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Nice challenge! Another angle: when the speed of the vessel is limited by the hull friction, reduce the friction by discharging the used propellant along the hull, as done with torpedoes. Good luck & keep us informed! Mike

Hi Tony, Thanks for the very useful pictures. Once I'll get a lathe again I'll certainly use them! Some remarks: at the first (?) page you refrain from the use of cross tubes because of turbulence, however heat transport improves with turbulence. I would advise to make the crosstubes out of...

I wouldn't use aluminium (which conducts heat pretty good). Better use something which does not conduct heat, such as heat resistant plastics (e.g. the stuff they use to make electric circuit boards). In my design of small scale (gauge 1) steam locomotives I try to "increase :D" thermal...

Hello all, recently I recieved some some tracks (45 mm, LGB). The sleepers are more or less ok, however the brass of the rail itself turned black. In an attemt to remove the oxidation, I put the rail in a mixture of vinagar and hot water. The result can be seen at the photo: the black color is...

Many thanks (again) for all the answers & helpful replies !! Because there are lots of variables and unknowns (turbulence in T section, dimensions of T section, flow obstruction of cross tubes etc.) I intend to make a rig to test the flue with T section. I just started by making a new poker...

@ Arnold: Thanks for the answer! From the mind (not at home right now, so I can't check) 10 mm was at the edge of what's possible from the point of the prototype... That's the reason Jason! @ GWRdriver: Indeed, a T shaped flue will result in turbulence. The reason I'm using it is that I feed...

Hi guys, To start: many thanks for the responses ! What I forgot to mention is the intended working pressure, which is just below 3 bar (or 43 psi). @ Arnold: The soldering will be a bear, but not the grizzly you're expecting. Copper T sections are available (copper tubes for water). I was...

Hey there, Currently, I'm designing my first gas fired, live steam locomotive for use on 45 mm track (1/22.5 scale). From my previous build, the “home made Dacre” I've learned that a lot of the energy generated by the poker burner is wasted (or used to remove the paint from the smokebox door ;D...

Hi all, after reading this board for a while I took the plunge and registered. From my very early childhood I'm passionate about technology and steam locomotives in particular. Currently I'm an engineering student. Unfortunately almost every part of my study is theoretical, so I decided to...