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Your Own Design / Re: Big stroke 55 cc one cylinder ICE
« Last post by AlexS on Today at 03:39:52 PM »
Thank you Thomas! I appreciate it.
Your Own Design / Re: Big stroke 55 cc one cylinder ICE
« Last post by AlexS on Today at 03:39:01 PM »
Time to make some tools! A mounting block for fixing a three claw on the index table. The indextable is mainly used for milling the cams.

The three-claw is fixed with the 3 original bolts of my lathe. Given that you can only mount bolts on one side. Did I use three imbus bolts as centering on the indextable side. In addition, the whole is mounted by means of a threaded rod that you tighten through the middle.

The whole has done a nice job. However, the span was large. For the milling of the cams it was advisable to also manufacture a countercenter. This naturally resulted in fewer vibrations.
I like to make some useful tools.

Tomorrow I would upload some more pics about the progress. I'm going to attend a performance by a school friend's band (Four Days Marches Nijmegen) ;)
Your Own Design / Re: By Jupiter
« Last post by Vixen on Today at 03:38:23 PM »
Thanks Guys,

Not much progress to report other than making and fitting the exhaust heater pipe and flanges, which runs from side to side in the Induction Manifold. It's purpose was to heat up the fuel/ air mixture by ducting some of the exhaust gasses through the pipe. This was done to prevent icing at high altitudes.

I have been distracted by an extensive modification program on my Emco VMC100 mill. I have been fitting new motors and controllers and new spindle bearings.


Your Own Design / Re: Big stroke 55 cc one cylinder ICE
« Last post by Ye-Ole Steam Dude on Today at 03:37:33 PM »
Hi AlexS,

Beautiful design engine, will follow along.

Have a great day,
Engine Ancillaries / Re: Commander Lubricator
« Last post by Jo on Today at 03:28:38 PM »
Thanks Zee  :),

If you look at the second joint you will see it is dull and has a cratered surface - that is the silver over heating. Like with soft soldering a dull joint can tell you it is possibly a dry joint but for a lubricator tank that is not a concern.

How are you finding retirement now that you have had a few months practise?

Your Own Design / Re: Big stroke 55 cc one cylinder ICE
« Last post by AlexS on Today at 03:21:36 PM »
In the month of March the components were made for the rocker arm / camshaft assembly.

The first series of images are the assembly and adjustment blocks of the tumblers. Now the valve clearance can be adjusted per valve. The axes on which the tumblers rotate are currently glued(locktite 402). But this can be replaced by a threaded rod by mounting both blocks. The valve stem lengths are almost identical. And the valve stem caps can be adjusted to the play (added later).

The tumblers are equipped with rollers. These are admittedly of softer steel than the silver-steel cams. For now the use of ball bearing grease for lubrication is sufficient.
From Kits/Castings / Re: Textile Mill Diorama
« Last post by J.L. on Today at 03:15:29 PM »
Hi Chris,

Yes, here is a shot showing the setup using that longer 1/8" center drill. A 1/8" collet chuck in the quill of the mill/drilling machine was used instead of a drill chuck.

Now the holes can be opened up to whatever size.

From Kits/Castings / Re: Textile Mill Diorama
« Last post by crueby on Today at 02:54:50 PM »
Neat, didn't know they made the narrow ones that long, should work well.

From Plans / Re: Zee Needs Popcorn
« Last post by crueby on Today at 02:52:41 PM »
When annealing the brass, the color reached is the guide. Do it in dimmer lighting or it does not show well. Heat till the area being done is a dull red, and you are done. You dont need to keep it hot for a long time, and cooling slow or quenching makes no difference to the results in brass or copper.

What may have been the issue: With that thick a bar, it will work harden again during the bend pretty quickly, so you need to bend till you feel it stiffen up, then reanneal it again for more bending distance. When doing boiler end caps in thinner copper, it can take half a dozen cycles.
From Plans / Re: Zee Needs Popcorn
« Last post by zeeprogrammer on Today at 02:45:01 PM »
Those are short and thick pieces to bend, so it's easy to understand the difficulty.

Just to clarify...I wasn't trying to bend them when they were that short.
However, you do point out one of the mistakes I think I made.
I was using a long rod. The idea being to thread an end, anneal it, bend it, cut it off, then do the next spoke.
So when I was trying to anneal the end I was going to bend, the rest of the rod was a heat sink.
I should have cut blanks, maybe 3 inches long, thread, anneal, and bend.

Although, as I mentioned, threading first left me too little rod to clamp onto. Or there may have been another way.

@Stuart - I didn't know one could anneal aluminum. I'll have to remember that (and the trick).
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