Farm Boy Hit and Miss engine

[Dalboy]

A simple job completed and that is to prepare the blanks for gear cutting, I need to do a little reading on the dividing head to cut the teeth.

One of them is steel and the other bronze they also need to be spot on for the diameter as well as the centre hole size.

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[Dalboy]

Started to set up for cutting the gears, but things needed doing first. Starting with an arbor for the gear cutter. Then discovered that my milling machine clamps were to large to hold the rotary table in the vertical position (It also acts like a dividing head) so two clamps were made luckily I could use the T nuts and the threaded rods.

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Finally managed to get set up as can be seen.

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And even better managed to complete the larger of the gears. Now that I have completed my first go at a gear I feel more confident to do others as and when needed

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[Dr.Al]

Looking good. I find gear making incredibly satisfying.

[CHJ]

Looking good. I find gear making incredibly satisfying.

It’s so many years * since I last cut one, I’m afraid I would have to get the reference books out to refresh my D.H. theory let alone go through all the trepidation of wondering if I’d got the Tooth PCD etc. correct.

Would be like going back to the days of being scrutinised on the running fit of a fixed centre gear chain. (those are just a trial fit, honest!)


* Just worked it out must have been about 64/65 years ago.

[Dalboy]

Looking good. I find gear making incredibly satisfying.

It’s so many years * since I last cut one, I’m afraid I would have to get the reference books out to refresh my D.H. theory let alone go through all the trepidation of wondering if I’d got the Tooth PCD etc. correct.

Would be like going back to the days of being scrutinised on the running fit of a fixed centre gear chain. (those are just a trial fit, honest!)


* Just worked it out must have been about 64/65 years ago.

Luckily for me they give the diameter of the gear blank as well as the tooth count and the cutters to use as well as the depth of cut. I do have a book on gear cutting which I am reading.

Anyway I have now managed to do the second gear and this one I am very pleased with it just seemed to go better.

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[Malc2098]

Wow!

[Dalboy]

Just a couple of small parts made over the last couple of days. I did waste over an hour looking for my 1/4" collet which seemed to disappear into thin air, workshop gremlins at work to only find it right in front of my eyes sitting on the lathe why it should be there as I last used it on the milling machine.

Anyway the two parts which enabled me to test the gears on the frame(rubbish video but you get the right idea) a bit awkward using one hand as I was steadying the camera with the other

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Video HERE

[Dalboy]

Turned the main body but left it on the main stock as there are other things that need doing to it that require the extra material to hold it.

After the turning I made the two arms followed by cutting a couple of slots in the turned part, still need to drill two holes that is why it is still set up in the milling machine touch wood that will be tomorrows job followed by turning a couple of pins ready to silver solder the arms in the slots that will be another thing that I have never done before I am alright soft soldering.

Arms only resting in place to show how they go. Milling cutter is set on centre ready for tomorrow

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[CHJ]

Best of luck with a new experience.

Silver soldering is one of those simple functions that are very satisfying when completed.

Biggest problem on an item like that is getting the heat into the large heat soak of the body so that you get an instant wicking of the solder when you touch it to the fluxed joint.

I have a little hearth of fire bricks and some flame resistant/heat reflecting fibre tiles.
I often position a slave gas torch to provide 'soak heat' on the bulk of the item and use working torch to control the joint area final temp.

[Dalboy]

Best of luck with a new experience.

Silver soldering is one of those simple functions that are very satisfying when completed.

Biggest problem on an item like that is getting the heat into the large heat soak of the body so that you get an instant wicking of the solder when you touch it to the fluxed joint.

I have a little hearth of fire bricks and some flame resistant/heat reflecting fibre tiles.
I often position a slave gas torch to provide 'soak heat' on the bulk of the item and use working torch to control the joint area final temp.

I do have a small hearth knowing that at some time I would need one. It will take quite a bit of heat in the main body of this assembly I may cut it shorter leaving enough to remount it on the lathe later. This will hopefully help with the soldering. The slots called for a 0.128 width so I went in straight away with a o.125 cutter as quite often that will cut over size very slightly and there does seem to be enough room for the solder to wick in to the joint

[CHJ]

......
I do have a small hearth knowing that at some time I would need one. It will take quite a bit of heat in the main body of this assembly I may cut it shorter leaving enough to remount it on the lathe later. This will hopefully help with the soldering. .....

At least you won't have to get as much heat into it as I did with these Tool Rests shown in UKW thread from 2020

[Dalboy]

The governor parts pile has some more parts added to it all small parts but seem to take ages to do even if they are simple still some more to make. I have not yet soldered any parts as there are a few more that need hardening so will do the soldering and hardening all at the same time weather permitting as it is raining here.
The brass pins with the thread on the left are 1/8" diameter to give an indication of size the split pins that will be used on the silver steel pins are 1/32" to fit in the tiny holes

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[Dalboy]

I have managed to do some more between having to buy and set up a new compter as well as getting the car passed a MOT.

Any way a few more parts some for the Govenor assembly and some for the exhaust valve assembly.


Govenor partts

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Exhaust push rod assembly

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The govenor assembly operates the exhaust assembly once all completed as well as the ignition system.

A general view of both assemblies some need to be silver soldere together I will ddo them in a batch that is why they are still in pieces to give an idea of sizze the two brass balls are 5/8" dianeter

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The box is slowly filling up with parts this stops bits from going missing while working on other parts

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[Malc2098]

New computer set up, car Mot'd and more bits, Christmas has come early!

Nice.

[Andyp]

The new computer’s spell checker is not working


I’ve little idea of what half those bits do Derek. How far off are you from assembly?

[Dalboy]

New computer set up, car Mot'd and more bits, Christmas has come early!

Nice.

The computer is a joint present for me and the wife from ourselves. The car did not need anything doing to it not bad for a 25+year old/

The new computer’s spell checker is not working

I’ve little idea of what half those bits do Derek. How far off are you from assembly?

That was me with the spelling and missed the underlined mispelled words.

Still a few bits to make yet the main ones being the two flywheels that need turning and the fuel mixer assembly.

Then I need to sort out the ignition system, base board and fuel tank.

I may be able to do a small assembly soon but then strip back down to paint.