The Saga Continues

 

In a time way before anything interesting happened a dinosaur ate a tree!

Now thats got that out the way where was i?.... god only knows, another day down and closer to the weekend... what little weekend i'm going to get this week! It turns out one of the customers we work for had contracted out 3 heat exchanger cores to a company in the midlands somewhere, they then proceeded to sit on them for 3 weeks and not touch them at all. So eventually the company took there jobs back and duly dropped them off at our door first thing this morning ( which is better than 7 o'clock last night which is what they were promising)... Anyway, To cut the long story short, they want all 3 done by Monday. Each core is roughly 36 hrs machining and there is only 25 hrs of "work" between now and Monday morning, so lookie who gets to spend an entire day at work Saturday .... yup muggings here!

well enough of the stresses and strains of the random existance i lead back to more important matters

Errrrrmmmm... i think i left off at eccentric straps, 

anyways whilst i was off machining new straps i left Mr F in charge of the rod ends as the old rods were bolted sideways through the strap which left no way of adjustment. So i made some drawings and sent Mr F off to produce some new ends






Having chopped and soldered the rods, and bolted them to the new straps the result was rather pleasing!














Whilst we were at the stage of taking the whole lot to bits we decided 1 hole from the valve chamber to each end of the cylinder was asking a bit much so Mr F got the cylinders up and put 2 more in.. just to be sure!

after that the re-bore and new holes it was time to look at the valve face...... hmmmm oh dear!






.. Wave my magic wand and.......











Ohhh look its all better! 10 thou skimmed off the face got all the pitting out and back to a good solid face.. so next was obviously the valves....

Oh Winsons... what have you done?!?!

Well.... I spent a few hours back when we first got the pug trawling the internet. Strange as it may seem most of the Winson pug's have gone missing into the depths of people houses never to be seen again it would appear! I spent an eternity looking through pictures of dogs, or cars, or any random crap but L&Y pugs.. also there is very little written about them anywhere i have found.. One thing that turned up was a e-mail conversation between 2 people talking about one such loco, one seemed to think it was "a nightmare to set up" and the other saying that he couldn't seem to get it right ..... well news for both of you, whoever you are.... of-course it wont work ... the valves are just wrong .. there is no other way to put it! In most engines the exhaust cavity in the valve is line on line ( or there abouts)  with the 2 steam ports to the piston. Meaning as soon as the valve moves either way one or the other port will be opened to the exhaust cavity and port. WELL!.. Winsons apparently decided to make up their own rules here and as it turned out the valve had to move .0625" (or 1.6mm for all you metric lovers) before it would close one of the steam ports to the exhaust cavity! Yup in the mid position both steam ports were open to the exhaust!! so this means the valve also had to move a fair distance before it input any steam... forget lead and lap basically it never got much chance to put steam into the piston as as soon as it did before it had chance to do any work it would throw it all up the funnel! So new valves then!!


well .... not quite. we managed to silver solder a lump of phosphor bronze onto the bottom of the

valve and machine it square, then the cross in the valve top which houses the connection was made deeper to allow it to run properly,  and re- assembled to check clearances it ends up looking something like this

all shiny and new!!!!! .. Ish! 

 once the valve gear goes back together and the throw can be measured we can then draw up the valves and chests and hopefully come to some form of conclusion on how big these valves should be and how big the exhaust cavity should be and maby we can have ourselves a runner!!!

In other news 

the weekend just gone saw us both out in the workshop for a full day and a half, so various things got done, all the main rods and con rods were re-bushed, cross-head slides amended and new cross-heads made up new die blocks and the expansion links fettled up means that that's all working as it should do now,

Well this has been a mouth full, i think its time for a cup of tea and to turn the music up a bit and have a bit of a well earned rest with some AC/DC to make the evening roll on nicely, 

seens as im not far off caught up with the progress i may have to come back later and get the last bits out the way but this is enough for now!

Rock n' Roll!!