jeff2wings Posted January 30, 2023 Author Share Posted January 30, 2023 So while looking through my tubs on my projects shelf I found this Enya SS50 that I picked up a while ago, it was missing the cylinder head and prop driver and the piston had suffered a bit of a trauma. I had started work on it making new head,removing the dead bearings and bead blasting it and then sticking it in the tub along with a SS40 that needed reassembly after cleaning and then forgetting about it! The piston was the biggest problem and was the reason for putting it aside. the piston crown looks a bit of a state but that's due to me attacking it with a file,and here's the reason why in the next two pictures not sure what happened to cause that damage, but it jammed the ring into ring groove, the distance from the top of the ring to crown is only .8mm so the only safe way to release it was to file it (carefully) away, so with that done....... that's the easy bit ,making the ring groove, pinning it and making the grooves for the circlips will be more of a challenge i 2 1 Quote Link to comment Share on other sites More sharing options...
David Davis 2 Posted February 1, 2023 Share Posted February 1, 2023 I have an Enya 50. I love it! I used to have it in the club's trainer but it's far too good an engine to be risked in the clumsy mitts of beginners! It's my favourite two-stroke! Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted February 1, 2023 Share Posted February 1, 2023 Hi Jeff . What alloy are you using for the SS 40 piston ? Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 11, 2023 Author Share Posted March 11, 2023 Piston made from 6082T6 just need to do the circlip grooves but it's proving to be a bit tricky setting it up accurately in the chuck! while I'm giving it some thought I have another little project for restoration ..... . 1 Quote Link to comment Share on other sites More sharing options...
Andy Stephenson Posted March 12, 2023 Share Posted March 12, 2023 11 hours ago, jeff2wings said: Piston made from 6082T6 just need to do the circlip grooves but it's proving to be a bit tricky setting it up accurately in the chuck! Jeff, Could you use Teflon plugs instead of circlips, providing the gudgeon pin doesn't ride over any of the ports. Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted March 12, 2023 Share Posted March 12, 2023 (edited) Hi Jeff could you not use Teflon pads in the Enya SS 50 gudgeon pin or are there big ports it passes ? Edited March 12, 2023 by Engine Doctor Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 12, 2023 Author Share Posted March 12, 2023 I had thought of pads in Teflon or brass but can't help but think that the Enya bros used clips for a good reason ? 🤔 If I make a fixture for machining a radius the same as that of the cylinder on the pads it should work OK, only one way to find out! Will have a go later,meanwhile I've re-machined the fuel tank on the Hallem reducing the thickness from 2.5mm too 1.3 , It's somewhat lighter now! Then made a recess in the backplate missing prop driver next will have to do something about the thread it's well wonky, it's a 1/4 bsf maybe take it down to 1 ba ? Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 12, 2023 Author Share Posted March 12, 2023 Wow! That went right first time, found some ptfe rod and used the old piston, had to reduce the length of the pin by 40thou You can see that as it travels across the port the pad is in constant contact with the cylinder, so we are good to continue reassembly 👍 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted March 12, 2023 Share Posted March 12, 2023 Its worth a go and looks good, otherwise its a another job on a mill and making a small tool for a circlip groove . Hope it works out , 👍 Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 25, 2023 Author Share Posted March 25, 2023 Enya SS50 done just need to find its silencer and give it a run. After a couple of hours working on my super 60 resto ,took some time to make the ignition timer for the Hallem, I had been pondering over its design, the photos I had found didn't really help, however it turned out the answer was right under my nose in the form of a blueprint for the engine (remember most of these were made from kits) on the late Ron Chernich's website Model Engine News 2 2 Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 26, 2023 Author Share Posted March 26, 2023 Just about finished with the machining on the Hallem, apart from making the points that will have to wait until I can find some 1/16 brass sheet that's in the workshop somewhere 😏 it's just a case of stripping and thoroughly cleaning and final assembly. I have replaced the original exhaust with this duct I made should help keeping the exhaust muck away from the model (if it runs lol!) 2 Quote Link to comment Share on other sites More sharing options...
Tim Hooper Posted March 26, 2023 Share Posted March 26, 2023 Nice work Jeff! I've also been messing about with a sparkie - an 1940s O&R 23. It's been a bit of a battle in the ignition and fuel departments; I did try to use a 12v motorcycle coil and the existing contact points, but eventually ended up using a modern CDI unit. The original prop driver has been replaced with a turned ali disc which has the required magnet pressed in. The Hall sensor was cable tied to the housing to begin with, but is now held with an ali strap. Fuel-wise, I had little luck with a 3:1 petrol/chainsaw oil mix. Yes, it would fire but not run for more than a second or two. I was advised to use a mix of Colemans camping fuel (naptha based) and thick SAE50 engine oil. Success! Now that it's a runner, I need to replace the leaking plastic fuel tank (probably try to turn one from ali), then perhaps fit some sort of variable speed control for RC use. Maybe a silencer too...... Oh yes, then decide on a suitable airframe to get it back in the air again! Tim 20230317_131331.mp4 Quote Link to comment Share on other sites More sharing options...
