Joe Burgard
Member
I was able to get some of those great drawings of Britannic's engines and I have been using them to get dimensions of the various parts. It takes a while to do.
I plan on doing a Diagram of Volumes for the engine. In order to do this I need the 4 inputs:
1. Cylinder Dimensions (Sam's article)
2. Positions of Crank (Sam's article)
3. Clearance and Receiver Volumes (trying to find from drawings)
4. Steam Distribution (will have to make an educated guess, like 66% cut off for the HP cylinder)
So far I've found the receiver volumes (roughly). The pipes were easy to dimension, but inside the valve chests and the valves themselves are much less accurate.
HP to IP cylinder R1=1.9*volume of HP cylinder
IP to LP cylinders R2=3.1*volume of IP cylinder
These values roughly correspond to the guidelines set in "Marine Engines and Boilers" on page 27. HP to IP receiver 1.8-3.8*volume of HP cylinder. IP to LP receiver 1.3-2.3*volume of IP cylinder.
Next to roughly figure the clearance volumes...
Joe
I plan on doing a Diagram of Volumes for the engine. In order to do this I need the 4 inputs:
1. Cylinder Dimensions (Sam's article)
2. Positions of Crank (Sam's article)
3. Clearance and Receiver Volumes (trying to find from drawings)
4. Steam Distribution (will have to make an educated guess, like 66% cut off for the HP cylinder)
So far I've found the receiver volumes (roughly). The pipes were easy to dimension, but inside the valve chests and the valves themselves are much less accurate.
HP to IP cylinder R1=1.9*volume of HP cylinder
IP to LP cylinders R2=3.1*volume of IP cylinder
These values roughly correspond to the guidelines set in "Marine Engines and Boilers" on page 27. HP to IP receiver 1.8-3.8*volume of HP cylinder. IP to LP receiver 1.3-2.3*volume of IP cylinder.
Next to roughly figure the clearance volumes...
Joe