Potty Popcorn Engine

[sbwhart]

Dragged myself into the shop today and finished off the bits and bobs for the governor:-

Turned up the jocky wheels and crank shaft pully. No pics

Then made the fly ball arms, I used mild steel

Squared up a block and first drilled the pivot hole 1mm and the corner holes.



Then with a milling cutter milled one side deep enough to make the two arms, then swiveled the vice round, and milled the angled bit.



Then split them off with a slitting saw.



Spent a little time filing them to fit, and filed the end into a rough round then run a M2 die down it.

Drilled and tapped the balls



I took delivery of some 3mm dia o ring cord this morning that I'm going to use for the drive belt, so time for another hows it going to look shot.



Stew

[Stilldrillin]

Ohh, my.....    

David D

[saw]

 

[Bernd]

Oh my.        

[sbwhart]

Thanks:- Dave/Saw/Bernd

Ok with my bigger watermark now in place.

Made the manifold.

Started with a bit of brass bar, turn it down to size and part off.



Then drill and tap one end marked the tap up so i wouldn't go in too deep.



Turned it round and did the same to the other end and also thread the OD 3/8*32 ME.

Then mark out where the holes are to go, then in the spin-indexer drill the holes 3mm for the couplings, also milled a small flat on the hole position so the coupling would have something to sit square against for soldering.



Turned up the coupling with a little 3mm  nipple on the end 3mm for a tight fit in the manifold.



Couplings pressed in.



Onto the silver soldering just added a little bit of flux, and a few nuggets of solder and heated them up to everything melted in, then into the pickle for 1/2 hr.

Back onto the spinindexer, square up onto one of the coupling pick the hole centres up and drill.





Wilst it was in the pickle made the stop valve nut.

Her it all is



Stew

[saw]

Nice work. 
 
After silverloading what are you using to clean the material 

[sbwhart]

hi Benni

I'm using a Citric acid solution, its used in baking you can get it from suppermarkets, it comes as a powder and you just add it to water to make a strong solution.

Stew

[saw]

Thank you (it's Citronsyrelösning in Swedish), I will try that next time. 

[Rob.Wilson]

Hi Stew .


The governor looks spot on ,,,,,a cracking bit of machining 

I see you managed to fined O ring cord 


  are you sure they are your photos   


Rob 

[sbwhart]

I see you managed to fined O ring cord 

Yes Rob thanks for putting me onto it:- less than £2 for a meter including postage on flea bay.

 

Stew

[sbwhart]

Finished off most of the fittings for the manifold.

To make the body for the whistle valve just square up a chunk of brass and put a small centre where the coupling will be turned.



Then using the good old wobble bar get it on centre in the four jaw chuck

Turn and thread 1/4*40 and drill through 2mm and part off

Over onto the mill and mill a 3/16 slot across it.



Drill a 1mm hole for the lever pin



The lever is made from some 3/16 square mild steel bar, so in the self centering four jaw with the compound slewed over a couple of degrees turn up a nice shaped handle, and part off.



Drill a 1mm hole for the pivot pin.

Next bit the valve spindle, from a bit of 8mm dia stainless, centre drill and with a running centre turn and thread.



Flip it round and turn and thread the other end again using a running centre, to turn the cone I used a small fixed steady that I made some time ago it just clamps on the running centre.



These are the bits



and assembled



Cheers
 

Stew

[doubleboost]

Hi
Stew
Some nice detail work
I like that steady

[Bernd]

I like that little steady rest too. Nice idea.  I'll have to copy it, if it's ok by you Stew?

And very nice work on those little detail items. I need to learn patients to do that. 

Bernd

[saw]

Nice build, I just love your'e small fixed steady 

[arnoldb]

Great going Stew  - lovely work on the detail  .

  I love that steady too - so simple!

 , Arnold

[sbwhart]

Thanks for all your kind comments guys. that little steady I saw some ware and though that's a good idea, so when the need arose I made one, and glad I did.

Next bit up is the union coupling of the manifold to the steam chest, this had to be a naval type coupling otherwise the darn thing wouldn't screw together. The bits were just straight forward machining.

Her they are the little round mushroom bit screws into the square body through the nut its fixed in place with stud lock, tightening the nut onto the union on the manifold tightens onto it an make the seal, hope that made sense 



Also made the oiler as I won't be running on steam its not a proper displacement oiler just a look a like, to use just unscrew the cap put a few drops of oil in screw the cap on tight, turn the air on and it will flush the oil into the cylinders.

Her's a pic of it all assembled onto the engine.



Starting to look a bit tasty.

Waiting for some 12mm dia thin wall brass tube to be delivered for the wistle, that will be the next bit.

Stew

[saw]

You're photos is so fine now that I think you can use it as a Christmas card 

[Doc]

That is some amazing work Stew simply beautiful!
I really love the looks of that flywheel!

Very very nice Stew keep up the good work!

[Stilldrillin]

I can understand your union coupling....... 

I don't understand how you manage to do the rest of it. Gorgeous! 



(No, not you Stew...... The engine)! 

David D

[Doc]

I can understand your union coupling....... 

I don't understand how you manage to do the rest of it. Gorgeous! 



(No, not you Stew...... The engine)! 

David D

Phaaaa ha ha ha

[Bernd]

I can understand your union coupling....... 

I don't understand how you manage to do the rest of it. Gorgeous! 



(No, not you Stew...... The engine)! 

David D

We need an emticon that shows "mind in the gutter".            

I know mine was.   

Bernd

[NickG]

Well done Stew, love your steady from the tailstock, I've always wondered how people turn small bar without it flexing ... always get a taper on it, now I know! 

[sbwhart]

Thanks for your interest and support chaps.

Got a little done yesterday, I'm rapidly getting to the point with the build when its all about bling.

Made the stop valve handle out of a bit of broom handle, I just hope the boss doesn't notice.

Turned it up in the lathe and recessed it to take  dime, I'll glue it in at final assembly.

This us what it look like.



Stew

[Bernd]

Now I know were that dime went that I lost.      

Nice work Stew. That'll be one pretty engine once it's all "blinged up".

Bernd

[sbwhart]

Thanks Bernd

Our daughter brought the dime back from her resent visit to the west coast, I asked her to bring back some us change just for this just job, taking a closer look at it I realized that each state has a different design on the tail side of the coin, some of them a very nice indeed.

Well I've more or less done all the machining work now, its just down to assembling the pulley for the governor and giving it a trial, then it down to some serious bling work.

Last job making the whistle, not much to show in terms of machine set ups most of it was basic stuff and file work, I followed LBSC instruction for making a loco whistle he was very insistent about getting the shape of the throat correct and the disc slot, it came out fine I get a nice sharp note, that set the dogs howling in the area, I was a bit concerned that it would come with a D flatulent note

 





Her's a few pics of the whistle fitted, I won't post any more pics of the engine now until its all blinged up.

Stew