David Davis 2 Posted March 27, 2023 Share Posted March 27, 2023 On 25/03/2023 at 20:33, jeff2wings said: Enya SS50 done just need to find its silencer and give it a run. After a couple of hours working on my super 60 resto ,took some time to make the ignition timer for the Hallem, I had been pondering over its design, the photos I had found didn't really help, however it turned out the answer was right under my nose in the form of a blueprint for the engine (remember most of these were made from kits) on the late Ron Chernich's website Model Engine News I love my Enya 50. I may fit it to a restored WOT 4 which I cannot even give away! Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 27, 2023 Author Share Posted March 27, 2023 Well it runs but the compression is a bit soft will have to check head volume and squish clearance 20230327_160009_001.mp4 1 Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted March 31, 2023 Author Share Posted March 31, 2023 (edited) Interesting Tim,although I don't think the cdi will do much for the engines power to weight ratio ?🤔 probably better than the motorcycle coil though 😆! My O&R 23 (repo) had damaged points, as in one of the contacts had broken off, probably why it had glowplug in it when purchased, btw don't use methanol in original plastic tank as it will damage it moving contact point with the new tungsten pad silver soldered on Minimag coil/condenser luckily got two off fee-bay worth looking out for Edited March 31, 2023 by jeff2wings 1 Quote Link to comment Share on other sites More sharing options...
David Davis Posted April 1, 2023 Share Posted April 1, 2023 On 27/03/2023 at 19:04, jeff2wings said: Well it runs but the compression is a bit soft will have to check head volume and squish clearance 20230327_160009_001.mp4 34.3 MB · 0 downloads I don't know whether this applies to the Enya SS50 but earlier Enya engines were supplied with both a high and low compression head like my Enya 35 pictured below. The low compression head was intended for running in. Perhaps they had abandoned this practice by the time the SS50 was made. Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted April 1, 2023 Share Posted April 1, 2023 On 27/03/2023 at 18:04, jeff2wings said: Well it runs but the compression is a bit soft will have to check head volume and squish clearance 20230327_160009_001.mp4 34.3 MB · 0 downloads Hi Jeff the comp will be bit softer as it a ringed engine. Has it improved with running ? Was the ringed SS40 made for heli use ? Im pretty sure the SS 40 I bought some years ago was ABC construction . OS made ringed versions of some engines for heli use / continuous high speed running like the 32SX . Looking back at the first pic it does look otiginal piston had a dykes ring ? These had even lower comp when turned by hand but formed a much better seal under combustion pressure. Engine still runs OK in video . Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted June 7, 2023 Author Share Posted June 7, 2023 Latest engine build freelance 10cc ,HP 61 crankshaft and Webra liner I am getting nearer to fulfilling my ambition of flying a o/d model with an engine i have made 5 1 Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted June 14, 2023 Author Share Posted June 14, 2023 And just to show it's not just a paperweight 4 Quote Link to comment Share on other sites More sharing options...
Tim Hooper Posted June 14, 2023 Share Posted June 14, 2023 (edited) Nice work, Jeff! I've also been tatting about with an old engine - that 1940's Ohlsson & Rice .23 that I posted about a while ago. I've run out of things to hang on it; CDI ignition, bearer mounts, ali fuel tank, simple throttle, and exhaust stub and silencer. It runs on the 3:1 camping fuel/SAE50 oil mix, and is just able to drag my Murg around the circuit! The engine has really been an excuse to learn and improve on my fledgling machining skills on the lathe and mill. All of the mods are instantly reversible. Tim Edited June 14, 2023 by Tim Hooper 4 Quote Link to comment Share on other sites More sharing options...
brokenenglish Posted June 15, 2023 Share Posted June 15, 2023 Hi Tim, You were a bit unlucky with the O&R 23 that you "happened to find". They were made from 1938 until 1952, and only the 1947 model (which you have) was lugless (radial mount only). However, there was a beam/radial mount adapter available, for beam mounting, and there was also a tank mount accessory (see photo). I have a lot of Ohlssons and O&Rs and I like them a lot. Shame you found the only model with inconvenient mounting. 1 Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted June 15, 2023 Share Posted June 15, 2023 On 07/06/2023 at 19:02, jeff2wings said: Latest engine build freelance 10cc ,HP 61 crankshaft and Webra liner I am getting nearer to fulfilling my ambition of flying a o/d model with an engine i have made Hi Jeff looks geat . If you want any of the polished parts anodised then get in touch . E.D. Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted June 15, 2023 Author Share Posted June 15, 2023 Thanks ED ,it's funny you should mention that,I did buy a kit from Chronos with the blue dye with which I tried to do the crankcase/ front, but with a less than satisfactory results,most of the dye being washed out in the sealing process, so it was into the bead blaster which looks o.k. I obviously need to experiment with it and find out where I'm going wrong 🤔 but at least it runs! Nice work Tim you are half way to making a complete engine! Maybe you should have a go? Quote Link to comment Share on other sites More sharing options...
Engine Doctor Posted June 15, 2023 Share Posted June 15, 2023 Hi Jeff what electrolyte is supplied in the chronos kit ? I had to experiment an awful lot before getting god results. Green sems to be hard to get a good strong colour and red dyes work very well. Quote Link to comment Share on other sites More sharing options...
jeff2wings Posted February 25 Author Share Posted February 25 Taking a rest from balsa bashing (and the fact I'm about to fit a new kitchen 😐 ) I thought it time to revisit a old project, the Speary 5cc diesel. the engine did run but it was difficult to start and had poor running and power, so I stripped it down and checked the port timing. the exhaust and transfer being well off ? Humm,how so,well I used the drawings from Hemingway not the originals from '46-7 and compering them there is a error in the later drawings, so back on the lathe then . I also have another case that I'm going to use for a spark ignition version 1 Quote Link to comment Share on other sites More sharing options...
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