod-Up (Read 190940 times)

vtsteam · « **Reply #150 on:** January 28, 2015, 09:11:58 PM »

The head underneath, before drilling and cleaning up:

vtsteam · « **Reply #151 on:** January 28, 2015, 09:20:57 PM »

I drilled back through the lower holes as guides, and through the upper piece with the tap drill.

When all fastening holes were drilled, I flipped the piece right side up and drilled back down the tap size holes with the clearance size drill.

This sequence allowed me to maintain the head in perfect alignment with the pre-drilled tap drill holes in the cylinder, as well as the valve and bore holes.

vtsteam · « **Reply #152 on:** January 28, 2015, 09:28:20 PM »

A test fit of the head -- I had placed the head on top of the cylinder while tapping, to use the clearance holes as guides to keep the tap square. It all went easily:

RussellT · « **Reply #153 on:** January 29, 2015, 04:50:51 PM »

It's coming on well!

Russell

vtsteam · « **Reply #154 on:** January 29, 2015, 05:56:29 PM »

Thanks Russell!

Today I chucked a 3/8" pipe plug in the 3 jaw and turned off the square end:

vtsteam · « **Reply #155 on:** January 29, 2015, 05:58:09 PM »

Then reversed it in the chuck and turned off the threads:

vtsteam · « **Reply #156 on:** January 29, 2015, 05:59:37 PM »

Parted it off short:

vtsteam · « **Reply #157 on:** January 29, 2015, 06:01:18 PM »

Drilled it to suit the nail crankshaft:

vtsteam · « **Reply #158 on:** January 29, 2015, 06:06:01 PM »

Began filing a cam profile with a coarse file. To give 110 degrees on inlet, I needed the minimum cam thickness to be 0.539" on the 0.713 blank.

I got it to withn 2 thou with the coarse file, and then finished with a fine file. Then I drilled and tapped the boss for a 5-40 set screw.

vtsteam · « **Reply #159 on:** January 29, 2015, 06:08:16 PM »

And mounted it on the engine:

Manxmodder · « **Reply #160 on:** January 29, 2015, 09:22:55 PM »

Steve, that is really coming together nicely,I'm very impressed.

Russel,top job you've done there,and as others have said I really like the novel features you've designed into this engine. And it runs!

....OZ.

RussellT · « **Reply #161 on:** January 30, 2015, 02:30:53 PM »

Thanks Oz.

Steve.

Russell

vtsteam · « **Reply #162 on:** January 30, 2015, 04:34:31 PM »

Thanks Oz!

Today I cut some short sections of pipe, and nother pipe plug. Ground the corners of the plug before chucking in the lathe:

vtsteam · « **Reply #163 on:** January 30, 2015, 04:41:05 PM »

Plug corners turned off, and slight rduction in thread diameter:

vtsteam · « **Reply #164 on:** January 30, 2015, 04:42:05 PM »

Nested everything together on a firebrick:

vtsteam · « **Reply #165 on:** January 30, 2015, 04:43:21 PM »

And brazed them together:

vtsteam · « **Reply #166 on:** January 30, 2015, 04:45:25 PM »

Cleaned the whole thing up on the lathe and drilled a center hole to suit the nail crank:

vtsteam · « **Reply #167 on:** January 30, 2015, 04:47:58 PM »

Installed a set screw, and mounted a new flywheel on the engine:

RussellT · « **Reply #168 on:** January 31, 2015, 12:39:31 PM »

I've done a bit more to my wobbler after showing the video of the parts crudely mounted. I think it's now more or less finished.

I've made a frame to hold the parts using a bit of pipe and some six inch nails. A blob of weld holds them together. The axle for the flywheel is another bit of 6 inch nail with a glazing sprig (a small wedge shaped nail used for retaining glass before putty) through a hole in the end to retain the flywheel. That goes through the pipe and is welded on the back.

The ports were filed square and filed so that the inlet and exhaust opened and closed together at TDC and BDC. The square edges also make the ports open more effectively. That made it run much better.

Another chunk of six inch nail drilled on the lathe was used for the inlet pipe and that was silver soldered in place using my last half inch of silver solder.

A bolt was used to retain the bearing/valve/nut and fastened on the back with a nut.

Here's a picture showing how it looks now.

I can't make up my mind whether or not to paint it. What does anyone think?

I'll do another video showing it running in this state in a day or two.

Russell

vtsteam · « **Reply #169 on:** January 31, 2015, 12:58:35 PM »

ps, I like yours without paint, Russell. but I'm sure it would look good either way.

shipto · « **Reply #170 on:** January 31, 2015, 03:50:10 PM »

I just realised we only have 2 weeks to finish

all VTsteams fault fancy doing this during the cold months

Aaaaaanyway I spent a bit of time today on the fly wheel and piston which I decided to remake as I wasnt happy with the first one.
I started off by thinking about the framework that everything will sit on and made a start on that and then fixed the piston end position, I left it very long as I am not exactly sure how I am going to fix it.
A little bit of the bar...erm I mean homemade bolt that I totally made before cutting it down again to make this

was turned for the piston end before pressing it onto a short length of chromed tube and then constructed the outer tube. I am much happier with the new piston.
I am going to have to put some hours in after work if I want to have a hope of finishing this in time

especially since I dont have a complete plan, so pray for warmer weather.

vtsteam · « **Reply #171 on:** January 31, 2015, 06:10:11 PM »

Progress!!!

SwarfnStuff · « **Reply #172 on:** January 31, 2015, 08:43:12 PM »

Russell, I am waiting to see this running painted or not. It looks good. One of the members of my local club has recently bought himself a small plating kit so if it were his I am sure he would add some Bling and nickle plate some or all of it. (Fairly new toy for him, so plating is all the go at present.) Great job
John B

shipto · « **Reply #173 on:** February 01, 2015, 12:53:34 PM »

Got some kinda independant movement out of it just need to work out the valve to run it properly.

vtsteam · « **Reply #174 on:** February 01, 2015, 01:29:15 PM »

Hey another running engine!!

Seems quite fast, too!. What's the mechanism???

ps. If you have to turn your computer sideways to see it run, does that make it a horizontal?

Congratulations Shipto -- that came along a lot quicker than I thought...

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Author Topic: Pipe and Bolt Engine Mod-Up (Read 190940 times)