In connection with the K-27 DRGW engines announced by PSC/MMI, I noticed that they will come in two types, either with inboard cylinders (e.g. #456, #461) or with outboard cylinders (e.g. #459, #463). It is not clear to me what the difference is in this case. Looking at pictures I have, there are no obvious differences. But then, I don't have pictures of all engines from both sides. Is there someone who can help? Thanks in advance!
Robert , do you have a photo or link to one? I don't know what an inboard cylinder is. Inboard, or inside the frame valve gear and probably valves, yes, but the cylinders are outboard.
I think they were compound (three cyl) out of the box then converted to two cyl later. Ine inboard cyl is hard to see.
Been doing some looking around. They might mean the location piston valve. Through time and the various K's, the valve was slanted inboard, outboard or straight up.
Yes, that's what it must be. Sometimes it's strange, one tries to write down the question and this starts to activate one's own brain. Because when I went back this morning to look at those same pictures I mentioned in my first posting, it was immediately clear to me that there were two different kinds how the upper one of the "cylinders" is placed. In some of the engines (e.g. #454, #461) they are slanted towards the engine, and in others (e.g. #455, #463) they slant outwards. Thus looking from up front, on some engines the two groups of cylinders form a V-shape, on others an inverted one. Then there are some where there is a box instead of the upper cylinder. These are always on older pictures. That must thus be an older version as these engines were rebuilt during the course of their "life". The box type is what is also found in the C-19, C-21 and C-25s, i.e. in the predecessors. Well, it seems, nevertheless, that my question was not that stupid as I felt after my own discovery of the now obvious answer. Thanks everybody. And let's try to keep those surviving K's running.
There are pictures on http://www.drgw.org/data/steam/roster/drgw03.htm It seems, by the way, that this variation is only found on the K-27s. The later types all have the V-shape, judging from the pictures I have immediately available. The new PSC/MMI models in On3/On30 will all come with the outboard cylinders. But the H0n3 models have been announced in both versions. [ 06. February 2005, 19:48: Message edited by: swissboy ]
I think they were all (K27's) built with slide valves. Following is a list of the K27's from 1930 on. --------------------- Slide Valve (Square Box) 450 451 460 ******** Outboard slanted cylinder 452 453 455 459 462 463 464 ******** Inboard slanted cylinder 454 456 458 461 ********
Great, thank you so much Jim. I am not that familiar with the specific terminology, not even in German (my maternal language).
I see what you are asking, now. I posted this question on another site, asking why some valve cylinders were offset inboard while others are outboard of the Piston cylinder. Must be some sort of a dog-leg in the valve gear for the inboard ones, eh? The outboard ones make sense for outside valve gear, as the eccentric crank is outboard of the plane of the main rod.
Hehe, I thought you guys talked about boat engines...... I got an outboard engine from 1912....... One cylinder 500cm3 and twostroke. No valves, just ports. Just one electric wire to the plug......
Man a half litre two stroke single cylinder,that would be a bear to start!!!!Bet it sounds real cool though?
Starts on 96% moonshine, kicks like a horse and goes like a lawnmower..... Only one speed.... full speed! It can break your arm, as it doesn't have a pullcord. That's a later invention..... It has a wooden knob on the flywheel that's bolted on.... and it does not retract.
