Paul Marsh Posted July 8, 2012 Share Posted July 8, 2012 You see them every now-and-then, mainly on ebay. I'm talking about why some poeple put the cylinder head fins back on wrong? Is it: People don't know what they're doing and therefore a "Black Pudding Bender". Maybe helps cooling in certain situations; or maybe looks cooler... What do you think? Examples at the moment...on ebay. IC engine with wrong head, no. 1 No. 2 Edited By Paul Marsh on 08/07/2012 13:07:18 Quote Link to comment Share on other sites More sharing options...
Codename-John Posted July 8, 2012 Share Posted July 8, 2012 I think theyre just a bit dim lol Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted July 8, 2012 Share Posted July 8, 2012 It's so that we know not to buy them. It means: 1. They probably don't know what they are doing. 2. They're probably not very mechanically minded, but worse of all, bearing the first two in mind... 3. They've had the cylinder head off!!!! No, clear indication to leave well alone I think. Actually it's very considerate of them to send us this signal when you think about it! BEB Quote Link to comment Share on other sites More sharing options...
Alan Cantwell Posted July 8, 2012 Share Posted July 8, 2012 perhaps they had the head straight, but put the engine on at an angle Quote Link to comment Share on other sites More sharing options...
fly boy3 Posted July 8, 2012 Share Posted July 8, 2012 Flew an OS 40 for many many years with the head 180 degrees out. Never missed a beat, only found out when I sold it and the buyer mentioned if I had removed the head. Could have been a Fri. afternoon shift in a Japanese factory. Cheers Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted July 8, 2012 Share Posted July 8, 2012 I have commented on this to one or two sellers. For some reason they don't appreciate my comments. Quote Link to comment Share on other sites More sharing options...
001 Posted July 9, 2012 Share Posted July 9, 2012 Won't work with old two strokes with deflector heads! Quote Link to comment Share on other sites More sharing options...
Steve Hargreaves - Moderator Posted July 9, 2012 Share Posted July 9, 2012 I agree with BEB......its a clear signal that the engine is or has been owned by a mechanical ignoramous who has at least partially dismantled it......avoid at all costs.... Quote Link to comment Share on other sites More sharing options...
Paul Marsh Posted July 9, 2012 Author Share Posted July 9, 2012 And another... No: 3 Quote Link to comment Share on other sites More sharing options...
Aaron Stevens Posted July 9, 2012 Share Posted July 9, 2012 never been played with is another give a way Quote Link to comment Share on other sites More sharing options...
Peter Beeney Posted July 9, 2012 Share Posted July 9, 2012 These pictures of cylinder heads trying to go in the wrong direction put me in mind of a little story, which I have related somewhere before. It all started back in the depths of beyond, long ago, when we all struggling to learn how to get to grips with proportional control. Someone turned up at the field with an engine in a model which would start and tick over beautifully but would not increase revs as the throttle was opened. Eventually the engine was taken out of the model, on site, and the owner denying that he’d been tinkering with it; although he was known to be a bit of a fiddler. When we took it apart we decided that the cylinder liner was in sort of back-to-front, obviously one of the types without a locating peg, so we then put it back together and of course it now ran perfectly; and at this point the owner confessing that he had previously taken it apart. Much later on, although still a long time ago, I had amongst others a fourteen year old pupil, a lad that was learning to fly. He’d got to the self-assured stage, starting his own engine etc. and was virtually solo. Dad dropped him off at our patch one Sunday afternoon, as usual, but soon he was saying “ Pete, would you have a look at my engine, please? ” The engine was starting ok but would not rev up beyond a fast tick-over, and was also making a curious muted plopping sound. So having taken just a quick look at it I told him that he had taken it apart and put it back together with the cylinder liner reversed. This he denied, but I knew that he liked to experiment, he’d previously told me how he’d taken his Grandfather’s lawnmower to pieces and put it back together; and other such adventures. So I told this might be a little bit of a porky and that I’d take it apart again and show him. What I didn’t tell him was that I’d previously seen something similar anyway but the real obvious clincher was that the cylinder head was now on at 90 degrees to normal, a fact that he was completely oblivious to! So, in two secs we had the head off, I showed and explained to him the porting in the liner and how it worked, we reassembled it, cyl. head now going straight ahead and two minutes later he was in the air and flying as normal. I’m not a big fan of the expression ‘gobsmacked’ but that might be just one rather trivial way of describing his reaction. He really really did not know what to say! He did admit then that he’d had a play with it but as I said before for about half an hour he truly thought I was God! Of course, I never did spoil that illusion by telling him that I’d seen something similar before or pointing out his deliberate mistake with the sideways pointing cylinder head! I have to say, as someone used to looking at i/c engines, it does seem remarkable that these cylinder heads can be put on in various incorrect ways and nobody apparently noticing. But, by the same token, it might also amplify slightly the fact that sometimes it can be assembled partly incorrectly, and perhaps it does’t require much in the way of adjustment to fix it. I think I would have to ask the seller why this is so, just to see exactly how convoluted the answer could actually get…… PB Edited By Peter Beeney on 09/07/2012 14:26:34 Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted July 9, 2012 Share Posted July 9, 2012 We had a chap in the club who put the cylinder liner in back to front. He did admit he had stripped the engine. I once bought a Frog 2.5 cc diesel. It would start and run but when I tried to bring it up to power the piston hit the contra piston. IT onloy took a few minutes to confirm my suspicions. The contra piston had been put in upsoiide down. IT was a nice engine after that was corrected. I have just put the listing for an Irvine engine with the head on at angle in EBay Sellers. Quote Link to comment Share on other sites More sharing options...
MikeS Posted July 9, 2012 Share Posted July 9, 2012 Back in the day I can say I did this. I replaced the bearings in a Redline 53. At first I did not notice the head was on wrong. When I went over the engine before fitting back in to my V2 Raptor the light bulb went off. Quote Link to comment Share on other sites More sharing options...
Ultymate Posted July 9, 2012 Share Posted July 9, 2012 I tell you what for all you guys waffling on, yes for sure it indicates the engine's been stripped, but I'd bet it would hardly make a degree or two of difference to the running temperature of the engine. When control line team racing we regularly used to machine fins off engines to get them to drop through bearers to facsilitate engine changes and bear in mind they were fully cowled installations, though admittedly well ducted. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted July 10, 2012 Share Posted July 10, 2012 Posted by Ultymate on 09/07/2012 19:54:20: I tell you what for all you guys waffling on, yes for sure it indicates the engine's been stripped, but I'd bet it would hardly make a degree or two of difference to the running temperature of the engine. When control line team racing we regularly used to machine fins off engines to get them to drop through bearers to facsilitate engine changes and bear in mind they were fully cowled installations, though admittedly well ducted. Very true but it does indicate that the engine has been stripped, which is not good unless essential. It also indicates that the person doing the stripping doesn't know what he is doing which leaves one wondering what else has been fitted the wrong way round and what other nasties have been committed on the engine. Quote Link to comment Share on other sites More sharing options...
Ultymate Posted July 10, 2012 Share Posted July 10, 2012 Fair point Peter but on the other hand you could be looking at a picture of an engine that looks perfect externally (indeed it could be just a generic photograph) but be totally trashed internally which is the risk one takes when trading on ebay and the likes. "Buyer Beware" as the saying goes. Not the place I would be looking for engines at all. Quote Link to comment Share on other sites More sharing options...
Peter Miller Posted July 10, 2012 Share Posted July 10, 2012 I have bought the odd pup but also some cracking bargains. Definitely I am on the winning side by a long shot. Quote Link to comment Share on other sites More sharing options...
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