Thanks Arnold, Vince, Jason, Dave O, Jo, Simon, Hugh, Don, Kim and David D for your comments and input. I have to say that it took quite a leap of faith to polish that crankcase but now it's done I'm glad I did as it is quite different to the usual finish.
Vince - I thought I might hear from someone else in sunny Malta
but I should've known better - no chance . I can hear the excuses now
- Hope you're having a good holiday Chris and Gill
Jo - You must have missed it - it's a yachty thing for the coming few weeks then a restart on the steam launch. Engine wise haven't thought too much about it - I have some c'cases underway for a couple more '5's and then there's that Bentley I'd like to consider but I do want to make another steam engine too. It's all to far ahead to make any definite plans at the moment though
Wout, My stick and tissue free flight days are long gone but I have many memories and still have a couple of rubber powered models up the loft. I gave all my indoor stuff away a year or so back but still have an awful lot of FF materials though - balsa, tissue rubber etc - theres just not enough hours in the day for every thing
Well to get this back on track guys
I've had a good and basically uneventful session running both engines this morning and am very pleased with the results given the kind of engines they are.
Never intended as anything else but a machining project, to see and hear them run though is always a bonus
.
I think those jets could in actual fact be a tad smaller - maybe .2 -.25 mm as they still appear to run quite rich. The contra pistons are rather tight but I'll leave them as is at least for now as they will not get run that often and to remove them means a complete strip down.
You'll notice in the video the 'red head' version is rocking slightly - it's not a loose mount but rather the backplate loose and the rocking limited by the locking screw. That front housing was installed after that initial run using some Rocol pipe sealant used on the boiler. This appears to have cured the overtightening so the backplate has now been fitted the same - hopefully that will hold as well. I noticed as the 'blue head' was running that the front housing gradually tightened itself over centre so that's now been treated the same. One thing noticed compared to all the other engines made was just how hot the whole engine was - whether that's down to that mount blanking some airflow around the case as Jo was thinking I'm not sure - nothing serious just noticeably hotter when removing them afterwards.
Anyway heres a short vid of the two engines. I've spent most of the day getting to grips with a free download movie editor - this is my first attempt so no 'grimacing'
That 'sluffing' noise you can hear as it's being flicked is
not the piston slapping around in the bore
- that's actually coming from the intake.
Well that really is the end of the line - hope you all enjoyed it.
Now there's engines to clean and put away and a workshop to clean too before getting to grips with that yacht stuff.
Back soon - Ramon.
