Something seriously amiss here. You have a 3-cylinder engine, which should give 6 exhaust beats per revolution of the driving wheels; but when you finish up I can only hear 4. That is very odd, almost as if the centre cylinder is disconnected. I am fascinated to know what the answer is.
@@jimmynswgr I couldn’t really tell you, I haven’t had the steam chest covers off so am just working on what I have at the moment. One day I may get around to having a better look and really interrogating the design of it all, try to increase the movement at the lifting links etc. for now I’ll just be happy if it runs ok. It used to thump at the exhaust like it was fighting itself, sounded nice but wasn’t very efficient, so I’m hoping now it will be a bit smoother but won’t know until I can get it to the track.
@@TomsWorkshop42 it’s pain that you can’t see what the valves are doing. I have never been a fan of setting timing by air and not being able to see where the valve is in relation to the ports. Could be worthwhile attaching a bit of hose to the cylinder drains and putting them in a bucket of water so you can have even more definitive indication of when you are getting admission. Anyways, you’re a smart cookie. I am sure you will sort it all out.
I always wonder why model engineers always call setting the valves, "setting the timing". Which I've always thought is a motor vehicle term for setting points etc. ???
Good job mate❤
WOW ............. ABO and 👍 from:
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Something seriously amiss here. You have a 3-cylinder engine, which should give 6 exhaust beats per revolution of the driving wheels; but when you finish up I can only hear 4. That is very odd, almost as if the centre cylinder is disconnected. I am fascinated to know what the answer is.
Interesting, and informative, thanks Tom.
Have you checked if the die blocks are hitting the bottom of the expansion link? That may explain the bumpy part of the stroke.
No, it’s not, they probably only move about half way down the links.
@@TomsWorkshop42 really? That is interesting. What is cut off in full gear? 75%?
@@jimmynswgr I couldn’t really tell you, I haven’t had the steam chest covers off so am just working on what I have at the moment. One day I may get around to having a better look and really interrogating the design of it all, try to increase the movement at the lifting links etc. for now I’ll just be happy if it runs ok. It used to thump at the exhaust like it was fighting itself, sounded nice but wasn’t very efficient, so I’m hoping now it will be a bit smoother but won’t know until I can get it to the track.
@@TomsWorkshop42 it’s pain that you can’t see what the valves are doing. I have never been a fan of setting timing by air and not being able to see where the valve is in relation to the ports. Could be worthwhile attaching a bit of hose to the cylinder drains and putting them in a bucket of water so you can have even more definitive indication of when you are getting admission. Anyways, you’re a smart cookie. I am sure you will sort it all out.
Good video Tom always a pain valve timing but at least you are getting there with it glen 👍🏻👍🏻
I always wonder why model engineers always call setting the valves, "setting the timing". Which I've always thought is a motor vehicle term for setting points etc.
???
Good vlog Tom I'm sure you will get it spot on in the end!!
It’s all in the algorithm Tom!
Boring? Certainly not 😊
what loco is the duke based on?
Gresley proposed 4-8-2, effectively an elongated A3.
@@TomsWorkshop42 Yeah right, thanks for that.