Hello KNO3.The video link that I give above shows the best I can get.
Just notice that there is no power loss when turning sharply .
To increase the speed , I need to increase the pressure over 2.5b, and fully open up the steam valve to the engine. The effect will be ; bigger steam consumption with more RPM and ….. increase of the bow wave , so more water resistance! This is where the problem stands!!) .
At he end , I’ll have a negligeable gain of speed but a bigger steam consumption. The faster we go , the bigger the bow wave is and the gain is nil ! Marine engineers as familiar with this problem. There is a critical speed that we cannot go over in our available range of power.
But as long as the boiler pressure remains steady and the speed look realistic , that fits me well!
Before Manfred came out with this new boiler, he had two types of boilers on his catalogue.
The small ones to feed Lily’s and Piccolo’s type engines = +/- 2 cc to 4 cc , and single & double burners(pic below) ones for the Neptune engine = 11cc and above.
When he died, they stopped the production of the big boilers as there was probably not enough demand .
Now , when we compare the « Kessel Maxi » (like mine) and the « Kessel compact » you can see that the difference in size of the furnace is the double on the « Maxi ».
https://www.regner-dampftechnik.com/dampfkesselWithout entering into calculations, the heated surface (estimated = 1.70 dm2) is much more larger than the « Compact » ’s one , and , obviously produces much more steam .
The Compact boilers are good for Piccolo types engine ( +/- 4cc) , so the « Maxi" is far more than suitable for a 3cc engine ! (
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May be good to calculate how it behaves with the new Neptune = +/-11cc I know only two suppliers manufacturing BRASS boilers ; REGNER & SAÏTO
All the others are COPPER made. If anyone can tell me why , I would appreciate.
(I do not consider Mamod, Wilesco and similar lwo pressure vessels which are quite different of what we work with)
If I may say so, Regner overheats the steam out of the boiler by passing through the furnace. The engine steam inlet then , temp is far above what it is needed for an « honnest » overheated saturated steam .
Too hot steam may bring some problems on O’rings, lack of lubrication, and as I’ve seen it, melting tin soldered connections.
I do not like the flare touching the steam line. A couple of loops inside the chimney is more than enough to overheat the steam by some °C.
Best regards.