Small point - overfilling boiler can lead to hydraulic locking in cylinders. Re condensation, leave throttle valve cracked open and the reverser at the front whilst raising steam. This will hopefully warm the cylinders up pre run, and the open reverser will allow condensate to escape. On the real thing they would have cracked open the throttle and opened the draincocks.
Sam [EMAIL PROTECTED] wrote: > After polishing with 400 and 1500 grit wet/dry, and then cleaning, the > cylinder went right back together in the reverse order, as predicted by Tony > and Sam. A compressed air test with the engine reassembled now showed that > the other cylinder was leaking air past the o-ring. The engine ran better, > but still not smoothly. > > Since the tools were all out on the workbench, I went ahead and disassembled > the other cylinder. It wasn't full of debris, but it needed polishing. > Within 2 hours it was back together with a new o-ring. > > On air the engine would start up and run smoothly. The cylinder action was a > bit tight but smooth. Under steam yesterday, however, things were not great. > > The boiler raised steam in 5 minutes, and intitially the engine seemed like > it wanted to run. But then it got very stiff and would not turn a full > rotation, almost like there was severe priming. (Also the first cylinder's > head leaked steam, although the head was fully seated and straight.) This > continued until I shut the fire down. Subsequently it ran again for an hour > on air down to 10 psi just fine. > > Causes? Possibly insufficient steam volume. Possibly the o-rings are still > too tight and the piston's expansion with heat makes them tighter. Possibly > priming. > > I will try it under steam again before tearing into the cylinders again. > Maybe rig up a superheater to dry the steam a bit before it goes to the > engine. > > Steve _______________________________________________ SSLiveSteam mailing list Send messages: [email protected] Cancel subscription: http://postfix.45mm.com/mailman/listinfo/sslivesteam Rules: http://www.45mm.com/sslivesteam_guide.html
