Stuart S50

[crueby]

Much nicer looking.   

[Roger B]

Excellent work    Shame about the chilled casting  but that seems to be a risk. Apparently they can sometimes be annealed  I do agree that studs are much more full size practice.

[propforward]

Great work as usual. Amazing how much difference using studs makes - just looks a whole let better.

[samc88]

Thanks for the comments 

More done tonight, I finished off the front cylinder cover and drilled the steam chest 7BA holes for the studs. Very happy with how this has come out, engine has plenty of compression and piston moves nicely. Only annoyance is i seem to be missing a steam chest stud which Ill make if the original doesnt turn up

[samc88]

Had a pleasant evening machining the crosshead from a piece of 1/2" square brass.

First thing was to machine the height down in the mill before putting in the 4 jaw chuck in the lathe to turn the spigot and tap it 5BA. Once that was done i returned the part to the mill and drilled the cross hole with a 3/32 drill for the crosshead pin.

Next I machined the step down either side before finally milling the slot in the centre to take the connecting rod. Pretty pleased with how this one turned out

[propforward]

Nice work! Good to see this progressing along.

[samc88]

Had an enjoyable day in the shed making the conrod. The bit of flat bar in the kit was a bit scabby so I made this from 1/2" steel bar.

First op was to mill the flats, I really need to invest in a collet block. I used 2 clamps as a stop to ensure the flats were all at the same spot and a square to line everything up which worked really well.

Once that was done the centre was taken down to 1/4" before the tailstock was offset to turn the taper down to 3/16". To set the tailstock square again I used a blade between the 2 centres.

After the turning was complete the holes were drilled before then filing the radius by hand.

Ive gone a little different from the as drawn engine by including a phosphor bronze bush which will require a slightly modified crankpin which will be the next job.

[samc88]

Some progress has been made, not as much as I'd like due to needing a new headgasket on the land rover.

Crankpin has been made as has the crosshead pin, guide rails and supports. Happily its still turning over freely even with all the extra bits fitted

[propforward]

That's excellent - very nice work on that con rod. That engine is looking really good, I think it will make a very nice running engine.

[samc88]

That's excellent - very nice work on that con rod. That engine is looking really good, I think it will make a very nice running engine.

Thanks Stuart, I think I'll tackle the steam chest next, looking forward to doing some soldering practice. Really looking forward to hooking the compressor up to it, cant resist spinning it over by hand now bits are connected!

[propforward]

Absolutely - I know that feeling. How does it feel when you turn it over by hand? Probably pretty smooth looking at the quality of the parts made.

[samc88]

Absolutely - I know that feeling. How does it feel when you turn it over by hand? Probably pretty smooth looking at the quality of the parts made.

It spins over really nicely with one finger, theres also plenty of compression when i put my finger over the steam ports so fingers crossed it should run okay. Ill try and do a vid when im in there next to show it turning over, I always forget

[propforward]

Brilliant, that's exciting, that is going to be a great engine.

[samc88]

As requested Stuart heres a video I put on youtube earlier [youtube1]https://youtu.be/JGt6xE-56RM[/youtube1]

[crueby]

Looking good!!